单向碳纤维复合材料轴向压缩破坏的数值模拟  

Performance Characterization of Unidirectional Carbon Fiber Composites under Axial Compression

作　　者：刘立鹏 严实[1] 武靖书 马壮 张博雅 吴海瑞 邵颖峰[3] LIU Lipeng;YAN Shi;WU Jingshu;MA Zhuang;ZHANG Boya;WU Hairui;SHAO Yingfeng(Harbin University of Science and Technology,Harbin 150000,China;Aerospace Materials and Technology Research Institute,Beijing,100076,China;Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]哈尔滨理工大学,哈尔滨150000 [2]航天材料及工艺研究所,北京100076 [3]中国科学院力学研究所,北京100190

出　　处：《强度与环境》2024年第6期33-41,共9页Structure & Environment Engineering

基　　金：国家自然科学基金(12232019);中国科学院战略重点研究计划(XDB0620101)。

摘　　要：通过试验及模拟对单向碳纤维增强聚合物复合材料(UD-CFRP)的轴向压缩失效行为进行了研究,采用有限元软件ABAQUS构建了含纤维初始偏角缺陷的二维有限元模型。分别引入了纤维和基体的拉压失效不对称及界面的失效准则;系统研究了纤维、基体和界面性能,纤维初始偏角及纤维直径等各项参数对UD-CFRP抗压强度的影响。结果表明复合材料轴向压缩强度主要是由纤维初始偏角,基体和界面剪切强度共同作用的结果,其随着纤维初始偏角幅值的减小、基体和界面剪切强度的增加而增加。此外,结合纤维拉压失效不对称本文还研究了压缩失效后UD-CFRP的扭折带角度,模拟结果与试验结果相吻合。本工作较为完善地预测了UD-CFRP的轴向压缩破坏,可为先进复合材料的优化设计提供借鉴。The axial compression failure behavior of unidirectional carbon fiber-reinforced polymer composites(UD-CFRP)was investigated through experimental and simulation approaches.A two-dimensional finite element model containing initial fiber misalignment defects was constructed using the finite element software ABAQUS.The model incorporated the tension-compression asymmetry of the fiber and matrix as well as interface failure criteria;A systematic study was conducted on the effects of various parameters,including fiber,matrix,and interface properties,initial fiber misalignment,and fiber diameter,on the compressive strength of UD-CFRP.The results indicate that the axial compressive strength of the composite is primarily determined by the combined effects of initial fiber misalignment,matrix,and interface shear strength.The compressive strength increases with decreasing initial fiber misalignment and increasing matrix and interface shear strength.Additionally,combined with the asymmetric failure of fiber under tension and compression,this paper also studied the kink band angle of UD-CFRP after compression failure,and the simulation results were in good agreement with experimental findings.This work provides a comprehensive prediction of the axial compressive failure of UD-CFRP,offering valuable insights for the optimized design of advanced composite materials.

关 键 词：碳纤维复合材料 初始位错 轴向压缩 扭折带角度 

分 类 号：V258[一般工业技术—材料科学与工程] TQ176.7[航空宇航科学与技术—航空宇航制造工程]