一种韧性断裂准则中材料常数的计算模型及其应用

被引:10
|
作者
郎利辉
杨希英
刘康宁
蔡高参
郭禅
机构
[1] 北京航空航天大学机械工程及自动化学院
关键词
充液热成形; 韧性断裂; M-K模型; 材料常数; 数值模拟;
D O I
暂无
中图分类号
V250 [一般性问题];
学科分类号
摘要
为确定符合板材变形规律的韧性断裂准则中的材料常数,基于传统M-K模型框架并进行修正,结合单向拉伸和平面应变试验数据,提出一种新的韧性断裂准则材料常数计算模型。利用MATLAB软件编写该计算模型的算法程序,得到应用于铝镁合金5A06-O板材的不同韧性断裂准则材料常数。同时将C&L韧性断裂准则嵌入Abaqus/Explicit显示模块的用户材料子程序VUMAT。在200℃的条件下,对铝镁合金5A06-O板材在热介质胀形和充液热拉深中的断裂行为进行数值模拟,并与相同工艺参数下的试验所得结果作对比。结果表明,热介质胀形高度误差为6.2%,充液热拉深深度误差为8.5%,验证了韧性断裂准则材料常数计算模型的正确性,表明了C&L韧性断裂准则在板材充液热成形中的适用性。
引用
收藏
页码:672 / 679
页数:8
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