求助3D公母扣螺纹旋钮分析

sweetboy9063

这个我也正在做呢，但是求解感觉比较困难。不知同仁都怎么做的，望指教。

蓝宝儿

sweetboy9063 发表于 2013-8-11 21:57
这个我也正在做呢，但是求解感觉比较困难。不知同仁都怎么做的，望指教。 ...

我现在基本不做了。做过一阵儿，划分网格太恼火了，想了很多办法，还是行不通，后来就放弃了。请问朋友你，做的怎么样，进行到什么程度了？

hanshikai

参考一下吧，画四面体网格，六面体确实不好画。

sweetboy9063

提问：我的模型第一次是在hm中建立的模型，并且用其进行了接触的定义，直接导入aba中进行计算，载荷步为0.05，计算成功了。但是螺纹旋合部位的应力场分布不太合理，不连续。
**
** INTERACTION PROPERTIES
**
*Surface Interaction, name=PROPER2
1.,
*Friction, rough
*Surface Behavior, pressure-overclosure=HARD
*Surface Interaction, name=PROPERCONTACT1
1.,
*Friction, slip tolerance=0.005, exponential decay
0.25, 0.2, 1.5
*Surface Behavior, no separation, pressure-overclosure=HARD
**
** BOUNDARY CONDITIONS
**
** Name: Disp-BC-1 Type: Displacement/Rotation
*Boundary
_M11, 1, 1
_M11, 2, 2
_M11, 3, 3
**
** INTERACTIONS
**
** Interaction: PROPER2-1
*Contact Pair, interaction=PROPER2, small sliding, type=SURFACE TO SURFACE
TARGET3, MASTER3
** Interaction: PROPERCONTACT1-1
*Contact Pair, interaction=PROPERCONTACT1, type=SURFACE TO SURFACE
TARGET1, MASTER1
** Interaction: PROPERCONTACT1-2
*Contact Pair, interaction=PROPERCONTACT1, type=SURFACE TO SURFACE
TARGET2, MASTER2
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, nlgeom=YES, inc=2000
*Static
0.05, 1., 1e-06, 0.05
**
** LOADS
**
** Name: CFORCE-1   Type: Moment
*Cload
_M12, 4, -500.
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT, frequency=10
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step

后来试图将载荷步缩小，可是怎么也算不成功，请明白的人指点。谢谢！
如下
**
** INTERACTION PROPERTIES
**
*Surface Interaction, name=PROPER2
1.,
*Friction, slip tolerance=0.005, exponential decay
0.2, 0.15, 1.5
*Surface Behavior, no separation, pressure-overclosure=HARD
*Surface Interaction, name=PROPERCONTACT1
1.,
*Friction, slip tolerance=0.005, exponential decay
0.2, 0.15, 1.5
*Surface Behavior, pressure-overclosure=HARD
**
** CONTACT INITIALIZATION DATA
**
*Contact Initialization Data, name=CInit-1
**
** BOUNDARY CONDITIONS
**
** Name: Disp-BC-1 Type: Displacement/Rotation
*Boundary
_M11, 1, 1
_M11, 2, 2
_M11, 3, 3
**
** INTERACTIONS
**
** Interaction: PROPER2-1
*Contact Pair, interaction=PROPER2, small sliding, type=SURFACE TO SURFACE, adjust=0.0
TARGET3, MASTER3
** Interaction: PROPERCONTACT1-1
*Contact Pair, interaction=PROPERCONTACT1, type=SURFACE TO SURFACE, tracking=STATE, adjust=0.0
TARGET1, MASTER1
** Interaction: PROPERCONTACT1-2
*Contact Pair, interaction=PROPERCONTACT1, small sliding, type=SURFACE TO SURFACE, adjust=0.0
TARGET2, MASTER2
** ----------------------------------------------------------------
**
** STEP: Step-1
**
*Step, name=Step-1, nlgeom=YES, inc=8000
*Static, stabilize=0.0002, allsdtol=0.05, continue=NO
0.03, 1., 1e-10, 0.03
**
** LOADS
**
** Name: CFORCE-1   Type: Moment
*Cload
_M12, 4, -500.
**
** OUTPUT REQUESTS
**
*Restart, write, frequency=0
**
** FIELD OUTPUT: F-Output-1
**
*Output, field, variable=PRESELECT, frequency=10
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step

这些关于接触的定义，到底哪里出错了，请高人指点。谢谢

xinhaihaohan

hanshikai 发表于 2013-7-24 21:31
提个建议，最好在HM里面画网格。
我已经在师兄的指导下用ABQ画上了全六面体的网格，但是后续的处理却因为 ...

请问你在aba里如何画六面体网格，是通过分割还是把本体、螺纹分开建模？

xinhaihaohan

hanshikai 发表于 2013-8-9 09:48
没有参考资料哇，当时是在师兄指导下完成的。后来经过自己反复琢磨修改才画出了理想的网格，我现在这里勉 ...

你好，是用延伸面切割还是？

努力的小强

你好，我也在做螺栓和螺母旋转，螺母施加扭矩怎么加的，谢谢！