Hi
I am trying to simulate the impact of a rigid ball on an aluminum target both having solid elements (ELFORM = -1). Simulation looks good and gives desired results. However, there is one element that keeps on increasing in size without being deleted. I am attaching a picture of the same. I am unable to understand why only one element is causing this issue. I have tried changing ELFORM and hourglass parameters. But they don't seem to work out.
Any help to resolve this issue is appreciated. Thank you so much.
Eroding contact will give better results . Also sometimes , if your mesh is coarse , these kind of behavior arises. Try changing the contact algorithm with increased BSORT value .
Another tip if you are dealing with something like this, is you can use *Mat_add_erosion, reference the material that is having the element issue, and set a maximum strain threshold which will delete any elements that cross it. You can set something reasonable that will delete any elements with shooting nodes like you are showing.
@negativevolume I am already using this. There is another issue as well. The elements of the ball and plate are penetrating into each other. I am using eroding surface to surface contact and interior contact. I am also using Soft = 2 and depth =5, still facing the issue. If you have any suggestions to resolve this issue, it would be really helpful.
@pulkin It seems like your shooting node is caused by your ball and plate penetrating during contact. Try increasing your SFS, SFM for your eroding contact to 1.2 and adding damping VDC=20, add optional PENMAX=0.5.
You can also try these *control_contact parameters.
*CONTROL_CONTACT
$ SLSFAC RWPNAL ISLCHK SHLTHK PENOPT THKCHG ORIEN ENMASS
0.1 0.0 2 2 4 0 1 0
$ USRSTR USRFRC NSBCS INTERM XPENE SSTHK ECDT TIEDPRJ
0 0 0 0 4.0 0 0 0