DMGEVO

Bulk Data Entry Defines the damage evolution.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DMGEVO DMGEVOID TYPE SHAPE            
  MMXFM ALPHA W1 W2 W3        

Example (Damage based on energy with power law mixing)

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DMGEVO 24 COHENRG EXP            
  1 1.2 2.0 5.0 5.0        

Example (Damage based on energy with B-K form mixing)

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DMGEVO 57 COHENRG LIN            
  2 1.5 24.0 50.0          

Example (Damage based on energy no mode mixing)

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DMGEVO 57 COHENRG LIN            
      20.0            

Example (Damage based on opening)

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
DMGEVO 1 COHDISP EXP            
    2.0 20.0            

Definitions

Field Contents SI Unit Example
DMGEVOID Damage evolution identification number.

No default (Integer > 0)

  
TYPE Damage evolution type.
COHDISP
Damage index evaluated by displacement.
COHENRG
Damage index evaluated by energy dissipated.

No default

 
SHAPE Profile shape of the traction-opening curve in the descending part.
LIN (Default)
Linear shape.
EXP
Exponential shape.
  
MMXFM Mode mixed form (only for TYPE = COHENRG).
Blank (Default)
Modes are not mixed.
1
Power law form.
2
Benzeggah-Kenane form.
  
ALPHA When TYPE = COHDISP with SHAPE = EXP, it is the exponent for the traction-separation curve.

When TYPE = COHENRG with MMXFM = 1, it is the exponent for the mixing formula.

When TYPE = COHENRG with MMXFM = 2, it is the mixing coefficient.

No default (Real > 0)

  
W1. W2, W3 Material curve parameters.
When TYPE=COHDISP, only W1 is required.
W1
The separation evaluated from damage initiation to failure.
W2 and W3
Must be blank.
When TYPE=COHENRG, the parameters are the energies that can be dissipated in pure normal and pure shear separation.
W1
Energy dissipated in Mode I.
W2
Energy dissipated in Mode II.
W3
Energy dissipated in Mode III.
When TYPE=COHENRG with MMXFM= Blank.
W1
Energy dissipated.
W2 and W3
Must be blank.

No default (Real > 0)

 [ m ] for TYPE=COHDISP

[ N m ] or [ J m 2 ] for TYPE=COHENRG

Comments

  1. The material identification number should be unique for all MAT1, MAT2, MAT3, MAT8, MAT9, MGASK, MCOHE, MCOHED, DMGINI, and DMGEVO entries.
  2. For additional information, refer to Cohesive Zone Modeling in the User Guide.