Failure Models

Failure Model Description

Failure Model Keyword	Type	Application	Description
CHANG	Chang-Chang model	Composite	Failure criteria for composites
CONNECT	Failure	Connection spot weld	Normal and Tangential failure model
EMC	Extended Mohr Coulomb failure model	Metal	Failure dependent on effective plastic strain
ENERGY	Energy isotrop	Metal, plastic	Specific energy
FLD	Forming limit diagram	Metal Forming	Fld
HASHIN	Composite model	Composite	Hashin model
JOHNSON	Ductile failure model	Ductile metal	Johnson-Cook
LAD_DAMA	Composite delamination	Composite	Ladeveze delamination model
NXT	NXT failure criteria	Metal Forming	Similar to FLD, but based on stresses
PUCK	Composite model	Composite	Puck model
SNCONNECT	Failure	Connection, spot weld	Failure criteria for plastic strain
SPALLING	Ductile + Spalling	Ductile metal	Spalling + Johnson-Cook
TAB1	Strain failure model	Ductile metal	based on damage accumulation using user-defined functions
TBUTCHER	Tuler-Butcher model	Ductile metal	Failure due to fatigue
TENSSTRAIN	Traction	Metal, plastic	Strain failure
USERi	User failure model
WIERZBICKI	Ductile material	Ductile metal	Bao-Xue-Wierzbicki model
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
CHANG
CONNECT		√
EMC	√	√	√	√	√	√	√
ENERGY	√	√	√	√	√	√	√
FLD
HASHIN	√	√	√	√	√	√	√
JOHNSON	√	√	√	√	√	√	√
LAD_DAMA	√	√	√	√	√	√	√
NXT
PUCK	√	√	√	√	√	√	√
SNCONNECT		√
SPALLING	√	√	√	√	√	√	√
TAB1	√	√	√	√	√	√	√
TBUTCHER	√	√	√	√	√	√	√
TENSSTRAIN	√	√	√	√	√	√	√
WIERZBICKI	√	√	√	√	√	√	√
WILKINS	√	√	√	√	√	√	√

√: yes

blank: no

Element Compatibility - Part 2

Failure Model	SHELL	TRUSS	BEAM
CHANG	√
CONNECT
EMC
ENERGY	√
FLD	√
HASHIN	√
JOHNSON	√
LAD_DAMA	√
NXT	√
PUCK	√
SNCONNECT
SPALLING
TAB1	√
TBUTCHER	√
TENSSTRAIN	√
WIERZBICKI	√
WILKINS	√

√: yes

blank: no

Law Compatibility with Failure Model

No.	Law
0	VOID	√													√
1	ELAST	√		√		√‡									√
2	PLAS_JOHNS	√	√	√	√	√‡		√					√	√	√	√		√
2	PLAS_ZERIL	√	√	√		√‡		√					√	√	√	√		√
3	HYDPLA			√		√‡		√					√	√	√	√		√
4	HYD_JCOOK			√		√‡		√					√	√	√	√		√
5	JWL
6	HYDRO			√		√‡									√
10	DPRAG1			√		√‡									√
12	3D_COMP			√		√‡	√		√			√
14	COMPSO			√		√‡	√		√			√			√
15	CHANG	√													√		√
16	GRAY
19	FABRI	√													√
21	DPRAG			√		√‡									√
22	DAMA	√		√		√‡		√					√	√	√	√		√
23	PLAS_DAMA			√		√‡		√					√	√	√	√		√
24	CONC			√		√‡									√
25	COMPSH	√					√		√**			√			√		√
27	PLAS_BRIT	√						√					√	√	√	√		√
28	HONEYCOMB			√		√								√	√
29	USER1	√*		√		√									√
30	USER2	√*		√		√									√
31	USER3	√*		√		√									√
32	HILL	√	√					√					√	√	√	√		√
33	FOAM_PLAS			√		√									√
34	BOLTZMAN			√		√									√
35	FOAM_VISC	√		√		√									√
36	PLAS_TAB	√	√	√	√	√		√					√	√	√	√		√
38	VISC_TAB			√		√									√
40	KELVINMAX			√		√									√
41	LEE-TARVER			√		√
42	OGDEN			√		√									√
43	HILL_TAB	√	√	√		√		√					√	√	√	√		√
44	COWPER	√		√		√		√					√	√	√	√		√
48	ZHAO	√		√		√		√					√	√	√	√		√
49	STEINB			√		√‡		√					√	√	√	√		√
50	VISC_HONEY			√		√									√
52	GURSON	√		√		√									√
53	TSAI_TAB			√		√									√
54	PREDIT
57	BARLAT3			√		√
58	FABR_A			√		√									√
59	CONNECT									√	√
60	PLAS_T3	√		√	√	√		√					√	√	√	√		√
62	VISC_HYP			√		√									√
63	HANSEL	√		√		√		√					√	√	√	√		√
64	UGINE_ALZ	√		√		√		√					√	√	√	√		√
65	ELASTOMER	√		√		√		√					√	√	√	√		√
66	LAW66	√		√		√		√					√	√	√	√		√
68	COSSER			√		√
69	LAW69			√		√									√
70	FOAM_TAB			√		√							√		√
72	HILL_MMC	√		√		√	√	√					√	√	√	√		√
73	LAW73	√	√	√		√		√					√		√	√		√
74	LAW74	√		√		√		√					√		√	√		√
75	POROUS
76	SAMP	√		√		√		√					√	√	√	√		√
77	LAW77			√		√							√		√
78	LAW78	√	√	√	√	√	√	√					√	√	√	√	√	√
79	JOHN_HOLM	√		√		√		√					√	√	√	√		√
80	LAW80	√		√		√	√	√					√	√	√	√		√
81	LAW81
82	LAW82			√		√									√
83	LAW83										√
84	LAW84				√
87	LAW87
92	LAW92			√		√									√

√: yes

blank: no

* : for shells only

** : for solid only

‡ : flag Istrain (defined in property card) must be activated

Comments

1.	Failure models are not available with global integration (N=0 in /PROP/SHELL) for shells.

2.	Keyword USER1, USER2 and USER3 refer to User’s Failure Models for shell and brick elements.

3.	Up to 6 failure models can be applied to a single material, each failure model representing a failure mode.

4.	Failure models can be used for SPH simulation for all materials compatible with SPH formulation.

5.	Four failure models (FLD, JOHNSON, TAB1, and TBUTCHER) are compatible with X-FEM provided property TYPE1 (SHELL), TYPE11 (SH_SANDW), or TYPE51 is used.

6.	/FAIL/TAB1 and /PROP/TYPE51 cannot be used with XFEM yet.