Failure Models

The supported failure models in Radioss.

Failure Model Description

Failure Model Keyword Type Application Description
/FAIL/ALTER Stress-based for glass Glass Stress-based for glass
/FAIL/BIQUAD Strain failure model Ductile metal Direct input for effective plastic strain to failure
/FAIL/CHANG Chang-Chang model Composite Failure criteria for composites
/FAIL/COCKCROFT Ductile failure model Ductile material Cockcroft-Latham failure model
/FAIL/CONNECT Failure Connection, spotweld Normal and tangential failure model
/FAIL/EMC Extended Mohr Coulomb model Metal Failure dependent on effective plastic strain
/FAIL/ENERGY Energy isotrop Metal, plastic Energy density
/FAIL/FABRIC Traction Fabric Strain failure
/FAIL/FLD Forming limit diagram Metal Forming Fld
/FAIL/FRACTAL_DAMAGE Fractal damage initialization Glass Initializing a fractal pattern of pre-damaged elements
/FAIL/GENE1 Failure Multiple failure model with multiple combinations
/FAIL/GURSON Ductile failure model Metal Failure based on void nucleation and growth in metal plasticity
/FAIL/HASHIN Composite model Composite Hashin model
/FAIL/HC_DSSE Extended Mohr Coulomb failure model Metal Strain-based Ductile Failure Model: Hosford-Coulomb with Domain of Shell-to-Solid Equivalence
/FAIL/HOFFMAN Composite model Composite Hoffman failure model
/FAIL/INIEVO Initiation/Evolution failure model Ductile material Two steps initiation + evolution damage criterion coupled with stresses computation
/FAIL/JOHNSON Ductile failure model Ductile metal Johnson-Cook
/FAIL/LAD_DAMA Composite delamination Composite Ladeveze delamination model
/FAIL/MAXSTRAIN Composite model Composite Maximum strain failure model
/FAIL/MULLINS_OR Hyperelastic damage Hyperelastic materials Stress softening Mullins effect of hyperelastic materials
/FAIL/NXT NXT failure model Metal forming Similar to FLD, but based on stresses
/FAIL/ORTHBIQUAD Orthotropic strain failure model Ductile metal Direct input for orthotropic effective plastic strain to failure
/FAIL/ORTHENERG Orthotropic energy based failure Composite Orthotropic energy based failure criterion
/FAIL/ORTHSTRAIN Orthotropic strain failure Composite Orthotropic strain failure criteria with size effects and strain rate effects
/FAIL/PUCK Composite model Composite Puck model
/FAIL/RTCL Ductile failure model Ductile metal RTCL (Rice – Tracey – Cockroft – Latham) failure model
/FAIL/SAHRAEI Battery model Battery cells Orthotropic strain-based failure model to predict failure and shortcut in battery cells
/FAIL/SNCONNECT Failure Connection, spot weld Failure criteria for plastic strain
/FAIL/SPALLING Ductile + Spalling Ductile metal Spalling + Johnson-Cook
/FAIL/SYAZWAN Ductile failure Ductile metal Stress triaxiality-based ductile failure model
/FAIL/TAB1 Strain failure model Ductile metal Based on damage accumulation using user-defined functions
/FAIL/TAB2 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/TSAIHILL Composite model Composite TSAIHILL failure model
/FAIL/TSAIWU Composite model Composite TSAIWU failure model
USER1,USER2, USER3 User failure model
/FAIL/VISUAL Visualization of max value Visualization of the maximum value of every cycle in a simulation
/FAIL/WIERZBICKI Ductile material Ductile metal Bao-Xue-Wierzbicki model
/FAIL/WILKINS Ductile failure model Ductile metal Wilkins model

Element Compatibility - Part 1

Failure Model 2D Quad 8 node Brick 20 node Brick 4 node Tetra 10 node Tetra 8 node Thick Shell 16 node Thick Shell
/FAIL/ALTER
/FAIL/BIQUAD
/FAIL/CHANG
/FAIL/COCKCROFT
/FAIL/CONNECT
/FAIL/EMC
/FAIL/ENERGY
/FAIL/FABRIC
/FAIL/FLD
/FAIL/FRACTAL_DAMAGE
/FAIL/GENE1
/FAIL/GURSON
/FAIL/HASHIN
/FAIL/HC_DSSE
/FAIL/HOFFMAN
/FAIL/JOHNSON
/FAIL/INIEVO
/FAIL/LAD_DAMA
/FAIL/MAXSTRAIN
/FAIL/MULLINS_OR
/FAIL/NXT
/FAIL/ORTHBIQUAD
/FAIL/ORTHENERG
/FAIL/ORTHSTRAIN
/FAIL/PUCK
/FAIL/RTCL
/FAIL/SAHRAEI
/FAIL/SNCONNECT
/FAIL/SPALLING
/FAIL/SYAZWAN
/FAIL/TAB1
/FAIL/TAB2
/FAIL/TBUTCHER
/FAIL/TENSSTRAIN
/FAIL/TSAIHILL
/FAIL/TSAIWU
/FAIL/USERi
/FAIL/VISUAL
/FAIL/WIERZBICKI
/FAIL/WILKINS

✓: yes

blank: no

Element Compatibility - Part 2

✓: yes

blank: no

*: only for /PROP/TYPE18

Law Compatibility with (Metal) Failure Model

Law ALTER BIQUAD COCKCROFT CONNECT ECM ENERGY FLD FRACTAL_DAMAGE GENE1 GURSON HC-DSSE INIEVO JOHNSON NXT RTCL SNCONNECT SPALLING SYAZWAN TAB1 TAB2 TBUTCHER TENSSTRAIN WIERZBICKI WILKINS
/MAT/LAW0 (VOID)
/MAT/PLAS_PREDEF ✓‡
/MAT/LAW1 (ELAST) ✓‡
/MAT/LAW2 (PLAS_JOHNS) ✓‡
/MAT/PLAS_ZERIL ✓‡
/MAT/LAW3 (HYDPLA) ✓‡
/MAT/LAW4 (HYD_JCOOK) ✓‡
/MAT/LAW5 (JWL)
/MAT/LAW6 (HYDRO or HYD_VISC) ✓‡
/MAT/LAW10 (DPRAG1) ✓‡
/MAT/LAW12 (3D_COMP) ✓‡
/MAT/LAW14 (COMPSO) ✓‡
/MAT/LAW15 (CHANG)
/MAT/LAW16 (GRAY)
/MAT/LAW19 (FABRI)
/MAT/LAW21 (DPRAG) ✓‡
/MAT/LAW22 (DAMA) ✓‡
/MAT/LAW23 (PLAS_DAMA) ✓‡
/MAT/LAW24 (CONC) ✓‡
/MAT/LAW25 (COMPSH)
/MAT/LAW27 (PLAS_BRIT)
/MAT/LAW28 (HONEYCOMB)
USER1 ✓*
USER2 ✓*
USER3 ✓*
/MAT/LAW32 (HILL)
/MAT/LAW33 (FOAM_PLAS)
/MAT/LAW34 (BOLTZMAN)
/MAT/LAW35 (FOAM_VISC)
/MAT/LAW36 (PLAS_TAB)
/MAT/LAW38 (VISC_TAB)
/MAT/LAW40 (KELVINMAX)
/MAT/LAW41 (LEE_TARVER)
/MAT/LAW42 (OGDEN)
/MAT/LAW43 (HILL_TAB)
/MAT/LAW44 (COWPER)
/MAT/LAW48 (ZHAO)
/MAT/LAW49 (STEINB) ✓‡
/MAT/LAW50 (VISC_HONEY)
/MAT/LAW52 (GURSON)
/MAT/LAW53 (TSAI_TAB)
/MAT/LAW54 (PREDIT)
/MAT/LAW57 (BARLAT3)
/MAT/LAW58 (FABR_A)
/MAT/LAW59 (CONNECT)
/MAT/LAW60 (PLAS_T3)
/MAT/LAW62 (VISC_HYP)
/MAT/LAW63 (HANSEL)
/MAT/LAW64 (UGINE_ALZ)
/MAT/LAW65 (ELASTOMER)
/MAT/LAW66
/MAT/LAW68 (COSSER)
/MAT/LAW69
/MAT/LAW70 (FOAM_TAB)
/MAT/LAW72 (HILL_MMC)
/MAT/LAW73
/MAT/LAW74
/MAT/LAW75 (POROUS)
/MAT/LAW76 (SAMP)
/MAT/LAW77
/MAT/LAW78
/MAT/LAW79 (JOHN_HOLM)
/MAT/LAW80
/MAT/LAW81
/MAT/LAW82
/MAT/LAW83
/MAT/LAW84
/MAT/LAW87 (BARLAT2000)
/MAT/LAW88
/MAT/LAW90
/MAT/LAW92
/MAT/LAW93 (ORTH_HILL) or (CONVERSE)
/MAT/LAW94 (YEOH)
/MAT/LAW95 (BERGSTROM_BOYCE)
/MAT/LAW97 (JWLB)
/MAT/LAW100 (MNF)
/MAT/LAW101
/MAT/LAW102 (DPRAG2) ✓‡
/MAT/LAW103 (HENSEL-SPITTEL)
/MAT/LAW104 (JOHNS_VOCE_DRUCKER)
/MAT/LAW106 (JCOOK_ALM)
/MAT/LAW108 (SPR_GENE)
/MAT/LAW109
/MAT/LAW110 (VEGTER)
/MAT/LAW111
/MAT/LAW112 (PAPER or XIA)
/MAT/LAW113 (SPR_BEAM)
/MAT/LAW114 (SPR_SEATBELT)
/MAT/LAW115 (DESHFLECK)
/MAT/LAW116
/MAT/LAW117
/MAT/LAW119 (SH_SEATBELT)
/MAT/LAW120 (TAPO)
/MAT/LAW121 (PLAS_RATE)
/MAT/LAW122 (MODIFIED_LADEVEZE)
/MAT/LAW124 (CDPM2)
/MAT/LAW126 (JOHNSON_HOLMQUIST_CONCRETE)
/MAT/LAW200 (MDS)

Law Compatibility for Composite and Other Failure Models

Law CHANG FABRIC HASHIN HOFFMAN INIEVO LAD_DAMA MAXSTRAIN MULLINS_OR ORTHOBIQUAD ORTHENERG ORTHSTRAIN PUCK SAHRAEI SYAZWAN TSAIHILL TSAIWU USERi VISUAL
/MAT/LAW0 (VOID)
/MAT/PLAS_PREDEF
/MAT/LAW1 (ELAST) ✓***
/MAT/LAW2 (PLAS_JOHNS)
/MAT/PLAS_ZERIL
/MAT/LAW3 (HYDPLA)
/MAT/LAW4 (HYD_JCOOK)
/MAT/LAW5 (JWL)
/MAT/LAW6 (HYDRO or HYD_VISC)
/MAT/LAW10 (DPRAG1)
/MAT/LAW12 (3D_COMP)
/MAT/LAW14 (COMPSO)
/MAT/LAW15 (CHANG)
/MAT/LAW16 (GRAY)
/MAT/LAW18 (THERM)
/MAT/LAW19 (FABRI)
/MAT/LAW21 (DPRAG)
/MAT/LAW22 (DAMA)
/MAT/LAW23 (PLAS_DAMA)
/MAT/LAW24 (CONC)
/MAT/LAW25 (COMPSH) ✓**
/MAT/LAW27 (PLAS_BRIT)
/MAT/LAW28 (HONEYCOMB)
USER1
USER2
USER3
/MAT/LAW32 (HILL)
/MAT/LAW33 (FOAM_PLAS)
/MAT/LAW34 (BOLTZMAN)
/MAT/LAW35 (FOAM_VISC)
/MAT/LAW36 (PLAS_TAB)
/MAT/LAW38 (VISC_TAB)
/MAT/LAW40 (KELVINMAX)
/MAT/LAW41 (LEE_TARVER)
/MAT/LAW42 (OGDEN)
/MAT/LAW43 (HILL_TAB)
/MAT/LAW44 (COWPER)
/MAT/LAW48 (ZHAO)
/MAT/LAW49 (STEINB)
/MAT/LAW50 (VISC_HONEY)
/MAT/LAW52 (GURSON)
/MAT/LAW53 (TSAI_TAB)
/MAT/LAW54 (PREDIT)
/MAT/LAW57 (BARLAT3)
/MAT/LAW58 (FABR_A)
/MAT/LAW59 (CONNECT)
/MAT/LAW60 (PLAS_T3)
/MAT/LAW62 (VISC_HYP)
/MAT/LAW63 (HANSEL)
/MAT/LAW64 (UGINE_ALZ)
/MAT/LAW65 (ELASTOMER)
/MAT/LAW66
/MAT/LAW68 (COSSER)
/MAT/LAW69
/MAT/LAW70 (FOAM_TAB)
/MAT/LAW71
/MAT/LAW72 (HILL_MMC)
/MAT/LAW73
/MAT/LAW74
/MAT/LAW75 (POROUS)
/MAT/LAW76 (SAMP)
/MAT/LAW77
/MAT/LAW78
/MAT/LAW79 (JOHN_HOLM)
/MAT/LAW80