Strange Deformation/Stress Location for Motor Mount

cweacwea Member Posts: 4
edited December 2020 in Structures

I have been trying to do a Static Structural and Topology Optimization simulations for a motor mount I am designing. However, there is a concentration of stress in a place that doesn't make sense to me. The load is a bearing load in the +z direction. There are two "dummy" bolts that connect some of the parts. Both ends (left and right) are fixed supports. I assumed the stress would be primarily concentrated in the middle bottom and at the ends near the supports. Is this simulation correct or do I have something set up incorrectly? Thank you for any insight.

I have been working on the student version of Ansys 2020 R2



Best Answers

  • peteroznewmanpeteroznewman Posts: 11,372Member
    Accepted Answer

    @cwea

    Insert a Contact Tool under the Connections folder then right click to Generate Initial Contact Results, then look at this table.

    The last row in white shows a penetration of 0.67558 mm on a Frictional contact. If you go to that contact, you can see the geometry.

    The stress at the top of the part is caused by the huge amount of interference in the geometry being resolved by the contact algorithm.

  • peteroznewmanpeteroznewman Posts: 11,372Member
    Accepted Answer

    @cwea

    There are three large penetrations listed. You have to fix all of them.

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