考虑湿热老化的单向纤维增强复合材料纵向脱黏行为的数值模拟

doi:10.19936/j.cnki.2096-8000.20250228.007

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (2): 46-53.DOI: 10.19936/j.cnki.2096-8000.20250228.007

考虑湿热老化的单向纤维增强复合材料纵向脱黏行为的数值模拟

伊文昭¹, 刘璐璐^1*, 徐凯龙², 陈伟¹

1.南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室,南京 210016;
2.河海大学力学与材料学院,南京 211100

收稿日期:2023-11-06 出版日期:2025-02-28 发布日期:2025-03-25
通讯作者: 刘璐璐(1988—),女,博士,研究员,博士生导师,研究方向为航空发动机结构冲击动力学,liululu@nuaa.edu.cn。
作者简介:伊文昭(1999—),男,硕士研究生,研究方向为复合材料力学。
基金资助:
国家自然科学基金(51975279);航空科学基金(201941052001)

Numerical simulation of longitudinal debonding behavior in unidirectional fibre-reinforced composites considering hygrothermal treatment

YI Wenzhao¹, LIU Lulu^1*, XU Kailong², CHEN Wei¹

1. Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. College of Mechanics and Materials, Hohai University, Nanjing 211100, China

Received:2023-11-06 Online:2025-02-28 Published:2025-03-25

摘要/Abstract

摘要： 通过ABAQUS计算软件对干态和湿热老化后的断裂纤维尖端周围的纵向脱黏行为进行研究。提出双线性牵引-分离定律与库仑滑动摩擦定律耦合来建立纤维/基体界面本构模型。结果表明:树脂的塑性性能和应变软化效应对界面脱黏行为同样有很大的影响,通常树脂应变软化效应越好,界面处越难脱黏;湿热老化使界面的性能下降,导致界面更低的应力传递能力,加快了界面剥离,产生更长的脱黏区域;湿热老化降低了相邻纤维上的最大应力集中系数(SCF),证实了差的界面在应力传递方面效率低下。干态下,高的应力集中系数往往会导致相邻纤维更容易发生断裂,纤维断裂快速扩展。该研究为更好地理解各种力学性能参数对纤维/基体界面的纵向脱黏行为以及湿热对单向CFRP纵向拉伸破坏的影响提供了依据。

关键词: 纤维/基体界面, 微观力学, 湿热老化, 脱黏行为, 应力集中系数, 有限元分析, 复合材料

Abstract: The longitudinal debonding behavior around the broken fiber tip before and after hygrothermal treatment were studied by ABAQUS calculation software. The interface constitutive model of fiber and matrix is simulated by coupling the bilinear traction-separation law with Coulomb sliding friction law. The results show that the plastic properties and strain softening effect of resin also have a great influence on the interfacial debonding behavior. Generally, the better the strain softening effect of resin is, the more difficult the interface debonding; hygrothermal treatment degrades the interface performance, leads to lower stress transfer capacity, accelerates the interface stripping and produces a longer debonding zone. Hygrothermal treatment reduces the maximum SCF on adjacent fibers, confirming that poor interfaces are inefficient in stress transfer. High SCF in dry state often leads to the fracture of adjacent fibers more easily, resulting in rapid expansion of fiber fracture. This study provides assistance for a better understanding of the effect of mechanical properties on the behavior of interfaces and the effect of hygrothermal treatment on the longitudinal tensile failure of unidirectional composites.

Key words: the fiber/matrix interface, micromechanics, hygrothermal treatment, debonding behavior, stress concentration factors, finite element analysis (FEA), composites

中图分类号:

TB332

伊文昭, 刘璐璐, 徐凯龙, 陈伟. 考虑湿热老化的单向纤维增强复合材料纵向脱黏行为的数值模拟[J]. 复合材料科学与工程, 2025, 0(2): 46-53.

YI Wenzhao, LIU Lulu, XU Kailong, CHEN Wei. Numerical simulation of longitudinal debonding behavior in unidirectional fibre-reinforced composites considering hygrothermal treatment[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(2): 46-53.

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考虑湿热老化的单向纤维增强复合材料纵向脱黏行为的数值模拟

Numerical simulation of longitudinal debonding behavior in unidirectional fibre-reinforced composites considering hygrothermal treatment

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