Topology optimization

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Topology optimization

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Dear friends,


I am student who needs information from experts. I need to set gravity
force (weight) of instance in topology optimization. Please help. It is for
my bacc. thesis. I tried to set gravity force but the problem is that
abaqus aborted optimization process. Also tried surface force with the same
amplitude to the gravity but the problem is that force is constant through
the whole process which is not true because some material gone.


Best regards.
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