A simple buckle model,can be solved easily by using S&S,of course.
But if when the deformation come to self penetration,what will the S&S do？
We may need the contact sometimes.
I‘m not asking the S&S build a contact connection ...etc..It’s not the 'meshfree' idea.
I just wonder will the elements rebuilded in the linear tree ,when it happened.
Pls see the picture as below,(the original min distance =0.5mm)