/FAIL/XFEM_FLD (Obsolete)

Block Format Keyword Describes a XFEM (eXtended Finite Element Method) failure model.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
fct_ID Ifail_sh                

Optional Line

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)


Field Contents SI Unit Example
mat_ID Material identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

fct_ID Function identifier


Ifail_sh Shell failure flag
= 1
Shell is cracked (not deleted), if there is one layer in failure zone.
= 2
The layer tensor stress is set to zero if this layer is in the failure zone, and shell is cracked (not deleted), if all layers are in the failure zone.


fail_ID (Optional) Failure criteria identifier 2

(Integer, maximum 10 digits)



  1. This failure model is available for Shell only.

    Figure 1.
  2. The fail_ID is used with /STATE/BRICK/FAIL and /INIBRI/FAIL. There is no default value. If the line is blank, no value will be output for failure model variables in the /INIBRI/FAIL (written in .sta file with /STATE/BRICK/FAIL option).