Contact problem

- September 13, 2022 at 7:10 pm
  
  Mahmoud_87
  Subscriber
  
  Dear All,
  I have a master case study as shown in for plate forming under dei progressed by LS DYNA, and I setup the contact as shown in the following Figure, but unfortunatly the two parts don't contact each other. The forming dei penetrate the plate.
- September 20, 2022 at 2:05 pm
  
  Andreas Koutras
  Ansys Employee
  
  Hello,
  Is the thickness of the metal sheet shells very small? A small shell thickness can cause the contact to be released before expected. You can try to increase the contact stiffness by setting SOFT=1 in the *CONTACT optional card A, set the scale factors SFS and SMF to a low value (such as 1e-12), and increase the SOFSCL to 0.4. Otherwise, try with the segment-based contact invoked by SOFT=2. Details are available in the LS-DYNA Theory Manual under Section 29.7.
  Note that AUTOMATIC contacts account by default for the shell thickness offset.
  Contact examples are available here:
  https://www.dynaexamples.com/introduction/examples-manual/contact
  Regards,
  AK