- 积分
- 9
- 注册时间
- 2003-4-27
- 仿真币
-
- 最后登录
- 1970-1-1
|
发表于 2004-8-1 03:05:21
|
显示全部楼层
来自 美国
回复: 【求助】突然一个简单问题卡住我:塑性应变
1.我们知道塑性应变是不可逆的,一个物体,先发生+0.5应变,然后反向加载,发生-0.5应变,总应变是否为0?
is '先发生+0.5应变' the elastic strain? if yes, then '反向加载,发生-0.5应变' certainly has zero strain. if not, this means there is 'plastic strain'. supposed the plastic strain is 0.1. then unloading to zero force, the remaining strain is 0.1, in order to get addtional -0.1 strain, one has to applied force in opposite direction. after all, your total strain would be zero, but the force is not equal to zero anymore.
2.在锻造等材料成形过程中,由于坯料是经轧制等生成,是否开始有塑性变形。塑性变形(残余应力可以)是否可以通过时效处理消除?
hard to say. as you already knew, '塑性应变是不可逆的', then '塑性变形' can not 通过时效处理消除. |
评分
-
1
查看全部评分
-
|