Reply To: “Excessive Thickness Change” Error in 2 way FSI

[Rahul]

Also, refer to innovationspace.ansys.com/courses/courses/topics-in-hyperelasticity-using-ansys-mechanical/lessons/how-to-handle-element-distortion-errors-in-hyperelastic-materials-lesson-3/ 

For certain two-way FSI coupled analyses, convergence instabilities can be addressed with System Coupling's Quasi-Newton solution stabilization and acceleration method. Improving Coupled Analysis Stability (ansys.com)