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Fatigue Reliability Analysis of Fiber-Reinforced Laminated Composites by Continuum Damage Mechanics

Fatigue Reliability Analysis of Fiber-Reinforced Laminated Composites by Continuum Damage Mechanics This paper investigates the reliability of composite laminates with various lay-ups under fatigue loading. The prediction of failure probability of composite laminates subjected to different loads involves many uncertainties associated with mechanical properties, loading, and boundary conditions. Failure in the composite material is truly hard to trace because there are individual faults in each ply, and we face a stochastic process due to the scatter in the mechanical properties. The continuum damage mechanics (CDM), as a powerful approach, is applied to model the damage of fiber, matrix, and fiber/matrix debonding. This method defines criteria for damage detection and determines safe zones. The material constitutive equations are executed using a subroutine in Abaqus. The first-order reliability method and second-order reliability method have been applied to examine the reliability of laminated composites. The results are compared with those of the Monte Carlo simulation. Different composite laminates under different stress levels are considered for the failure probability investigation. The limit state functions and random variables have been determined based on the CDM model. Finally, the effects of the number of cycles, applied stress, and stacking sequence of the laminate on the reliability and fatigue life in fiber-reinforced laminated composites are assessed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Mechanica Solida Sinica Springer Journals

Fatigue Reliability Analysis of Fiber-Reinforced Laminated Composites by Continuum Damage Mechanics

Gholami, Peyman
Acta Mechanica Solida Sinica , Volume OnlineFirst – Mar 14, 2023
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Publisher
Springer Journals
Copyright
Copyright © The Chinese Society of Theoretical and Applied Mechanics 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
0894-9166
eISSN
1860-2134
DOI
10.1007/s10338-023-00385-0
Publisher site
See Article on Publisher Site

Abstract

This paper investigates the reliability of composite laminates with various lay-ups under fatigue loading. The prediction of failure probability of composite laminates subjected to different loads involves many uncertainties associated with mechanical properties, loading, and boundary conditions. Failure in the composite material is truly hard to trace because there are individual faults in each ply, and we face a stochastic process due to the scatter in the mechanical properties. The continuum damage mechanics (CDM), as a powerful approach, is applied to model the damage of fiber, matrix, and fiber/matrix debonding. This method defines criteria for damage detection and determines safe zones. The material constitutive equations are executed using a subroutine in Abaqus. The first-order reliability method and second-order reliability method have been applied to examine the reliability of laminated composites. The results are compared with those of the Monte Carlo simulation. Different composite laminates under different stress levels are considered for the failure probability investigation. The limit state functions and random variables have been determined based on the CDM model. Finally, the effects of the number of cycles, applied stress, and stacking sequence of the laminate on the reliability and fatigue life in fiber-reinforced laminated composites are assessed.

Journal

Acta Mechanica Solida Sinica – Springer Journals

Published: Mar 14, 2023

Keywords: Composite laminate; Continuum damage mechanics; Fatigue damage; First-order reliability method; Second-order reliability method; Monte Carlo simulation

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