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
胡元杰 1陈绍雄 1朱书华 1徐志胜 1杨发建1
作者信息
- 1. 南京航空航天大学 航空学院,南京 210016
- 折叠
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.
Abstract
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Key words
multi-scale/plain woven SiC/SiC composites/mechanical property引用本文复制引用
基金项目
国家科技重大专项(Y2019-I-0018-0017)
出版年
2024
NETL
NSTL
万方数据