STRESS

Calculate elastic stresses.

SYNOPSIS

stress [ temp1=n temp2=n ] [ nel=n ]

The stress command allows the user to calculate stresses due to thin film intrinsic stress or thermal mismatch.

temp1, temp2: These are the initial and final temperatures for calculating thermal mismatch stresses.
nel: This is the number of nodes per triangle to use. Currently only 6 or 7 are allowed. 6 nodes is faster than 7 and usually gives adequate results, so 6 is the default.

material nitride intrin.sig=1.4e10 stress: This calculates the stresses in the substrate and film arising from a nitride layer which has an intrinsic stress of 1.4E10 when deposited uniformly.

The correct boundary conditions for a thermal mismatch problem are hard to set up.