/MAT/LAW0 (VOID)

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

Format

(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)
ρ E υ        

Definition

Field Contents SI Unit Example
mat_ID Material identifier

(Integer, maximum 10 digits)

 
unit_ID Unit Identifier

(Integer, maximum 10 digits)

 
mat_title Material title

(Character, maximum 100 characters)

 
ρ Initial density

(Real)

[ kg m 3 ]
E Young's modulus

(Real)

[ Pa ]
υ Poisson's ratio

(Real)

 

Example (Steel)

#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/1
unit for mat
                  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/1/1
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----|

Comments

  1. Only law, mat_ID, and mat_title are used (refer to the keyword Materials).
  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, υ and t (thickness in property) are given.
  4. When density of the void material is defined, the mass of the material is accounted in kinetic energy calculation.