I have modeled a concrete cylinder for compression test in ansys using concrete 65 element. I have modeled and done with the linear analysis. But when I am performing nonlinear analysis by taking M30 concrete nonlinear property; the result is non converging after taking a uniform pressure of 19 Mpa. At the last sub step after 19 Mpa pressure load the displacement is very high. Can anyone help me regarding this issue? I have attached my ansys apdl script file for reference.