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What is the different between setting group and Individual

Altair Forum User

I have trying the analysis of pretension

When I set the bolt pretension of group, some bolts stress will less than the other.

Here is my pretension one is about 6000 N, I have 20 bolts.

When I separate setting in a group and individual.

It will like that.

group individual

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OptiStruct

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Altair Forum User

Hi,

In group you are applying to a group of entities, right?

Altair Forum User

@Prakash Pagadala Thanks to your reply.

You said right.

Altair Forum User

Hi,

I think you are applying more pretension with the group and less with the individual.

Altair Forum User

@Prakash Pagadala Thanks to your apply.

Sorry I am late for the reply.

I want to ask in the OptiStruct if we set the total force in group, it will automatic to average?

Altair Forum User

I want to ask in the OptiStruct if we set the total force in group, it will automatic to average?

No, it takes on individual nodes.

Altair Forum User

@Prakash Pagadala Thanks for your reply.

But I have do the simple test, it will separate.

When I used this idea in full model it can't average.

Why?

Altair Forum User

HI,

I am sorry but did it average?

How is the pretension applied in both cases?

Altair Forum User

@Prakash Pagadala Thanks to your apply.

Because I see it contact force is the same so I think it is average.

At the other pretension I also use the total force to let it average to the other bolts.

Altair Forum User

Because I see it contact force is the same so I think it is average.

At the other pretension I also use the total force to let it average to the other bolts.

I will investigate on a sample model and will share the results.

Altair Forum User

@Prakash Pagadala Thanks you!

I will wait for your results.

Then I can solve my puzzle.

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