基于多尺度方法的平纹机织SiC/SiC复合材料力学性能预测  

Prediction of Mechanical Properties Using Multi-scale Approach for Plain Woven SiC/SiC Composites

作　　者：胡元杰 陈绍雄 朱书华[1] 徐志胜 杨发建 HU Yuan-jie;CHEN Shao-xiong;ZHU Shu-hua(College of Aerospace Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016)

机构地区：[1]南京航空航天大学航空学院,南京210016

出　　处：《航空精密制造技术》2024年第3期13-19,共7页Aviation Precision Manufacturing Technology

基　　金：国家科技重大专项资助项目(Y2019-I-0018-0017)。

摘　　要：本文基于平纹机织SiC/SiC复合材料的多尺度特性以及微观结构的周期性,建立了微观尺度(纤维尺度)和中观尺度(纱线尺度)的单胞模型,利用Abaqus软件计算得出纤维尺度模型的力学性能参数,将这些参数导入纱线尺度模型中,同时编写相应的UMAT子程序来判断材料的损伤起始和损伤演化过程,模拟了平纹机织SiC/SiC复合材料在单向拉伸时的损伤演化以及破坏过程。结果表明X向拉伸应力应变曲线与试验曲线吻合良好,有效地预测了平纹机织SiC/SiC复合材料的强度性能和损伤演化过程。Based on the multi-scale characteristics and the periodicity of microstructure of plain woven SiC/SiC composites,the unit cell models of microscale(fiber-scale)and mesoscale(yarn-scale)are established.The mechanical properties parameters of the microscale model were calculated by Abaqus software,which were then introduced into the yarn-scale model.The corresponding UMAT subroutine was written to judge the damage initiation and damage evolution process of the material.The damage evolution and failure process of plain woven SiC/SiC composites under uniaxial tension were simulated.The results show that the X-direction tensile stress-strain curve is in good agreement with the experimental curve.The strength properties and damage evolution of plain woven SiC/SiC composites are predicted.

关 键 词：多尺度 平纹机织SiC/SiC复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]