nI watch the video provided. it was good, I tried to flip the target and contact bodies. I set tool as contact body, and the deformable body as target body, but the problem is not solved. (the sphere in between is 15000 pa, and surrounding part is 5000 pa, the tool is structural steel)nwith large deflection on, the model cannot converge, I have no idea why. here are some resultsnI first show the result that I did not turn on the large deflectionnthen I tried turn large deflection on, but it did not converge. I guess the meshes are not fine enough, so I used surface sizing to make surface finer mesh, but the result is similar. nI will plot residual force plots, nnresidual force plot, nnregards,nqdyuann