We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
General Mechanical

General Mechanical

Topics related to Mechanical Enterprise, Motion, Additive Print and more.
  1. All Channels
  2. General Mechanical
  3. USERMAT Variables not clear

USERMAT Variables not clear

TAGGED: ,

    • September 23, 2022 at 1:39 pm
      Janot Lubritz
      Subscriber

      Hey Guys!

      I'm trying to modify a USERMAT and it's going pretty well but even though I checked all manuals and .pdf files I could find I can't get a clue about some of the variables. For instance I do not understand what "sigi" is and it's not described anywhere (I would think sigma at substep i but I'm not sure). Another one is "G" as well as "TWOG" and so on. I first thought that G is the shear modulus but thats "tsstiff". Furthermore "G" is an occupied variable that is never declared and does not get passed over. Where does it come from and what is it?

       

      Thank you so much in advance!

    • September 26, 2022 at 12:23 pm
      David Weed
      Ansys Employee

      Hello, 'sigi' is the stress at the integration points (see the get_ElmData function usage at line 813). 'G' is the shear modulus (see line 1871) and 'TWOG' is twice the shear modulus (see line 734).

Viewing 1 reply thread
  • The topic ‘USERMAT Variables not clear’ is closed to new replies.
Ansys Innovation Space

© 2025 Copyright ANSYS, Inc. All rights reserved.

Ansys does not support the usage of unauthorized Ansys software. Please visit www.ansys.com to obtain an official distribution.