Manufacturing Solutions

Material Variables

Material Variables

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Material Variables

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The variables for the material update parameters are:

E

=

Young’s Modulus

YS

=

Yield Stress of material

K1

=

Strength coefficient (power law equation P-L-equ )

E04

=

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 K1 and E04:

MV-TS

 

MV-YS

 

 

Where:

e        =        2.718

TS        =        tensile strength

YS        =        yield stress

 

Some common unit conversions are listed below:

 

USCU – SI

SI - USCU

Length

1 in = 25.4 mm

1 mm = 0.03937 in.

Force

1 lb = 4.448 N

1 N = 0.2248 lb

Stress

1 Ksi = 6.895 Mpa

1 Mpa = 0.145 Ksi

Mass

1 lbm = 0.4536 kg
1 lb = 0.0005 tons

1 kg = 2.205 lbm
1 ton = 2000 lbs

Gravity

gravity1

gravity2

 

 

See Also:

User's Guide