Thermo- mechanical optimization

Hi,

I am trying to run a test thermo-mechanical optimization on cuboidal component. I seem to get a weired results. materials are being removed from those places where stresses are high (maximum). Could someone go through the results and the model file and help me in understanding the mistake that i am obviously but unknowing committing? Thanks in advance.

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Rahul Rajan_21763

Can you try thermal complaince(tcomp) instead of weighted compliance in the current setup.

puneet.shahare

@Rahul R

As suggested, I have run the same setup for thermal compliance. This is the out message that I received.

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Rahul Rajan_21763

As per OptiStruct user guide, thermal compliance must be assigned to a linear steady state heat transfer subcase.Since you have Thermo mechanical optimization setup,you could also try min mass or volume, subject to stress constraint or displacement constraint.

puneet.shahare

@Rahul R

thanks for the reply. this is a test case, later on I will be optimizing desiel power train. It is not possible to assign stress and displacement constraint on that model. Anyway, the objective is to increase the stiffness by reducing the volume or weight by 80 to 70%. That is the reason I am trying out the test case in this way. is it not possible to assign weighted compliance to mechanical loadstep in thermo-mechanical analysis?

I am attaching the latest files of thermo-mechanical analysis for both weighted compliance and thermal compliance along with a ppt for better clarification.

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