钨纤维增强块体非晶复合材料压缩变形的有限元分析  

Finite Element Analysis of Compressive Deformation of Tungsten Fiber Reinforced Bulk Metallic Glass Composites

作　　者：张平[1] 李乡安[1] 龙志林[1] 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2009年第2期44-50,共7页Natural Science Journal of Xiangtan University

基　　金：湖南省教育厅资助项目(07A071)

摘　　要：分别使用Drucker-Prager和von Mises屈服准则研究了钨纤维增强块体金属玻璃基的压缩变形行为及热残余应力的分布,有限元计算结果表明:在压缩过程中钨纤维相先屈服后将载荷传递给块体金属玻璃相;钨纤维相的轴向热残余应力高达-500 MPa;钨纤维相在遵循von Mises屈服准则的情况下,Drucker-Prager屈服准则比von Mises屈服准则更能描述块体金属玻璃相早期的压缩屈服行为.Finite element analysis was conducted on four tungsten fiber reinforced bulk metallic glass ma- trix composites using Drucker-Prager and yon Mises yield criterion. It was shown that the fibers yield first and then transfer load to the matrix. It was discovered that the maximum axial thermal residual stress can exceed --500 MPa and the matrix phases were seen to more approximately obey Drucker-Prager yield crite- rion than the yon Mises yield criterion .

关 键 词：块体非晶复合材料 有限元 压缩变形 屈服准则 

分 类 号：TU12[建筑科学—建筑理论] TU52