/MAT/LAW23

Block Format Keyword

/MAT/LAW23 - Elastic Plastic with Damage Material

Description

This law models an isotropic elastic plastic material and combines Johnson-Cook material model with a generalized damage model. The law is applicable only for solid elements.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/MAT/LAW23/mat_ID/unit_ID or /MAT/PLAS_DAMA/mat_ID/unit_ID
mat_title

E
a		b		n
c				ICC
		Et

Field	Contents	SI Unit Example
mat_ID	Material identifier (Integer, maximum 10 digits)
unit_ID	Optional unit identifier (Integer, maximum 10 digits)
mat_title	Material title (Character, maximum 100 characters)
	Initial density (Real)
E	Young’s modulus (Real)
	Poisson’s ratio (Real)
a	Plasticity yield stress - should be strictly positive. (Real)
b	Plasticity hardening parameter (Real)
n	Plasticity hardening exponent (Comment 3) (Real)
	Failure plastic strain Default = 1030 (Real)
	Plasticity maximum stress Default = 1030 (Real)
c	Strain rate coefficient Default = 0.00 (Real) = 0: no strain rate effect
	Reference strain rate If , no strain rate effect (Real)
ICC	Strain rate computation flag (Comment 5) (Integer) = 0: default set to 1 = 1: strain rate effect on = 2: no strain rate effect on
	Damage model starts at Default = 0.15 (Real)
Et	Softening damage slope () Default = 0.00 (Real)

#RADIOSS STARTER

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/UNIT/1

unit for mat

g mm ms

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#- 2. MATERIALS:

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/MAT/LAW23/1/1

Aluminum

# RHO_I

.0027

# E NU

70000 .3

# a b n EPS_max SIGMA_max0

100 0 1 .2 100

# c EPS_0 ICC

0 0 0

# EPS_dam E_t

.1 -2000

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#ENDDATA

/END

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

1.	The damage law is applied to the stress tensor and damage occurs in tension, compression and shear.

2.	The input is the same as material law /MAT/DAMA (LAW22).

3.	The plasticity hardening exponent n must be less than one.

4.	When reaches , in one integration point, then the solid element is deleted.

5.	ICC is a flag of the strain rate effect on material maximum stress .

mat_law27

/MAT/LAW23 (PLAS_DAMA)

/MAT/LAW23 (PLAS_DAMA)

/MAT/LAW23 (PLAS_DAMA)

Format

See Also: