Investigation of fatigue phenomenon in short-fiber reinforced composites

Articles in Press

Document Type : Research Article

Authors

1 Composites Research Laboratory, CollegeofInterdisciplinaryScienceandTechnology, University of Tehran

2 Composites Research Laboratory, College of InterdisciplinaryScienceandTechnology, University of Tehran

Abstract

Nowadays, the use of short fiber reinforced composites (SFRC) has become very wide. In the meantime, the investigation of the fatigue behavior of this group of composites is a very demanding topic. In this research, the behaviour of SFRC is computationally studied under cyclic loading for both aligned and randomly-oriented SFRC. As a novel approach, a methodology developed for long-fiber composite is adopted for the purpose of fatigue analysis of SFRC through a micro-macromechanical approach. Namely, the aligned SFRC is firstly converted into virtual long-fiber composite at microscale and then fatigue analysis is performed at macroscale. For randomly-oriented SFRC composite, laminate analogy approach is employed to transform it into virtual long-fiber laminated composites and then fatigue analysis is implemented. The estimated results through computational modelling are compared with available experimental observations in literature. The discrepancy between predictions and experimental measurements for aligned SFRC falls below 10% implying on proper performance of proposed method for aligned SFRC. However, some improvements are required for the specific purpose of randomly-oriented SFRC, since the discrepancy exceeds 25%.

Keywords

Main Subjects

Mechanics of Advanced Composite Structures

Articles in Press, Accepted Manuscript
Available Online from 18 June 2026

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