unit of measure

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

Good morning

I wanted to ask what are the default unit of measurement in hypermesh, specifically unit of pressure and displacement.

Thanks in advance for assistance.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2016

    Generally the unit system which can be followed is : 

    Length: millimeter = mm

    Mass: tonne = tonne

    Time: second = s

    Pressure - MPa

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited May 2016

    Refer below post also.

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2016

    Be careful here.  As far as I know there is no 'default' unit system in HyperMesh.  It is up to the user to make sure a consistent unit system is being used throughout the model and simulation.  For mechanical simulations the base units are length, mass, and time.  Displacements from the simulation will be in the same units as length.  This could be millimeters, inches, feet, yards, miles, furlongs, etc.  Pressure is a derived unit involving length, mass, and time.  If length is millimeters, mass is tonnes, and time is seconds then pressure will be MPa.  Another common unit system (at least in automotive) is length in millimeters, mass in kilograms, and time in milliseconds.  In this case pressure is GPa.  The key is to make sure the derived units (force, moment, pressure, stress, to name a few) are consistent with the base units (length, mass, and time).

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2016

    Thank you so much for the answers.

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