# MCOHED

Bulk Data Entry Defines the material properties for damage-based cohesive material models.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MCOHED MID KI KII KIII SFC VED   MXDMG
DMGINIID DMGEVOID

## Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MCOHED 2 9000. 3000. 3000. -1.0 1.0e-3   0.99
20 23

## Definitions

Field Contents SI Unit Example
MID Material identification number.

No default (Integer > 0)

KX, KY, KZ Elasticity modulus corresponding to Mode I, II and III deformation, when the card is used in cohesive elements.

Penalty stiffness corresponding to Mode I, II and III deformation, when the card is used in cohesive contacts. 2

No default (Real)

$\frac{\text{N}}{{\text{m}}^{2}}$ for cohesive elements

$\frac{\text{N}}{{\text{m}}^{3}}$ for cohesive contacts

SFC Stiffening factor in compression.
Positive value (Real > 0.0)
Directly prescribed stiffness
Negative value (Real < 0.0)
Defines a stiffness scaling factor. The stiffness scaling factor is equal to |Real< 0.0|. The scaling is applied to the initial stiffness in separation condition.
SOFT
Takes the maximum diagonal value in the global stiffness of the numerical model multiplied by 1.0E2 as the compression stiffness.
HARD
Takes the maximum diagonal value in the global stiffness of the numerical model multiplied by 1.0E6 as the compression stiffness.
AUTO
Takes the maximum diagonal value in the global stiffness of the numerical model multiplied by 1.0E4 as the compression stiffness.

Default = 1.0

VED Factor for viscous energy dissipation. 3

Default = 0.0 (Real > 0.0)

MXDMG Maximum damage index, above which the cohesive element is excluded from analysis.

Default = 1.0 (Real ≥ 0.0)

DMGINIID Damage initiation card ID.

No default (Integer > 0)

DMGEVOID Damage evolution card ID.

No default (Integer > 0)