How to calculate laplacian term in VUMAT?

I am trying to solve the following equation in VUMAT dT/dt = P*Laplacian(T) + Q* dR/dt where Laplacian(T)=d^2(T)/(dx)^2 + d^2(T)/(dy)^2+ d^2(T)/(dz)^2 Is anyone has experience in solving this kind...

12 December 2016 4,575 2 View