Pages

Showing posts with label matrix. Show all posts
Showing posts with label matrix. Show all posts

June 22, 2013

Matrix Methods: Direct vs. Iterative

Direct vs. Iterative methods
The two approaches available for solving global stiffness matrix (K) in FEM are:
Implications on FEA solver
  • For linear simulation e.g. KU = f , Gaussian elimination can be applied directly
  • For nonlinear simulation e.g. K(u)U=f, stiffness is dependent on displacements (u). Therefore an iterative method must be used.