妖异的contour

whatinrain

昨天在workbench运行一个模型，重新evaluate value的时候出现了很妖异的contour，好像都变成了浮雕一样。不知道是为什么。

linuaries

会不会是显卡驱动异常？楼主，这个问题我倒还没有碰到过。

北极熊甲

有可能是shear locking or volumetric locking。
To alleviate this problem it is wise to choose elements with midside nodes or changing the element formulation.

Using the 18x series is highly recommended. These elements have five different forumulations available, B-Bar(default for low order elements), URI (default for highorder elements), Enhanced Strain, Simplified Enhanced Strain, andMixed u-P.

为减小volumetric locking consider using Mixed u-P formulation (where ‘u’ represents displacements
and ‘P’ represents hydrostatic stresses or pressures), so that hydrostatic pressures are calculated as a degree of freedom, rather than
being a derived quantity. You may also consider the other element formulations, with them each having pros and cons.

By: Professor F. E. Jargon

whatinrain

我在mesh的时候，shape checking选了standard mechanical， midside nodes选了program controlled，而且在solver output中确实都是18x类型（solid187，solid186）。
我想出现这种contour可能的情况是，结果文件存储的目录和其他结果文件混乱了。我有很多load conditions在一个模型中，都是static structural，所以存储的目录显示为static structural，static structural （2），static structural （3）... 极有可能workbench读了其他目录的结果文件，所以出现了这种图形。虽然不是很肯定，但是以前v10.0的时候即使不rename “static structural”也没有出现过这种错误。