Failures
Failures describe material failure criteria to be coupled to material models.
In PAM-CRASH 2G, Damage and Failure parameters of Modular material MMAT are defined through the Failure entity.
In Radioss, Failure models are defined with the keywords /FAIL.
Failure entities have a display state, on or off, which controls the display of these entities in the graphics area. To hide or show a Failure entity, the “Hide Attached” option in the Model Browser configure window, must be activated. The display state of a Failure entity can be controlled using the icon next to the entity in the Model Browser.
Failure entities also have an active and export state. The active state of a Failure entity controls its display state and its listing in the Model Browser along with its views. If a Failure entity is active, then its display state is available to be turned on or off and it is listed in the Model Browser along with its views. If a Failure entity is inactive, then its display state is turned off permanently and it is not listed in the Model Browser or any of its views.
The export state of a Failure entity controls whether or not this entity is exported when the custom export option is used. The all export option is not affected by the export state. The active and export states of Failure entities can be controlled using the Entity State Browser.
PAM-CRASH Cards
| Card | Solver Description | Application | Notes |
|---|---|---|---|
| MMAT / FAILURE GLOBAL_BEHAVIOR |
Global Damage and Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE DUCTILE_CURVES |
Ductile Damage by Curves Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE DUCTILE_LOOKU |
Ductile Damage by Look-Up Tables Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE SHEAR_CURVES |
Shear Damage by Curves Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE SHEAR_LOOKU |
Shear Damage by Look-Up Tables Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE JOHNSON_COOK |
Johnson-Cook Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE XUE_WIERZBICKI |
Xue-Wierzbicki Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE MODIFIED_MOHR_COULOMB |
Modified Mohr-Coulomb Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE ANISOTROPIC_FRACTURE |
Anisotropic Fracture Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE FORMING_LIMIT_DIAGRAM |
Forming Limit Diagram Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE MUSCHENBORN_SONNE |
Müschenborn-Sonne Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE ENHANCED_HILL_STOREN_RICE |
Enhanced Hill-Stören-Rice Failure Parameters Definition | Damage and Failure Parameters | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE GENERALIZED_NECKING |
Generalized Necking Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE PLASTIC_STRAIN_SOFTENING |
Plastic Strain Softening Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE HILL_STOREN_RICE |
Hill-Stören-Rice Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE MODIFIED_HILL_STOREN_RICE |
Modified Hill-Stören-Rice Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE RELATIVE_THICKNESS |
Relative Thickness Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE MAXIMUM_STRAINING |
Maximum Straining Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE PLASTIC_STRAIN_DAMAGE |
Plastic Strain Damage Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE EXTENDED_COCKCROFT_LATHAM |
Extended Cockcroft-Latham Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
| MMAT / FAILURE TABLE_DRIVEN_LOOKUP |
Data-Driven Look-Up Table Failure Parameters Definition | Elastic-plastic materials | Damage and Failure Parameters defined in a FAILURE - END_FAILURE cards block of MMAT / |
Radioss Cards
| Card | Solver Description | Application | Notes |
|---|---|---|---|
| /FAIL/BIQUAD | Strain failure model | Ductile metal | Direct input on effective plastic strain to failure |
| /FAIL/CHANG | Chang-Chang model | Composite | Failure criteria for composites |
| /FAIL/CONNECT | Failure | Connection spot weld | Normal and Tangential failure model |
| /FAIL/EMC | Extended Mohr Coulomb failure model | Metal | Failure dependent on effective plastic strain |
| /FAIL/ENERGY | Energy isotrop | Metal, plastic | Specific energy |
| /FAIL/FABRIC | Anisotropic strain failure | Fibers of fabric material | Fabric material laws MAT58 and MAT98 |
| /FAIL/FLD | Forming limit diagram | Metal Forming | Fld |
| /FAIL/HASHIN | Composite model | Composite | Hashin model |
| /FAIL/HC-DSSE | Strain-based failure model | Shells with linear damage accumulation | Hosford-Coulomb with Domain of Shell-to-Solid Equivalence |
| /FAIL/JOHNSON | Ductile failure model | Ductile metal | Johnson-Cook |
| /FAIL/LAD_DAMA | Composite delamination | Composite | Ladeveze delamination model |
| /FAIL/NXT | NT failure model | Metal Forming | Similar to FLD, but based on stresses |
| /FAIL/ORTHSTRAIN | Orthotropic strain failure model | Solid and Shell elements | Size effects and strain rate effects |
| /FAIL/PUCK | Composite model | Composite | Puck model |
| /FAIL/SNCONNECT | Failure | Connection, spot weld | Failure criteria for plastic strain |
| /FAIL/SPALLING | Ductile + Spalling | Ductile metal | Spalling + Johnson-Cook |
| /FAIL/TAB1 | Strain failure model | Ductile metal | Based on damage accumulation using user-defined functions |
| /FAIL/TBUTCHER | Tuler-Butcher model | Ductile metal | Failure due to fatigue |
| /FAIL/TENSSTRAIN | Traction | Metal, plastic | Strain failure |
| /FAIL/USERi | User failure model | n/a | n/a |
| /FAIL/WIERZBICKI | Ductile material | Ductile metal | Bao-Xue-Wierzbicki model |
| /FAIL/WILKINS | Ductile failure model | Ductile metal | Wilkins model |
| /FAIL/XFEM | XFEM (Extended Finite Element Method |