铸造过程温度场／应力场双向耦合的数值模拟  

Numerical simulation of the casting process with coupled thermal and mechanical effects

作　　者：徐艳[1] 康进武[1] 黄天佑[1] 

机构地区：[1]清华大学机械工程系,先进成形制造教育部重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第5期769-772,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究项目(2005CB724105)

摘　　要：为研究铸造过程的温度场和应力场,提出模拟铸件铸造过程的FDM/FEM集成系统,使用接触单元处理铸件/铸型间的相互影响,并实现了温度场/应力场的相互作用。使用考虑应力/变形与温度双向耦合模拟方法对应力框试件进行模拟,并与实验结果进行对比。结果表明,使用热力双向耦合方法对铸件进行模拟得到的温度分布更接近实验结果。An integrated finite difference /finite element method system was developed to simulate the temperatures and stresses during casting, with a contact element method used to study the interaction between the sand mold and the casting and the interaction between the temperature and stress fields. The method includes the coupled stress/deformation and temperature effects and was used to simulate the casting of a stress frame. The simulations show that the temperature distributions are closer to the experimental results than those without the contact elements.

关 键 词：热应力 FEM/FDM集成系统 接触单元 界面热阻 

分 类 号：TG213[金属学及工艺—铸造]