Ansys Employee
From the sudden drop in force around displacement=1.5 it seems that the contact interface might haven broken down. In that *CONTACT definition, set SOFT=1 in Optional Card A , and SFS=SFM=1.e-9 on Mandatory Card 3. If the behavior does not improve, set SOFT=2, SBOPT=3 and DEPTH=35 on Optional Card A, and SFS=SFM=0 on Card 3.n