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.

Ansys Innovation Space

FREE STUDENT SOFTWARE

Issue with Selective Mass Scaling

- March 31, 2025 at 1:23 pm
  
  bhuhanptl3
  Subscriber
  
  Hello All,
  
  I am trying to perform a dyanmic crash simulation in LSDYNA.
  
  In the FE Model I have a part with two mesh sizes,
  Size 1: with 3mm + 1mm(at thin areas) and Size 2: with 1mm mesh. Both are tetra meshed.
  
  With my current timestep of E-4 the part was having huge mass addition that is why I decided to add the part in the SMS set but when I try to run the simulation,
  with Size 1: I get out-of-range forces at a location which is far from the part in question.
  and with Size 2: the simulation does not run at all. It's stuck before calculation go to the transient phase.
  
  Did anyone face similar issues? Any suggestions are greatly appreciated.
  
  Thank You.
- April 8, 2025 at 11:31 am
  
  Raman Babu
  Ansys Employee
  
  I believe these issues are occurring due to the addition of excessive mass.
  To ensure the feasibility of results, the added mass should not exceed 5%.
  Regards,
  Raman Babu

Viewing 1 reply thread

You must be logged in to reply to this topic.