各位有没有发现有deform模拟时坯料体积会减小
关于deform模拟想请教几个问题：1、deform锻压模拟时体积为什么会减少？是不是与某些默认参数有关？
2、如何防止这种情况出现？
3、deform在运行计算进有时为什么会中断而弹出内存错误提示对话框？
Causes of volume loss and their remedies include:
• Corner cutting during remeshing. This is characterized by large drops in volume at
remeshing steps. If elements around a relatively tight corner are too large, the portion of
the element which penetrates the corner will be lost on remeshing. This can be controlled
forcing a finer mesh in that region with mesh density windows, and by using the Maximum
Interference Depth remesh trigger.
• Excessive hydrostatic stress or too small a volume penalty constant. This is characterized
by a steep gradient in the volume curve betweenremeshings. Check that flow stress data
is using the correct units. For problems such as high ratio extrusion with extremely high
hydrostatic stress, it may be necessary to increase the volume penalty constant by an
order of magnitude or two. Increasing the penalty constant may lead to convergence
problems, so a balance must be struck.
• Volume compensation (PreprocessorObjectsProperties) can be used to control
volume loss during remeshing.
• Polygon substepping can be used to limit volume loss during simulation
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