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LS Dyna

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Why am I getting unexpectedly low Factor of Safety for explicit dynamic analysis?

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    • October 25, 2021 at 2:42 pm
      c0ldf1re
      Subscriber

      I am a member of a college which takes part in BAJA SAE. In Static Structural analysis of the roll cage, I am getting a FOS of around 1.5 by using static loading conditions of 10G on the roll cage.

      In the dynamic analysis, I am getting a very low FOS of around 0.2. I have tried adding structural support, increasing weldment thickness, and other such things without obtaining a significant change in FOS.

      Have I done some common mistakes or errors?

      I have done 2D surface meshing by the way.

      Thanks in advance for any suggestions or help related to troubleshooting the issue. Also sorry if there is some obvious answer and I don't know it.

      Screenshot 2021-10-25 200747.png
    • October 29, 2021 at 4:05 pm
      Akshay Maniyar
      Ansys Employee

      Sorry for the delay. Can you explain more about the issue? Are you applying same loading in static and explicit? What is your purpose of doing same analysis in static and explicit?
      Also, how you have applied 10g load, as I can see you have applied displacement.
      Thanks amaniyar

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