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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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挤压铸造凝固过程热--力耦合模拟I.数学模型及求解方法
, PP. 356-362
Keywords: 挤压铸造,热--力耦合,有限元方法,本构模型
Abstract:
开发了模拟挤压铸造凝固过程中铸件温度、应力及形状变化的有限元模型.该模型包括了凝固过程中潜热的释放和体积收缩效应、界面传热和变形的相互作用以及凝固壳在冲头压力下的变形等.应力场模拟中采用热弹粘塑性本构模型描述凝固壳的变形,并对液相和糊状区进行了特殊处理.利用接触算法处理铸件与模具界面,并且采用一种特殊的迭代法来模拟冲头的运动.该模型可以用来研究模具设计和工艺参数(如模具温度及冲头压力等)对铸件质量的影响.
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