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sudhanana

Fatigue optimization

Question

i am doing fatigue based optimization on automobile component can any one help me? what is is the procedure for that.

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16 answers to this question

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You can refer below tutorial of Optistruct.

OS-5070: Fatigue Optimization of a Torque Control Arm

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thanks rahul can i drop the simulation dec for you reference and idea?

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if possible attach that tutorial pdf for my reference if possible

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I got that tutorial but that is free shape optimization.but i want to perform topology based optimization. how to perform it.

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Hi Sudhanana,

 

What is your design objective and constraints. Maybe we can help you with if you provide the details.

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thanks praksh . i send my .fem file to u go through and get back.

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Hi Sudhanana,

 

I think your optimization setup is correct, Maybe you should need to play with the life/damage numbers to make it a feasible design.

The user can put a fatigue constraint on either life or damage tolerances. The user defines a minimum value (lower bound) in terms of Fatigue Life while a maximum value (Upper Bound) in terms of Damage.

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I cant understand the steps .could you set the condition and send back my mail 

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I followed some steps what ever you told but i am getting some errors in card definition.please check and tell.i transferring my .fem file for you reference. 

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Hi Sudhanana,

 

Your first deck is correct, You need to add fatigue constraint in DPTL card and not as a seperate response. 

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Hi Sudhanana,

 

DTPL card is the topology information card. You can input Fatigue constraints on DTPL through Topology>> Parameters>> Fatigue Constraints as shown in the image.

FatigueConstraint.PNG

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 I send my H3D file to u  i am not getting any optimized shape, what is the reason? .i created two responses that is life and volume.it is necessary ? but objective is minimize the volume . give your suggestions.

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Hi Sudhanana,

 

I did not received any file. But you can limit a constraint on volume fraction and use objective fuction as life to get a concept design

 

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