Fatigue life prediction method of carbon fiber-reinforced composites

IF 3.2 3区化学 Q2 POLYMER SCIENCE

e-Polymers Pub Date : 2024-05-30 DOI:10.1515/epoly-2023-0150

Jiamei Lai, Yousheng Xia, Zhichao Huang, Bangxiong Liu, Mingzhi Mo, Jiren Yu

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Abstract

The use of composite laminates is characterized by problems such as poor inter-layer bonding and susceptibility of material properties to fatigue cracking, which seriously threaten structural safety. Research on fatigue damage characteristics and fatigue life prediction of fiber-reinforced composites can help to solve such problems. Carbon fiber-reinforced epoxy resin matrix composite laminates are taken as the object of this study. By analyzing the fatigue failure process and the fatigue failure micromorphology of the specimen, the primary damage forms and fatigue damage characteristics of its fatigue failure were obtained. The fatigue failure process of fiber-reinforced composites was simulated using finite element analysis software ABAQUS and its UMAT subroutine function. The tensile–tensile fatigue damage characteristics and failure mechanism of fiber-reinforced composites were studied, and the fatigue life of the composites was predicted. The feasibility of this life prediction method was verified by comparing it with experimentally obtained damage processes and fatigue lives. This intuitive and reliable life prediction method has good research potential for predicting the fatigue limit of fiber-reinforced composites.

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碳纤维增强复合材料的疲劳寿命预测方法

复合材料层压板在使用过程中存在层间结合力差、材料性能易受疲劳开裂影响等问题，严重威胁结构安全。研究纤维增强复合材料的疲劳损伤特性和疲劳寿命预测有助于解决这些问题。本研究以碳纤维增强环氧树脂基复合材料层压板为对象。通过分析试样的疲劳破坏过程和疲劳破坏微观形貌，获得了其疲劳破坏的主要损伤形式和疲劳损伤特征。利用有限元分析软件 ABAQUS 及其 UMAT 子程序功能模拟了纤维增强复合材料的疲劳破坏过程。研究了纤维增强复合材料的拉伸-拉伸疲劳损伤特征和失效机理，并预测了复合材料的疲劳寿命。通过与实验获得的损伤过程和疲劳寿命进行比较，验证了这种寿命预测方法的可行性。这种直观可靠的寿命预测方法在预测纤维增强复合材料的疲劳极限方面具有良好的研究潜力。

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来源期刊

e-Polymers 化学-高分子科学

CiteScore

5.90

自引率

10.80%

发文量

审稿时长

6.4 months

期刊介绍： e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.