In Hyperworks, If I put the elasticity modulus of a material in (MPa), the Von mises stress will be in (MPa) too? I want to manage what unit is in every result, but i´`` am afraid thats not possible

Guilherme Arruda
Guilherme Arruda Altair Community Member
edited August 2021 in Community Q&A

This simulation is in Hyperworks and i´m using the Opitscrut as a solver

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Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited July 2021

    Hi @Guilherme Arruda 

     

    HyperWorks doesn't have a default unit system. The user chooses his own unit system.

    Just be sure that you use the same system along the entire model/simulation.

    So, in your case, if E is in MPa, and your model dimensions are in mm, yes, all your stress results will be in MPa.

    Follow the consistent units.

    Take a look at this post, for example:

    https://community.altair.com/community?id=community_question&sys_id=9d464c761b2bd0908017dc61ec4bcb1b

  • Guilherme Arruda
    Guilherme Arruda Altair Community Member
    edited August 2021
    Adriano A. Koga_21884 said:

    Hi @Guilherme Arruda 

     

    HyperWorks doesn't have a default unit system. The user chooses his own unit system.

    Just be sure that you use the same system along the entire model/simulation.

    So, in your case, if E is in MPa, and your model dimensions are in mm, yes, all your stress results will be in MPa.

    Follow the consistent units.

    Take a look at this post, for example:

    https://community.altair.com/community?id=community_question&sys_id=9d464c761b2bd0908017dc61ec4bcb1b

    Hi Adriano, I have another doubt with the units.

    For exemple, the unit of force is Newton or it depends on the unit of 

    length? In my simulation, the unit of lenght is mm, so the unit of force will be 1000 Newton?

    thank you for the help
  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited August 2021
    Guilherme Arruda said:

    Hi Adriano, I have another doubt with the units.

    For exemple, the unit of force is Newton or it depends on the unit of 

    length? In my simulation, the unit of lenght is mm, so the unit of force will be 1000 Newton?

    thank you for the help

    Use consistent units and you will be fine.

     

    if your geometry unit is in mm, your force input is in N, then your stresses will be in N/mm2 = MPa.

    Your Young's modulus need to be inputed in MPa as well, so for steel, around 210 000MPa.

    Density could be in ton/mm3.

     

    Inputs are length, force, mass. All the rest should be given accordingly.

     

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