/MAT/LAW0 (VOID)

Block Format Keyword

/MAT/LAW0 - Void Material

Description

This material can be used to define elements to act as a void, or an empty space.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/MAT/LAW0/mat_ID/unit_ID or /MAT/VOID/mat_ID/unit_ID
mat_title

Optional

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
		E

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)

#RADIOSS STARTER

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

/BEGIN

LAW00_void steel

130 0

Mg mm s

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

#- 2. MATERIALS:

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

/MAT/VOID/1

Void

# RHO E NU

7.85E-9 210000 0.3

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

#ENDDATA

/END

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

1.	Only law, mat_ID, and mat_title are used (refer to the keyword /MAT).

2.	This additional data allows defining contact interfaces with void material and property: all kinds of input for interfaces will then be available (Igap =1, Stfac as a stiffness factor).

3.	Contact stiffness will be correctly calculated only when E, and t (thickness in property) are given.

4.	When density of the void material is requested, the mass of the material is accounted in kinetic energy calculation.