LS Dyna

LS Dyna

Topics relate to LS-DYNA, Autodyn, Explicit STR and more

how to define a material with density that vary with position

    • stringinging cs
      Subscriber

      How can I define a material with mass density that vary with position in ls-dyna? Thank you.

       

       

    • Jim Day
      Ansys Employee
      See *LOAD_DENSITY_DEPTH. If that doesn't suffice, elaborate on your application and intent.
    • stringinging cs
      Subscriber

      Thanks, but the keyword *LOAD_DENSITY_DEPTH can only define the density vary with depth. can i define the density vary with the position more complex. For example, density varies with both the coordinates x, y, and z.

    • Jim Day
      Ansys Employee
      By using *INITIAL_STRESS_SOLID, you can set the initial state of each element. That would include stresses and optionally material history variables and/or initial volume (IVEFLG=1). I haven't tested this approach but perhaps the initial density can be manipulated via the initial volume.
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