24小时热门版块排行榜

>论坛更新日志 (3600)
>虫友互识 (509)
>文献求助 (411)
>导师招生 (300)
>硕博家园 (186)
>招聘信息布告栏 (181)
>博后之家 (130)
>休闲灌水 (123)
>论文投稿 (108)
>考博 (88)
>基金申请 (72)
>教师之家 (71)
>考研 (49)
>论文道贺祈福 (48)
>找工作 (46)
>金融投资 (44)

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

几里桐夏

新虫 (初入文坛)

应助: 0 (幼儿园)
金币: 84
帖子: 20
在线: 4.6小时
虫号: 5295331
注册: 2016-11-29
性别: GG
专业: 制造系统与自动化

[交流] marc做超塑成形分析时出错已有1人参与

用marc2010做一个0.1mm厚的薄材的超塑成形，用的是TA15材料，为什么一提交认真就会报错退出计算，有大神知道怎么设置吗？附上退出信息，谢谢了！The determinant of the stiffness matrix becomes zero or negative when indicated node has been reached during the Gaussian elimination phase of the solution process. This means that the stiffness matrix is non-positive definite. If this happens at the start of the analysis. the condition is usually casued by the existence of rigid body modes. It may also be caused by incorrect material properties (e.g. Poisson's raitio greater tharn 0.5; note that such situations may arise through temperature dependence of properties). In nonlinear cases. the structure may have buckled or reached a plastic limit load. In rubber analysis. it may also be due to the strain state being in n region where the input date for the strain energy function is invalid. In contact analysis with friction. Iack of normal forces may result in friction being absent. If desired. the program may be forced to continue by use of the parameter PRINT or the model or history definition option CONTROL. Either one of these procedures may be used for restart. whenever a non-positive definite situation occurs one must exercise caution. as the resultant numerical solution may be infeasible.

发自小木虫Android客户端

回复此楼