Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Vibration Analysis of Sandwich Beams with Magnetorheological Elastomer Core and FGM Graphene Nanoplatelet-Reinforced Polymer Faces on Viscoelastic Foundation 447 464 9402 10.22075/macs.2025.34687.1695 EN Mohammad Javad Arabloo Faraji Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran Ali Ghorbanpour Arani Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran Ehsan Mamnoun Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran Zahra Khoddami Maraghi Faculty of Engineering, Mahallat Institute of Higher Education, Mahallat, Iran Journal Article 2024 07 08 This study investigates the free vibrations of a sandwich beam with a magneto-rheological elastomer (MRE) core reinforced with carbon nanotubes (CNTs) and polymer facings reinforced with graphene nanoplatelets (GNPs) resting on a viscoelastic foundation. To enhance the accuracy of the results, the modeling of the core and facings of the beam is based on the Timoshenko beam model, and the viscoelastic foundation is based on the visco-Pasternack model. The governing equations and boundary conditions are derived using Hamilton's principle and solved using Navier's method. After validation, the effects of beam parameters, including the applied magnetic field intensity, core and facing thicknesses, volume fraction of CNTs added to the core, volume fraction and distribution pattern of GNPs added to the facings, and foundation parameters, on the natural frequencies of the beam in different vibration modes are investigated. The results show that if the goal is to maximize the natural frequencies of the beam, adding GNPs to the polymer facings of the beam is significantly more effective than adding CNTs to the MRE core or increasing the applied magnetic field intensity to the core. The results of this research can be used in the design of sensors and actuators in many industries. https://macs.semnan.ac.ir/article_9402_ebb34dd91b680846f8f77432149b9077.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Effect of Annealing on Tensile Strength of 3D Printed PLA with Material Extrusion 465 472 8933 10.22075/macs.2024.33892.1662 EN Pichai Janmanee Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Bangkok, 10120, Thailand Pongpun Ratchapakdee Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Bangkok, 10120, Thailand Journal Article 2024 04 23 Polylactic acid (PLA) is a commonly used material in 3D printing processes. In the material extrusion (MEX) technique, the final 3D-printed parts have lower mechanical properties. The objective of this study was to investigate the tensile strength of 3D-printed PLA specimens that had undergone annealing. The variables considered were the annealing temperature and the annealing time, with three temperature levels: 70 , 90 , and 110 , and two annealing times: 60 and 90 minutes. The cooling rate is set at 10 °C per hour and cools in the furnace for 24 hours. The results showed annealing significantly affected the tensile strength, with annealed parts demonstrating a notable increase in tensile strength compared to non-annealed parts. Comparing the tensile strength values of pieces that did not undergo annealing, annealed pieces exhibited higher tensile strength. The elasticity modulus tends to decrease, and the workpiece size shrinks slightly in all directions. In the results of the annealing experiment on the<strong> </strong>ankle foot orthosis (AFO) for pediatric patients with foot drops, it was found that the ankle foot orthosis<strong> </strong>specimen that had been annealed shrank in all directions with relatively little change. When annealed workpieces are applied, there is no need to compensate for the workpiece size. The highest tensile strength was achieved when annealing was carried out at a temperature of 110 °C for a duration of 90 minutes. The annealed specimen showed an average 42% increase in tensile strength when compared with the printed specimen. The higher the temperature of this glass transition, the higher the calorific value, which will affect the arrangement of the chain and the crystallinity of the plastic and lead to changes in its physical properties. Moreover, the study findings indicate that the optimizing tensile strength of thermoplastic materials can be considerably increased by choosing the ideal process parameters and post-processing conditions. https://macs.semnan.ac.ir/article_8933_459561fbd0044d3ca6edb987b1f56df2.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Enhancing Strength of Nomex Sandwich Structures through the Utilization of Nano Clay Dispersed Epoxy Resin: A Study in Aerospace Applications 473 482 8934 10.22075/macs.2024.33953.1669 EN Amirreza Ardebili Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran Mohammad Hossein Alaei Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran Amir Kaveh Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran Jafar Eskandari Jam Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran Journal Article 2024 04 29 Nomex sandwich structures are highly preferred in aerospace applications for their combination of lightweight and robust design. These panels feature Nomex honeycomb cores sandwiched between composite face sheets, usually made of CFRP or fiberglass, providing outstanding strength-to-weight ratios. The heat-resistant properties of Nomex enhance their suitability for aerospace environments, maintaining structural integrity even under high temperatures. These structures find application in aircraft fuselages, wings, and interior components, enhancing performance while minimizing weight. In this study, the effect of dispersing 30B nano clay in epoxy resin on the shear strength and flexural strength of Nomex honeycomb sandwich panels with CFRP skins and Nomex cores was investigated. Initially, 30B nano clay was dispersed in epoxy resin using two methods: ultrasonic mixing and high-speed stirrer, at weight percentages of 0.5%, 1%, 3%, and 5%. Then, three-point bending specimens were fabricated to assess interlaminar shear strength, fracture toughness, and flexural strength. Adding nano clay to the epoxy resin resulted in increased fracture toughness, with the highest toughness achieved at 1% weight percentage in both mixing methods. Moreover, nano clay increased the interlaminar shear strength, particularly with a carbon substrate. However, due to reduced adhesion between the substrate and resin, the interlaminar shear strength decreased compared to pure resin. The flexural strength results showed that adding a resin layer to the sandwich specimen increased strength and flexural modulus by up to 20%. https://macs.semnan.ac.ir/article_8934_ee7ad0d448a0b172166fa323ad0c5f7c.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Comparative Study on Impact Responses of Sandwich Composites with Stiff and Compliant Core Materials 483 496 9191 10.22075/macs.2024.32403.1584 EN Mohan Kumar Tumkur Sadashivaiah Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Karnataka, India Sharnappa Joladarashi Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Karnataka, India Satyabodh Madhav Kulkarni Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Karnataka, India Journal Article 2023 11 22 The current investigation focused on the Finite element analysis (FEA) study on the outcome of sandwich composite's low to high-velocity impact responses. The sandwich structure comprises jute, natural rubber as skin, and epoxy/ natural rubber as a core, mixed with sand as a filler <br />(0%-40%) material for bonding skin, and core B-stage cured natural-based prepreg is employed. The structure is impacted with a low velocity of 10 m/sec, an Intermediate of 50 m/sec, a high-velocity impact of 100m/sec, and ballistic velocity impact of 350 m/sec. Based on the results in terms of energy absorption, filler plays a vital role in increasing energy absorption capabilities for all configurations. The sandwich structure with rubber as the core offers better energy absorption capability because of its flexible nature. For further study, sandwich structures with a 40% sand filler were examined, with a velocity limit of 350 m/s. Varying the core thickness from 5 to 20 mm revealed that increasing the core thickness and filler composition in both configurations results in 0.37% for FR40F and 1.70% for FE40F higher energy absorption. Rubber core sandwiches outperformed epoxy core, suggesting the potential utility of rubber and sand-filled cores in ballistic-loaded sandwich structures. https://macs.semnan.ac.ir/article_9191_31c85fa7976672a0a0a1b50491eab2e3.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Influence of Kevlar on Impact Damage Assessment of Carbon Fiber Hybrid Composite Laminate 497 505 8981 10.22075/macs.2024.34408.1685 EN Sunith Babu Loganathan Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru, 560054, India Centre for Advanced Materials Technology, Ramaiah Institute of Technology, Bengaluru, 560054, India Deepak Swamy Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru, 560054, India 0000-0002-4304-0075 Nandeesh Hosanagara Lokesha Department of Mechanical Engineering, Ramaiah Institute of Technology, Bengaluru, 560054, India Ramesh Suryanarayana Sharma Department of Mechanical Engineering, R. V. C. E, Bengaluru, 560059, India Journal Article 2024 06 10 Composites are advanced materials composed of distinct components with different properties, typically a reinforcing fiber and a matrix material. These components create a material with unique properties such as high strength, low weight, and corrosion resistance. Composites are extensively used in aerospace, automotive, construction, and sports equipment, revolutionizing product design and engineering by offering tailored solutions for specific performance requirements. Damage in composites, especially due to low-velocity impacts from runway debris or tool drops, poses significant challenges, particularly in the aerospace sector where such impacts can be catastrophic. This study investigates the low-velocity impact (LVI) of Carbon/Kevlar hybrid composites, focusing on the influence of Kevlar in Carbon fiber laminates under different impact energies. Unlike previous research, this work examines the effects of an asymmetric stacking sequence of Carbon-Kevlar layers. Results show that with increased impact energy, variations in peak force, contact duration, and damage area are noted by altering the presence of Kevlar on top and bottom layers with carbon fibers. Kevlar-topped laminates exhibited a peak force reduction of 8.2% at 8J impact energy compared to carbon-topped laminates. Additionally, the contact duration for Kevlar-topped laminates was 21.4% shorter at 16J impact energy. Damage area studies revealed that Kevlar-topped laminates had 19% smaller damage areas on the top face and 28% smaller on the bottom face at 8J impact energy. These findings have significant implications for designing composite materials in high-performance applications, particularly in aerospace. This research advances composite material science, providing valuable insights for developing more durable and reliable hybrid laminates within the same laminate. https://macs.semnan.ac.ir/article_8981_c71845a558bbd666f6fcd788038e653e.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Optimal Replacement of Glass Fabric with Carbon Fabric in Epoxy Matrix Composite 507 522 9197 10.22075/macs.2024.33943.1667 EN Shivanku Chauhan Department of Mechanical Engineering, ABES Engineering College, Ghaziabad, 201009, India Aniket Ramnath Nagargoje School of Mechanical Engineering, MIT Academy of Engineering, Pune, 412105, India Murlidhar Patel Department of Mechanical Engineering, PDPM Indian Institute of Information Technology, Design and Manufacturing (IIITDM), Jabalpur, 482005, India 0000-0003-3110-2547 Aditya Roy School of Engineering and Technology, Shri Venkateshwara University, Gajraula, 244236, India Journal Article 2024 04 28 The aim of this study is to investigate the optimum replacement of glass fabric with carbon fabric in epoxy matrix composites, focusing on achieving comparable mechanical properties while reducing manufacturing costs. The glass and carbon fabric-reinforced epoxy matrix hybrid composites are prepared with varying hybrid ratios of reinforcements (ratio of carbon fabric to total fabric) using the vacuum pump-assist hand lay-up technique. The composite samples are made in the shape of a plate. To analyze the tensile and flexural strengths of the fabricated composite samples, they are cut into corresponding dimensions as per ASTM standards. The effect of varying sequences of laminas and numbers of glass fabric and carbon fabric laminas on the mechanical properties of the composite is studied and compared, respectively. The improvements of 53.82% and 98.67% in the tensile strength and flexural strength, respectively, are noticed with an increment of the hybrid ratio from 0 to 1. The obtained results of the composites with various hybrid ratios can be used to select an optimal flexural strength as well as tensile strength in relation to a specific application and cost. https://macs.semnan.ac.ir/article_9197_02a062f4fbcc0b7364a99b132c218dc7.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Effect of Microstructural Features and Al2O3 Doping on Aging Resistance, Mechanical Properties and Crack Propagation in 3Y-TZP Plate Ceramics for Dental Restorations: A Comprehensive Peridynamics Study 523 554 9241 10.22075/macs.2025.34610.1694 EN Alireza Moradkhani Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran Mohammad Hoseinpour Gollo Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran 0000-0003-4633-1318 Valiollah Panahizadeh Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran Journal Article 2024 06 28 This study investigates the effects of microstructural features, nanoporosity, and micro-cracks on macro-crack propagation in 3Y-TZP plate ceramics doped with Al₂O₃ (0 to 0.5 wt%) for dental restoration applications, utilizing peridynamics (PD) theory for the first time. The research employs ordinary state-based PD to offer new insights into these interactions. Materials are synthesized through high-energy ball milling of ZrO₂ powders at 1500 °C for 2 h. Mechanical properties, including density, average porosity diameter, Young’s modulus, Poisson’s ratio, and fracture toughness (<em>K</em>_IC), are rigorously assessed. Results indicate that increasing Al₂O₃ content to 0.5 wt% enhances relative density, hardness, Young's modulus, <em>K</em>_IC, and flexural strength to 99.5%, 15.1 GPa, 280 GPa, 9.97 MPa·m^1/2, and 355 MPa, respectively, while low-temperature degradation over 800 h shows that Al₂O₃ doping significantly reduces aging kinetics. PD simulations demonstrate that micro-cracks substantially affect crack propagation, revealing a 15% reduction in macro-crack speeds compared to FEM results. This research enhances the understanding of dental ceramics and establishes a foundation for analyzing fractures in dental restoration ceramics using PD. https://macs.semnan.ac.ir/article_9241_91347b27c4a9b8a29a19ef3722628651.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Numerical and Analytical Investigation of Free Vibration Behavior of Porous Functionally Graded Sandwich Plates 555 568 9200 10.22075/macs.2024.34962.1710 EN Emad Kadum Njim Ministry of Industry and Minerals, State Company for Rubber and Tires Industries, Najaf, Iraq Mohammed Hamza Al-Maamori Prosthetics & Orthotics Eng. Department, College of Engineering, AL-Mustaqbal University, 51001 Hillah, Babil, Iraq Royal Madan Department of Mechanical Engineering, Graphic Era (Deemed to be University), Dehradun, 248002, Uttarakhand, India Sadeq Hussein Bakhy University of Technology, Mechanical Engineering Department, Baghdad, Iraq Muhannad Al-Waily University of Kufa, Faculty of Engineering, Mechanical Engineering Department, Najaf, Iraq Pallavi Khobragade Department of Civil Engineering, Dev Bhoomi Uttarakhand University, Dehradun, India Lazreg Hadji Department of Civil Engineering, University of Tiaret, Tiaret, 00213, Algeria Journal Article 2024 08 05 This study investigates the free vibration analysis of a sandwich plate made of functionally graded materials (FGMs) with porosities to evaluate the natural frequency. Five parameters contribute to FGM: porous index, elastic parameters, porosity ratio, length-to-thickness ratio, and length-to-width ratio. Taking into account the thickness of the FGM plate, it is assumed that the plate has a new distribution of porosities. An investigation based on classical plate theory (CPT) examines kinematic relationships. This paper presents results for metal-ceramic functionally graded rectangular plates with a power law through the variation of volume fractions with porous ratio. A margin of error of not more than 5% applies to thin and thick plates. To validate the analytical results, a numerical investigation was conducted by employing the finite element method using ANSYS. This investigation was conducted on a 3D model of an FG system with SOLID186 an eight-noded element. Using various boundary conditions and selected models, illustrated the influence of porosity distribution characteristics on sandwich plate dynamic response. It was found that the frequency parameter of the plate increases with the increase in the sandwich structure mounting constraints. The plate thickness was divided into N layers to show the effect of several layers on the obtained results. It was found that the natural frequency for the FGM sandwich plate remains the same regardless of the number of layers for the same FGM thickness. https://macs.semnan.ac.ir/article_9200_7143130d84031dd2a1ac1be679c55d13.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Design and Analysis of Complementary Split Ring Resonator Based Low Profile Antenna Using Lightweight Polymers for Wireless, Radar and Satellite Communication 569 584 8979 10.22075/macs.2024.33851.1657 EN Saranya Srinivasan Department of Electronics and Communication Engineering, Shri Eshwar College of Engineering, Vadasithur, Coimbatore, 641202, India Emilda Irudhaya Mari Victor Department of Electronics and Communication Engineering, Sri Ramakrishna Engineering College,Vattamalaipalayam, Coimbatore - 641022, India Jose Benedicta John De Britto Department of Electronics and Communication Engineering, Sri Ramakrishna Engineering College,Vattamalaipalayam, Coimbatore - 641022, India Jayanandini Muruganandam Department of Electronics and Communication Engineering, Sri Ramakrishna Engineering College,Vattamalaipalayam, Coimbatore - 641022, India Journal Article 2024 04 21 The article introduces a novel antenna design aimed at addressing the demands of communication technologies. The antenna configuration involves a circular patch coupled with a coplanar waveguide (CPW) and incorporates circular split-ring resonators (SRR) on a Polydimethylsiloxane (PDMS) substrate. The use of PDMS, a flexible and durable material, enhances the antenna's mechanical properties and allows for versatility in various environments. The designed antenna has an overall area of 50x40mm2. The innovative design exhibits resonances at distinct frequencies, specifically 3.3 GHz, 9.7 GHz, and 10.5 GHz, with a return loss of -61.86dB, -31.72dB, -51.81dB, and VSWR of 0.01, 0.5, 0.2 catering to the requirements of wireless communications, radar systems, and satellite applications, respectively. The requirement of the high-end communication module is satisfied by the array configuration resulting in improved directivity and gain. The array module of 2x2 and 4x4 is simulated and analyzed. The choice of the array is selected based on the end application. The requirement of the high-end communication module is satisfied by the array configuration resulting in improved directivity and gain. The array module of 2x2 and 4x4 is simulated and analyzed. The choice of the array is selected based on the end application. https://macs.semnan.ac.ir/article_8979_b4e541751c3ed6a5bf388578fb22da7b.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 A New Numerical Solution of 3D Nonlinear Thermo-Mechanical Bending Analysis of Functionally Graded Annular Thick Plate Under Asymmetric Boundary Conditions and Non-Uniform Local Loading 585 596 9531 10.22075/macs.2025.34937.1714 EN Amir Reza Golkarian Department of Mechanical Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran Mehrdad Jabbarzadeh Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran Journal Article 2024 08 11 In this study, the numerical solution of the nonlinear thermo-mechanical bending analysis of functionally graded (FG) annular thick plates, based on 3D elasticity theory and resting on Winkler-Pasternak elastic foundations, is presented under mechanical, thermal, and thermo-mechanical loading using the semi-analytical polynomial method (SAPM). This study represents the first report of bending analysis of plates under asymmetric boundary conditions and non-uniform local loading. The bending of an FG annular thick plate subjected to general or local, uniform or non-uniform loadings for different symmetric and asymmetric boundary conditions—clamped, simply supported, and free edges—is studied. Considering the fact that no study has been conducted on 3D asymmetric bending analysis, the influences of different positions, areas, intensities, and functions of uniform and non-uniform, general and local loading under symmetric and asymmetric boundary conditions on deflection and thickness variations are investigated and the results are compared with those obtained from ABAQUS software. The most significant result in the case of local loading is one that in some cases, the plate may experience higher deflection than when the general loading is covered all area of the plate https://macs.semnan.ac.ir/article_9531_e2d74686e611bdb63f31a1c6fdec2656.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Lattice Structure Optimization of 3D Printed TPMS under Different Loading Conditions Using Regression Machine Learning 597 613 9243 10.22075/macs.2025.35429.1732 EN Rakesh Motgi Department of Mechanical Engineering, A. G. Patil Polytechnic Institute, Solapur, 413008, Maharashtra. India 0009-0004-8929-5075 Vijay Kumar Jatti Department of Mechanical Engineering, Bennett University, 201310, Greater Noida India Shahid Tamboli Department of Mechanical Engineering, Symbiosis Institute of Technology, Symbiosis International University, Pune, 412115, Maharashtra. India Javed Dhalait Department of Mechanical Engineering, A. G. Patil Polytechnic Institute, Solapur, 413008, Maharashtra. India Journal Article 2024 09 25 Modern manufacturing techniques have been significantly transformed by additive manufacturing (AM). Because of its capabilities like customized part manufacturing and, the ability to manufacture intricate and complex parts with reduced waste of material, additive manufacturing is becoming more popular. However, the properties of the parts manufactured by this method significantly vary with the variation in process parameters. Optimizing these parameters helps to extract enhanced mechanical properties. In addition, lattice structures have created new possibilities for increasing strength while lowering part weight through optimized lattice structures. The effect of lattice structure and process parameters on the specimen made using the fused deposition method (FDM) is the major focus of this study. In this work, three distinct TPMS-base (Triply Periodic Minimal Surfaces) lattice architectures are examined for a range of layer height levels. Investigations are conducted using the L9 orthogonal array. The FDM technique uses PLA plastic filament. The Taguchi method was used for optimization, and samples were evaluated on the UTM and Izod impact testing machines. Moreover, an ML model is created by applying machine learning to the collected data. In tensile and impact test data, neural network and Gaussian process regression models showed low error rates and predicted good accuracy. The neural network model for the flexural test data showed a moderate level of accuracy, suggesting potential for improvement. The models' performance was highlighted by their low RMSE, MSE, and MAE values, which show that they can predict material properties. The overall findings indicated that layer height has less impact on tensile and flexural strength than lattice structure. In contrast to the lattice structure, layer height influences the toughness. https://macs.semnan.ac.ir/article_9243_e9b6f388a75ab18c79d07f4d77402692.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Tensile, Flexural, and Impact Strength Analysis of a 3D Printed Carbon Fiber Reinforced Nylon Filament 615 627 9236 10.22075/macs.2024.35556.1742 EN Javed Dhalait Department of Mechanical Engineering, A. G. Patil Polytechnic Institute, Solapur, Maharashtra, 413008, India Vijay Kumar Jatti Department of Mechanical Engineering, Bennett University, Greater Noida, 201310, India Shahid Tamboli Department of Mechanical Engineering, Symbiosis Institute of Technology, Symbiosis International University, Pune, Maharashtra, 412115, India Rakesh Motgi Department of Mechanical Engineering, A. G. Patil Polytechnic Institute, Solapur, Maharashtra, 413008, India 0009-0004-8929-5075 Journal Article 2024 10 09 3D printing is one of the most popular methods for prototyping and manufacturing lightweight and complex parts in recent years. The fused filament fabrication (FFF) method is preferred due to its ease of operation. Different plastics can be used as additive materials, such as filaments.  To enhance the mechanical properties of 3D printed products researchers are developing new composite materials. By varying the parameters associated with the manufacturing of these materials, mechanical properties can be altered. This study aimed to find out the effect of printing parameters in Carbon fiber-reinforced Nylon to get better mechanical properties. In this study chopped carbon fibers are reinforced in Nylon base material to get the ‘FFF 3D printing’ filament material. Infill density and shell perimeter were varied to get different specimen types. The specimens were prepared as per the ASTM standards for the tensile, flexural, and impact testing.  Machine learning is used to predict the parameters for tensile, flexural, and impact strength. The study shows the effect of printing parameters on mechanical properties like flexural strength and tensile strength. Infill percentage shows a significant effect on mechanical strength. The ML regression model shows higher accuracy for tensile strength than the flexural and impact strength. https://macs.semnan.ac.ir/article_9236_b8c923495a276b9d8be7d606f39a5570.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Meshfree Approach for the Torsional Analysis of Orthotropic and FGM Thin-Walled Open Sections 629 644 9431 10.22075/macs.2025.34565.1692 EN Ram Bilas Prasad Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, U.P., 273010, India Rahul Kumar Department of Mechanical Engineering, DDU Gorakhpur University, India Jeeoot Singh Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, U.P., 273010, India Journal Article 2024 06 25 The torsional study of different engineering sections made up of orthotropic and functionally graded material is presented in this paper. Prandtl’s stress function approach is used for the formulation of governing differential equations. Thin plate spline (TPS) radial basis function-based collocation meshfree method is utilized for discretization and solution of the governing differential equations. A classical power law is considered for the modeling of FGM material. A computer program is developed for the solution of the discretized partial differential equations. To assess the efficacy and accuracy of the present mesh-free approach, a numerical example of an equilateral triangle is considered to conduct a convergence and accuracy test. Finally, the torsional stiffness and shear stress for the orthotropic and FGM sections of the equilateral triangle, L-section, and T-sections are computed. The novelty in the present meshfree methodology lies in the handling of the singular behavior of re-entrant corners. The effect of stress concentration can be seen at the re-entrant corners. The proposed methodology shows excellent performance in solving these types of torsion problems. https://macs.semnan.ac.ir/article_9431_1ee0fdcf571c8729974c02c9e1b07260.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Vibration Response of a Sandwich Higher-Order Micro Beam based on Shear and Normal Deformation Theory on Kerr Elastic Foundation with Thickness Stretching Effect 645 670 9597 10.22075/macs.2025.35667.1749 EN Seyed Amir Sajadian Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Ghotb Ravandi Blvd., Kashan, Iran Mehdi Mohammadimehr Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Ghotb Ravandi Blvd., Kashan, Iran Mohsen Irani Rahaghi Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, Ghotb Ravandi Blvd., Kashan, Iran Journal Article 2024 10 19 The novelty of this study is to consider the vibration analysis of a sandwich structure using shear and normal deformation beam theory (SNDBT) with a porous core and various reinforcement materials, including carbon nanorods (CNRs), graphene platelets (GPLs), and carbon nanotubes (CNTs), by considering the size effect based on modified couple stress theory (MCST) or nonlocal strain gradient theory (NSGT) on various elastic foundation such as Winkler, Pasternak, and Kerr, simultaneously. Also, each layer in the microbeam has different mechanical properties as a function of temperature. The governing equations of motion are derived using Hamilton's principle and the energy approach by considering the variational method, and then these equations are solved using Navier's method. The results are compared with those recently published by other scientists. The purpose of this study is to present a comprehensive and efficient innovative analytical framework for understanding the vibration behavior of a sandwich microbeams with different cores and reinforcements, and types of elastic foundations. In the higher-order shear and normal deformation theory by applying the stretching functions, the proposed model offers advantages that can increase the computational efficiency. In addition, a comprehensive parametric study is carried out to evaluate the effect of various properties, including porosity distributions, small-scale parameters, different elastic foundations, thickness, axial wave number, small-scale theories, volume fraction, and different reinforcements such as GPLs, CNTs, and CNRs. It is concluded that GPLs have the highest frequency, and CNRs have the lowest frequency. Also, by increasing the volume fraction of the reinforcements, the natural frequency of the sandwich microbeam increases for GPLs by 10%, the CNTs by 7%, and the CNRs by 4%. The current study shows that the considering of an elastic foundation for a beam has been demonstrated to result in an increase in the frequencies. Furthermore, the results with and without the thickness stretching effect show that the shear and normal beam theory improves the results. The natural frequency increases by 67.4%, when FG-XX is compared to FG-UU face sheets. It decreases by 24.8% when FG-OO is compared to FG-UU. The sandwich beams are compared to those without reinforcement. https://macs.semnan.ac.ir/article_9597_fa91e4c9c4c95c962fe3748fc7d16941.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Effects of Cooling Conditions and Machining Parameters on Thrust Force, Surface Roughness, and Hole Quality in Machining of Fiber Metal Laminates 671 683 9655 10.22075/macs.2025.29297.1460 EN Meisam Khademitab Faculty of Mechanical Engineering, Semnan University, Semnan, Iran, P.O. Box: 35131-19111, Iran Vahid Abedini Faculty of Mechanical Engineering, Semnan University, Semnan, Iran, P.O. Box: 35131-19111, Iran Alireza Hajialimohammadi Faculty of Mechanical Engineering, Semnan University, Semnan, Iran, P.O. Box: 35131-19111, Iran Journal Article 2022 12 14 The machining of Fiber Metal Laminates (FMLs), such as glass laminate aluminum reinforced epoxy (GLARE), presents significant challenges due to the varying mechanical and thermal properties of its constituent materials. This study investigates the effects of cooling conditions and machining parameters on thrust force, surface roughness, and hole quality in FMLs. A comparative analysis of two hole-making techniques—twist drilling and helical milling—is performed on two thicknesses of GLARE, under both Minimum Quantity Lubrication (MQL) and dry conditions. The experimental work utilized the Response Surface Methodology (RSM) to assess the impact of spindle speed, feed rate, and cooling conditions on thrust force, torque, surface roughness, and hole quality. Results show that helical milling significantly reduces thrust force by 66% to 81% compared to twist drilling, although it requires a 300% increase in machining time. MQL was effective in decreasing thrust force and surface roughness in both methods. The thicker GLARE samples experienced a 17% to 32% increase in thrust force, leading to higher surface roughness. Spindle speed influenced thrust force by up to 60.68% in twist drilling, whereas feed rate showed the most significant effect (64.19%) in helical milling. This study highlights the advantages of helical milling in reducing machining forces and improving surface quality, despite its longer process time. The results provide useful information for machine configuration optimization, particularly for aerospace applications that frequently use FMLs like GLARE. https://macs.semnan.ac.ir/article_9655_cb21783c278831bd0de25195b555ed8e.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Modeling Aeroelastic Vibration Dampening in Wind Turbine Blades using Piezoelectric Materials 685 694 9430 10.22075/macs.2025.32211.1580 EN Hadja Yakoubi LMSE laboratory, Mohammed El Bachir ElIbrahimi University, Bordj Bou Arreridj, Algeria Aida Cherif Electromechanical Department, Mohammed El Bachir ElIbrahimi University, Bordj Bou Arreridj, Algeria Mounir Meddad Electromechanical Department, Mohammed El Bachir ElIbrahimi University, Bordj Bou Arreridj, Algeria Issam Meghlaoui Electromechanical Department, Mohammed El Bachir ElIbrahimi University, Bordj Bou Arreridj, Algeria Nabil Derbel National School of Engineers, Sfax, Tunisia Journal Article 2023 11 06 Aeroelastic vibrations, caused by the complex interaction between aerodynamic forces and the structural dynamics of wind turbine blades, are a major contributor to fatigue, structural damage, reduced efficiency, and increased maintenance costs in wind turbine systems. Addressing this issue is critical for enhancing wind turbine’s operational performance, durability, and lifespan, making vibration control a key focus in the renewable energy industry. This paper investigates the Synchronized Switch Damping (SSD) modal method, a nonlinear control technique specifically chosen for its ability to efficiently mitigate aeroelastic vibrations by targeting and suppressing unwanted vibration modes. By synchronizing a piezoelectric component with a designated electrical circuit in harmony with the blade's movement, the SSD modal method provides precise and adaptive vibration control. Our study demonstrates the effectiveness of the Semi-active Modal SSD approach, achieving a notable 30.42% reduction in blade vibration. This substantial reduction enhances not only the overall performance but also the longevity of wind turbine blades, offering a significant advancement in vibration control strategies and contributing to the development of more reliable and efficient wind energy systems. https://macs.semnan.ac.ir/article_9430_7a77a59a16dd4f1681b3e54d43af3a76.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Pandanus Tectorius Fiber/ Rice Husk Powder as Green Reinforcement for Lightweight Composites: Evaluation of Impact Strength Properties and Thermal Stability 695 706 9240 10.22075/macs.2025.35366.1730 EN Nasmi Herlina Sari Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia . Suteja Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia . Sujita Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia Sanjay Mavinkere Rangappa Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand Dicky Hartawan Dwitama Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia Suchart Siengchin Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand Yudy Surya Irawan Department of Mechanical Engineering, Faculty of Engineering, University of Brawijaya, Indonesia Journal Article 2024 09 17 Agricultural wastes such as <em>Pandanus tectorius</em> fiber (DPs) and rice husk powder (RHs) are cost-effective, low-density, biodegradable, and environmentally friendly materials. This study investigates the impact strength and thermal properties of polyester composites with varying DPs/RHs ratios. DPs treated with 20% NaOH were combined in 10%, 15%, 20%, and 30% (vol.), while RHs were varied from 5% to 10% (vol.). The results showed that increasing fiber content improved the composite's impact strength and thermal stability. The highest impact strength was achieved by sample G30/10 (30% DPs: 10% RHs) at 55.8 ± 1.89 KJ/mm², while the lowest was X10/5 (10% DPs: 5% RHs) at 22.23 ± 3.4 KJ/mm². Sample X30/5 (30% DPs: 5% RHs) exhibited the best thermal stability with only 4.47% weight loss, whereas sample G15/10 (15% DPs: 10% RHs) experienced 67% weight loss. SEM analysis revealed fiber-matrix interactions influencing impact properties. These findings suggest that DPs/RHs composites could be applied in lightweight, green thermal insulation solutions, and automotive components, promoting sustainable waste utilization. https://macs.semnan.ac.ir/article_9240_6dd3ae2566aeee4bf8a5168b1daf3622.pdf

Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 An Overview of Progression and Recent Trends in Additively Manufactured AlSi10Mg Alloy through Scientometrics 707 726 9656 10.22075/macs.2025.34263.1681 EN Karthikeyan Lakshmanan Department of Mechanical Engineering, Ramco Institute of Technology, Rajapalayam, 626117, India Pitchipoo Pandian Department of Mechanical Engineering, PSR Engineering College, Sivakasi, 626140, India Rajakarunakaran Sivaprakasam Department of Mechanical Engineering, Ramco Institute of Technology, Rajapalayam, 626117, India Vignesh Kumar Vijaya Kumar Department of Mechanical Engineering, K. Ramakrishnan College of Technology, Trichy, 621112, India Journal Article 2024 05 27 This review presents a scientometric analysis of statistical research publications in the field of additively manufactured AlSi10Mg alloy and provides an extensive stance on research transition for the interested researchers in this field. Many researchers attempted to write review articles with manual work that ended with inadequate expertise to link common areas of the literature in a systematic and sequential manner. At present, most of the researchers’ challenges include gathering bibliometric sources with mapping, keyword collections, the  author’s network, and year-wise progression in research areas. In this review, the Scopus engine was used to locate, gather required information, and statistics for consideration. The keywords AlSi10Mg and additive manufacturing were used in the Scopus search engine while collecting the relevant literature archives for the last ten years from 2014 to 2023. The VOSviewer software tool was used to visualize and create the bibliometric links from 1260 related documents, which contained abstracts, bibliographic citations, and other keywords. The review also summarized the various additive manufacturing processes of AlSi10Mg alloys.  This review revealed that the Journal of "Additive Manufacturing" has the highest publication record in the research on additively manufactured AlSi10Mg alloys, with Gu Dongdong being the most productive researcher with 23 articles and 2131 citations. China, Italy, and Germany have the highest publication records. Laser bed fusion is the most preferred additive manufacturing process for producing AlSi10Mg to achieve the desired properties and the facility to apply numerous processing parameters. https://macs.semnan.ac.ir/article_9656_3a16dd666c5affb352074e6ebcf9d615.pdf