Newton Raphson residual in composite structure analysis

Eashwar

I'm working in ANSYS , How software is calculating the Newton raphson residual force and convergence issue is coming . How to solve the convergence issue in my computer ? How Force convergence, Moment convergence , Displacement convergence and Rotation convergence criteria we can input to obtain convergence issue ?

Victor

You can set some convergence criteria using the *CONTROLS keyword for CCX. Add it in Mecway under CCX -> custom model definition.

But really you shouldn't touch that unless your problem really is special and probably models some extreme physical behavior. Almost always, convergence problems are due to modelling something that doesn't have a static solution such as unconstrained rigid body motion with contact, runaway plastic yielding, or buckling.