复合材料科学与工程Issue(2)：46-53,8.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
Numerical simulation of longitudinal debonding behavior in unidirectional fibre-reinforced composites considering hygrothermal treatment
摘要
Abstract
The longitudinal debonding behavior around the broken fiber tip before and after hygrothermal treat-ment 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.Gen-erally,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 strip-ping 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 treat-ment on the longitudinal tensile failure of unidirectional composites.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Key words
the fiber/matrix interface/micromechanics/hygrothermal treatment/debonding behavior/stress concentration factors/finite element analysis(FEA)/composites分类
通用工业技术引用本文复制引用
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,(2):46-53,8.基金项目
国家自然科学基金(51975279) （51975279）
航空科学基金(201941052001) （201941052001）
