therotical answer and hyperworks ans not matching

Abhishek kalal
Abhishek kalal New Altair Community Member
edited October 2020 in Community Q&A

i have imported the .step file of 30*20 cross section solid in hyperworks optistrct my therotical stress value is 25 MPA and hyperworks showing tht 28 mpa

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited June 2020

    you should describe it better what you are doing. Just writting the results is impossible to anyone to guess what you're doing.

    If you could be more specific, you could get better answers here.

    Also, there's a topic specific for OptiStruct here.

    If you post it there, it would be more visible as well.

     

    You should start looking at your mesh refinement and element types used.

  • FaroukM
    FaroukM Altair Community Member
    edited June 2020
    Altair Forum User said:

    i have imported the .step file of 30*20 cross section solid in hyperworks optistrct my therotical stress value is 25 MPA and hyperworks showing tht 28 mpa

    Hi Kalal,

     

    As pointed by @Adriano A. Koga, It's a classic a problem when we use numerical methods to solve EDO ...

    You have to study the influence of the mesh (nbr of nodes for example) on the stress.

    The idea is find the optimal mesh which can approximate the reference solution within a reasonable computational cost.

     

    Cheers,

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