2023

2023

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

Example (Ductile damage based on displacement)

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DMGEVO	1	DISP	EXP
		2.0	0.5

Example (Ductile damage based on energy)

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
DMGEVO	1	ENERGY	LIN
			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 for cohesive elements. COHENRG Damage index evaluated by energy dissipated for cohesive elements. DISP Damage index evaluated by displacement for solid and shell elements (ductile damage). ENERGY Damage index evaluated by energy for solid and shell elements (ductile damage). 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. When `TYPE` = DISP or ENERGY with `SHAPE` = EXP, it is the exponent for the stress degrading curve. No default (Real > 0)
`W1`. `W2`, `W3`	Material curve parameters. When `TYPE`=COHDISP/DISP, 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. When `TYPE`=DISP `W1` Equivalent plastic displacement from damage initiation to failure. `W2` and `W3` Must be blank. When `TYPE`=ENERGY `W1` Energy dissipated from damage initiation to failure. `W2` and `W3` Must be blank. No default (Real > 0)	$[m]$ for `TYPE`=COHDISP/DISP $[\frac{N}{m}]$ or $[\frac{J}{m^{2}}]$ for `TYPE`=COHENRG/ENERGY

Comments

The material identification number should be unique for all MAT1, MAT2, MAT3, MAT8, MAT9, MGASK, MCOHE, MCOHED, DMGINI, and DMGEVO entries.

The support information for Damage evolution is as follows:

Analysis Types	Criterion
Nonlinear Static Analysis, Nonlinear Transient Analysis	DISP, ENERGY, COHDISP, COHENRG
Explicit Dynamic Analysis	DISP, ENERGY

Element Types	Criterion
Regular Shell and Solid Elements	DISP, ENERGY
Cohesive Elements	COHDISP, COHENRG

For additional information about cohesive elements, refer to Cohesive Zone Modeling in the User Guide.