Material Variables

The variables for the material update parameters are:

E	=	Young’s Modulus
YS	=	Yield Stress of material
	=	Strength coefficient (power law equation )
	=	Pre-strain coefficient
n	=	Strain-hardening exponent (measures stretch ability/work hardening of material)
r	=	Plastic strain ratio (measures deep draw ability of material)

Note: Material units must be consistent for all parameters.

The following equations are commonly used to calculate and :

Where:

e = 2.718

TS = tensile strength

YS = yield stress

Some common unit conversions are listed below: