Damage characterization and fatigue life prediction for CFRP laminates under biaxial fatigue loading

IF 6.8 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-10-02 DOI:10.1016/j.ijfatigue.2025.109316

Zelin Zha, Chao Zhang, Chongcong Tao, Fuqiang Wu, Jinhao Qiu, Weixing Yao

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引用次数: 0

Abstract

In this paper, the biaxial tension-shear fatigue experiment was performed on the carbon fiber reinforced polymer (CFRP) laminates using a modified Arcan fixture (MAF). The degradation of axial and shear stiffness of the laminate was measured with the digital image correlation (DIC) during the fatigue experiment. A novel energy-based damage variable was proposed, and the damage evolution model was established considering the effects of multiaxial stress states. The method for the determination of the model parameters was comprehensively discussed. Furthermore, damage evolution and the fatigue life of the CFRP laminates under tension-shear biaxial fatigue loading were predicted with the proposed fatigue damage model. Results show that the predicted damage evolution aligns well with the experimental data, and the fatigue life predictions fall within a 4-times scatter range, confirming the effectiveness of the proposed damage model and providing an insight into the analysis of composite materials under multiaxial fatigue loading.

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双轴疲劳载荷下CFRP复合材料损伤表征及疲劳寿命预测

采用改进的Arcan夹具（MAF）对碳纤维增强聚合物（CFRP）层合板进行了双轴拉伸-剪切疲劳试验。采用数字图像相关（DIC）技术测量了复合材料在疲劳试验过程中的轴向刚度和剪切刚度退化情况。提出了一种基于能量的损伤变量，建立了考虑多轴应力状态影响的损伤演化模型。全面讨论了模型参数的确定方法。利用所建立的疲劳损伤模型对CFRP复合材料在拉伸-剪切双轴疲劳载荷作用下的损伤演化和疲劳寿命进行了预测。结果表明，损伤演化预测与实验数据吻合良好，疲劳寿命预测在4倍散射范围内，证实了损伤模型的有效性，为复合材料在多轴疲劳载荷下的分析提供了新的思路。

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来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.