c The patch test can be used to verify the output offinite e

(c) The patch test can be used to verify the output offinite element programs. Describe what the patch test is, how it is performed and why it works.

What is Patch Test?

Patch is basically how we connect the different nodes it may be triangular, quadilateral et cetera in 2-d and tetrahedral and prismatic in 3-d.

Patch test is the tool for element design and element verification.

Patch test is of following types:

How to perform Patch test?

Steps:

Build a Simple FE model.

Patch is provided to prevent rigid body motion.

Apply work-equivalent nodal load consistent with a state of constant stress to one or more boundary of patches.

Why its worked?

It worked in Computer program to check the convergence of patch test with actual FEM calculation. It provide the base for numerical applications.