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How to simulate a wall without using Contact?

Posted 2020年2月26日 GMT-5 09:36 Structural Mechanics Version 5.5 1 Reply

Andreas
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Is there a way to simulate a wall without using the contact-node? I don't want my geometry to deform past a certain boundary. (which is horizontal, if that helps...)

regards and thank you

1 Reply Last Post 2020年2月28日 GMT-5 06:58
Andreas
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Posted: 5 years ago 2020年2月28日 GMT-5 06:58
Updated: 5 years ago 2020年2月28日 GMT-5 07:08

I found a way by defining a prescribed displacement with the diagonal H-vector being set at 0;0 for the upper and 0;1*(y>y_wall) for the lower row. this way, the only constraint is in positive y-direction when y>y_wall is true.

it works for parts of the boundary with limited mechanical stress (left in picture), but seems to have problems when stresses get higher. (right in picture) Is it possible that the deflections due to mechanical stress are greater than what the solver can correct? I tried to reduce the maximum step contraint, but it has not changed anything.

I found a way by defining a prescribed displacement with the diagonal H-vector being set at 0;0 for the upper and 0;1*(y>y_wall) for the lower row. this way, the only constraint is in positive y-direction when y>y_wall is true. it works for parts of the boundary with limited mechanical stress (left in picture), but seems to have problems when stresses get higher. (right in picture) Is it possible that the deflections due to mechanical stress are greater than what the solver can correct? I tried to reduce the maximum step contraint, but it has not changed anything.

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