Mechanics of Advanced Composite Structures

Mechanics of Advanced Composite Structures

Thermal Behaviour and Coupling Effects in Laminated Composite Beam Structures Using Refined Shear Deformation Theory

Document Type : Research Article

Authors
Arati Arvind Waghmare
Sanjay Kantrao Kulkarni
Department of Civil Engineering, Symbiosis Institute of Technology, Symbiosis International (Deemed University) Lavale, Pune-412115, Maharashtra, India
10.22075/macs.2026.39435.1939
Abstract
This study investigates the thermoelastic behaviour of laminated composite beams with symmetric (0/90/0) and asymmetric (0/90) layer-ups subjected to sinusoidally distributed thermal line loads. A quasi-3D shear deformation theory incorporating parabolic and trigonometric through-thickness functions based on Reddy’s refined model forms the core analytical framework. The governing equations are derived from the principle of virtual work and solved in closed form via a Navier-type series. The classical beam theory and first-order shear deformation theory are employed solely for comparative analysis. The thermal line load model, representing realistic non-uniform heating scenarios, enables assessments of coupling effects due to laminate asymmetry. Results reveal that asymmetric configurations exhibit significant thermal coupling leading to higher displacements and stress concentrations, while symmetric laminated beams offer improved thermal stability. A MATLAB-based computational tool supports the analysis. The findings underscore the critical role of stacking symmetry in mitigating thermal deformations, guiding the design of reliable composite structures for thermally demanding environments.
Keywords
Cross-ply
Quasi 3D theories
Temperature gradient
Navier-type series
Subjects
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Mechanics of Advanced Composite Structures
Volume 14, Issue 1 - Serial Number 29
In Progress
April 2027
Pages 199-216