摘要
通过建立有限差分/有限元集成应力分析系统,模拟了镁合金压铸用模具在压铸过程承受的应力场和变形。首先采用有限差分法模拟压铸系统的三维温度场,然后利用温度载荷转换接口将温度载荷转换到模拟对象有限元模型,再计算应力场和变形。应力计算中能够处理压铸过程的合模和开模过程中的边界约束条件变化。通过分析模具在合模过程及开模时刻的应力变化和变形趋势,对铸件尺寸精确度进行了预测,对压铸过程工艺参数的优化提出了见解。
The thermal stress and strain field of magnesium die casting dies during casting process has been simulated through the integrated FDM/FEM software package. First the changing three dimensional temperature fields of the casting system were calculated by FDM software. Then the simulated results were transferred to the FEM model to calculate the thermal stress and strain field. The opening and closing action of dies during the casting process that will change the interface restraint conditions was also considered. The stress and strain of the dies have been analyzed to predict the dimensional accuracy of castings and optimize the casting parameters.
出处
《铸造》
CAS
CSCD
北大核心
2004年第6期465-468,共4页
Foundry
基金
国家863项目子课题(2001AA331030 04)
国家自然科学基金项目(041301107)。
关键词
压铸
镁合金
应力场
变形
die casting
magnesium alloy
stress field
distortion
