LS Dyna

LS Dyna

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Necking in LS-DYNA

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    • August 26, 2025 at 3:20 pm
      valerio.incocciati
      Subscriber

      Good evening,

      I'm trying to characterize a polymeric material (POM) with 187 SAMP-1 material model. At the moment, Force-Displacement values from FEM are different from experimental ones. This because the simulations starts necking, and force values go down quicky.
      At the moment, I can not understand what makes the material necking and how can calibrate this phenomena (in exp. values, force goes down slowly).
      Can someone help me regarding how to handle with this issue? Thank you in advance.

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