Investigation on fatigue behavior and failure mechanism of quasi-3D woven composites under combined high and low cycle fatigue

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL International Journal of Fatigue Pub Date : 2024-12-15 DOI:10.1016/j.ijfatigue.2024.108768

Shuang Qiu, Haitao Cui, Hongjian Zhang

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引用次数: 0

Abstract

This paper experimentally investigates the fatigue behavior and failure mechanism of a quasi-three-dimensional woven composite (Q3DWC) under combined high and low cycle fatigue loading (CCF) for the first time. In this study, to develop a composite with high tensile strength and sufficient delamination resistance, a Q3DWC structure is firstly designed. Then, a novel biaxial experimental platform, including the longitudinal tensile system, the lateral excitation system, and the dynamic signal monitoring system, is established. Based on this platform, a comprehensive analysis, including fatigue life, stiffness degradation, energy dissipation, and fracture morphology, is conducted. Results indicate that the superimposed high cycle fatigue (HCF) significantly reduces the fatigue life when compared to low cycle fatigue (LCF) life. Stiffness degradation and energy dissipation are obtained by hysteresis loops, showing that the entire fatigue process is mainly divided into three stages. Moreover, fracture morphologies are analyzed via scanning electron microscopy (SEM), indicating more severe fiber pull-out and fiber/matrix debonding due to the introduction of HCF vibration. Finally, the probable damage evolution under LCF and CCF loading is discussed separately. This study provides valuable references for the design and safe application of composites under CCF loading.

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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.