impact on wheel

Altair Forum User
Altair Forum User
Altair Employee
edited November 2020 in Community Q&A

Hello, I am trying to make an analysis of wheel impact on the floor. During the analysis i faced zero volume tetra elements. Masses of the materials were upscaled to run the analysis faster (to be sure it works before letting it run for 9 hours). In my opinion small value in tetra collapse doesn't effect. I attached the model. Thanks in advance.

 

In addition, I searched through forum for the solution and didn't find anything helpful. (added dt/brick/cts, distance in rigid wall, istmr =2, increased thickness to shell elements, increased Gapmin )

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    update to the model:

     

    1) changed the direction of normals in contact.

    2) re meshed the tire to quad elements.

    3) changed surface of impact to rigid wall

    4) redefined contacts with type 7, slave =GRNOD, master =contact surf.

    5) checked for any penetration and intersection in the model.

     

    still getting warnings in interface and zero volume termination.

     

    i think i am still defining small strain formulation wrong. please help me find the issue.

     

    i attached all latest files.

    <?xml version="1.0" encoding="UTF-8"?>Capture.JPG

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  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    can you please check the boundary conditions and loading provided?. Somewhere a violation is there and please clear it to avoid incompatible kinematic conditions which is an undesired warning.

    please find the model with all penetrations cleared.

    <?xml version="1.0" encoding="UTF-8"?>SnapCrab_NoName_2016-4-22_20-8-25_No-00.png

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2016

    tnx it resolved the problem