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ブラウザ 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ブラウザ.

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ブラウザ 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ブラウザ 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ブラウザ 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 エンティティ状態ブラウザ.

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