摘要
本文在可压缩材料平面应变矩形上限元的基础上,提出了三角形单元,构造了其动可容速度场,导出了其上限功率计算式。应用上限元方法分析了可压缩材料平面应变挤压问题,并与致密材料进行了比较。
The triangular element of UBET is deyelopod based on the rectangular element for compressible material in plane strain and its kinematically admissible velocity field is constructed, from which expression of upper bound power is derived. The extrusion of compressible material in plane strain is analysed in use of UBET and compared to fully dense material.
关键词
上限元法
可压缩材料
平面应变
UBET
comprcssible material
plane strain
triangular element
