三维机织复合材料压缩渐进损伤分析与失效机理  

Compression failure mechanism and progressive damage analysis of 3D woven composites

作　　者：郭秀梅 王坤[1] 张楠[1] 李超 周光明[1] GUO Xiumei;WANG Kun;ZHANG Nan;LI Chao;ZHOU Guangming(State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Nanjing Fiberglass Research and Design Institute Co.,Ltd.,Sinoma Science&Technology Co.,Ltd.,Nanjing 210012,China)

机构地区：[1]南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016 [2]中材科技股份有限公司南京玻璃纤维研究设计院,南京210012

出　　处：《复合材料科学与工程》2024年第12期126-133,共8页Composites Science and Engineering

摘　　要：采用试验与仿真相结合的方法对三维机织复合材料在压缩载荷下的渐进损伤及失效模式进行了分析。通过对材料开展经纬向压缩试验,获得其应力-应变曲线,并基于材料的细观表征建立细观有限元单胞模型来模拟其应力-应变响应及损伤机理。仿真和试验的对比结果表明,有限元模拟结果与试验结果吻合较好。与沿经向相比,材料沿纬向的压缩模量和强度均更高;纬向压缩载荷下,三维机织复合材料失效的主要原因为纬纱的压溃断裂与基体的开裂;经向压缩载荷下,经纱是弯曲纱,对基体及纬纱产生挤压作用,从而容易导致纱线之间的基体压溃,产生分层开裂。A combination of experiment and simulation was used to study the progressive damage and failure modes of 3D woven composites.The stress-strain curves of the material were obtained through the warp and weft compression test.Based on the microscopic characterization of the material,the microscopic finite element cell model was established to simulate the stress-strain response and damage mechanism.Through the comparison of simulation and experiment,it is considered that the simulation results agree well with the test results.The compressive modulus and strength of the material along the weft are higher than those along the warp.Under the weft compressive load,the main reasons for the failure of the 3D woven composite material are the crushing fracture of weft yarns and the cracking of the matrix.Under warp compressive load,warp yarns are curved yarns,which extrude the matrix and weft yarns,which easily lead to the crushing of the matrix between the yarns and produces delamination cracking.

关 键 词：三维机织复合材料 压缩性能 有限元模拟 渐进损伤分析 

分 类 号：TB332[一般工业技术—材料科学与工程]