Damage Ply Material definition dialog box (Simcenter Samcef)

In the Orthotropic material dialog box, select the Damage page to define the Samcef damage ply material parameters.

If you select UD Ply Damage (General orthotropic Ply), you can enter the materials parameters related to the Samcef Damage Ply material.

For more information, see the Samcef material page.

Damage (basic)

Maximum Damage Value (dmax)	Lets you specify the fibers maximum damage value.For more information, see the DDEN parameter of the Samcef Damage Ply material.
3D Effect parameter (PE)	Lets you specify the out-of-plane characteristic of the damage. If you choose Plane Stress Effect, the damage is not linked to the out-of-plane stresses. If you choose 3D Effect, the damage takes the out-of-plane stresses into account.For more information, see the PE parameter of the Samcef Damage Ply material.
Energy Threshold of Fiber Direction 1 (Y11lim+) Energy Threshold of Fiber Direction 1 (Y11lim-)	Lets you specify the breaking thresholds in traction (+) and compression (-) respectively.For more information, see the YS11 parameter of the Samcef Damage Ply material.
Limit Energy in the Transverse Direction (YS22)	Lets you specify the transverse fissurization threshold.For more information, see the YS22 parameter of the Samcef Damage Ply material.
Transition Thickness (HBAR)	Lets you specify the transition thickness.For more information, see the HBAR parameter of the Samcef Damage Ply material.

Damage law for shear

Limit Value of Energy in Shear (YS12)	Lets you specify the in-plane fissurization threshold.For more information, see the YS12 parameter of the Samcef Damage Ply material.
Linear Damage Law for Shear****Non-linear Damage Law for Shear	Lets you specify the linear or nonlinear characteristic of the damage law for shear.

This option is available when you select the Linear Damage Law for Shear.
Energy Threshold in Shear (Y012)	Lets you specify the fiber vs. matrix debonding threshold.For more information, see the Y012 parameter of the Samcef Damage Ply material.
Critical Value of Energy in Shear (YC12)	Lets you specify the critical thermodynamic force.For more information, see the YC12 parameter of the Samcef Damage Ply material.

This option is available when you select the Non-linear Damage Law for Shear.
Non-linear Function for Damage in Shear (Y12G)	Lets you specify the nonlinear law (unitless vs. stress) for the damage behavior in shear.For more information, see the Y12G parameter of the Samcef Damage Ply material.

Damage variables coupling coefficients

The damage variables can be coupled by specific coefficients.

Coupling Coefficient (b2)	Lets you specify the b2 coupling coefficient.
Coupling Coefficient (b3)	Lets you specify the b3 coupling coefficient.
Coupling Coefficient (a)	Lets you specify the coupling coefficient between the damage and the plasticity.

Note:

If you specify a non-zero value for b3, you must specify a value for b2. If you specify a non-zero value for a, both b2, and b3 must be defined.

For more information, see the DCOU parameter of the Samcef Damage Ply material.

Time delay effect law

Time for Delay (TAU) Parameter for Delay (ADEL)	Lets you define the two parameters that drive the time delay effect law. If TAU is zero, there is no time delay effect.For more information, see the TAU and ADEL parameters of the Samcef Damage Ply material.

Nonlinearities in traction and compression.

**Depends on Strain (PLYUNI2)**Depends on Stress (PLYUNI3)	Lets you specify whether the nonlinearity in the fiber direction depends on the strains or on the stresses.
Non-linear Coefficient for Fiber Direction 1 (Ksi+) Non-linear Coefficient for Fiber Direction 1 (Ksi-)	Lets you define the nonlinearity coefficients in traction (+) and compression (-) respectively.For more information, see the YNLE parameter of the Samcef Damage Ply material.

Coupling with plasticity

Initial Plastic Threshold (LITK)	Lets you define the initial plasticity threshold.For more information, see the LITK parameter of the Samcef Damage Ply material.
Parameter of Plastic Law (BIGK)	Lets you define the K experimental parameter of the plasticity law.For more information, see the BIGK parameter of the Samcef Damage Ply material.
Exponent of Plastic Law (EXPN)	Lets you define the γ plasticity law exponent.For more information, see the EXPN parameter of the Samcef Damage Ply material.

Non Local Parameter (advanced)

Non Local Parameter (QYT)	Lets you specify the non-local diffusion radius related to the Non Local Behavior of the Solid Laminate Property. For more information, see the QYT parameter of the Samcef Damage Ply material.

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Damage Ply Material definition dialog box (Simcenter Samcef), Simcenter 3D 2021.1 Series

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