FATDEF

Bulk Data Entry Defines elements or grids, and associated fatigue properties, for consideration in a fatigue analysis.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
FATDEF ID TOPSTR
Optional continuation lines for selecting elements, or corresponding grids, and associated fatigue properties, using element sets (ELSET)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
ELSET ELSID1 PFATID1/

PFATSPWID1

 ELSID2 PFATID2/

PFATSPWID2

 ELSID3 PFATID3/

PFATSPWID3
ELSID4 PFATID4/

PFATSPWID4

 etc etc etc etc
etc etc
Optional continuation lines for selecting elements and associated fatigue properties through referenced properties (PTYPE)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
PTYPE PID1 PFATID1/

PFATSPWID1

 PID2 PFATID2/

PFATSPWID2

 PID3 PFATID3/

PFATSPWID3
PID4 PFATID4/

PFATSPWID4

 etc etc etc etc
etc etc
Optional continuation lines for seam weld fatigue analysis
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
FATSEAM FATSEAM ID1 PFATSMW ID1 FATSEAM ID2 PFATSMW ID2 PFATSMW ID3
FATSEAM ID4 PFATSMW ID4 etc etc etc etc
etc etc FATSEAM ID3
Optional continuation lines for excluding elements using element sets (ELSET)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
XELSET XELSID1 XELSID2 XELSID3 XELSID4 XELSID5 XELSID6 XELSID7
XELSID8 etc etc etc etc etc etc
etc etc
Optional continuation lines for excluding individual elements
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
XELEM XEID1 XEID2 XEID3 XEID4 XEID5 XEID6 XEID7
XEID8 etc etc etc etc etc etc
etc etc
Optional continuation lines for excluding grids using grid sets (GSET)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
XGSET XGSID1 XGSID2 XGSID3 XGSID4 XGSID5 XGSID6 XGSID7
XGSID8 etc etc etc etc etc etc
etc etc
Optional continuation lines for excluding individual grids
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
XGRID XGID1 XGID2 XGID3 XGID4 XGID5 XGID6 XGID7
XGID8 etc etc etc etc etc etc
etc etc
Optional continuation lines for solder fatigue analysis
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
FATSDR FATSDR ID PFATSDR ID

Definitions

Field Contents SI Unit Example
ID Each FATDEF card must have a unique ID. FATDEF Subcase Information Entry may reference this ID.

No default (Integer > 0)
TOPSTR Top stress fraction. Elements with combined stress not in this top fraction of each MATFAT group will be screened out and have no results. This field is ignored in fatigue analysis on a transient subcase.

Default = blank (100% will be used internally), (0.0 < Real ≤ 1.0)
ELSET Indicates that a list of pairs of ELSET and PFAT/PFATSPW IDs will follow, defining elements, and their associated fatigue properties, for consideration in fatigue analyses where this FATDEF is selected.
ELSID# Element set ID. Elements in this set will be considered in fatigue analyses where this FATDEF is selected.

No default (Integer > 0)
PFATID# Fatigue property ID. This is the identification number of a PFAT entry, which indicates the fatigue property used by the preceding elements defined by ELSID# or PID#.
PFATSPWID# Fatigue property ID for spot weld fatigue analysis. This is the identification number of a PFATSPW entry, which indicates the fatigue property used by the preceding elements defined by ELSID# or PID#.
PTYPE Indicates that a list of pairs of property IDs of type PTYPE and PFAT/PFATSPW IDs will follow; defining elements and their associated fatigue properties for consideration in fatigue analyses where this FATDEF is selected. 2
PID# Property ID. This is the identification number of a property entry corresponding to the specified PTYPE field. Elements referencing any property with this ID will be considered in fatigue analyses where this FATDEF is selected. 3

No default (Integer > 0)
FATSEAM Indicates that the list of pairs of FATSEAM ID's and PFATSMW ID's are to follow and these will be used for seam weld fatigue analysis.
FATSEAM ID# References a FATSEAM Bulk Data Entry that contains parameters and property identification information for seam weld fatigue analysis.
PFATSMW ID# Fatigue property ID for seam weld fatigue analysis. This is the identification number of a PFATSMW entry, which indicates the fatigue property used by the preceding elements defined by ELSID# or PID#.
XELSET Indicates that IDs of elements sets excluded from fatigue analysis follow.
XELSID# Element set ID. Elements in these sets will be excluded from fatigue analyses where this FATDEF is selected.

No default (Integer > 0)
XELEM Indicates that IDs of elements excluded from fatigue analysis follow.
XEID# Element ID. These elements will be excluded from fatigue analyses where this FATDEF is selected.

No default (Integer > 0)
XGSET Indicates that IDs of grid sets excluded from fatigue analysis follow.
XGSID# Grid set ID. Grids in these sets will be excluded from fatigue analyses where this FATDEF is selected.

No default (Integer > 0)
XGRID Indicates that IDs of Grids excluded from fatigue analysis follow.
XGID# Grid ID. These Grids will be excluded from fatigue analyses where this FATDEF is selected.

No default (Integer > 0)
FATSDR Optional continuation line for solder fatigue analysis.
FATSDR ID Identification number of a FATSDR Bulk Data Entry that defines a solder joint.

No default (Integer > 0)
PFATSDR ID Identification number of a PFATSDR Bulk Data Entry that defines fatigue properties for solder fatigue analysis.

No default (Integer > 0)

Comments

  1. At least one of the optional continuation lines ELSET or PROP must be present.
  2. PTYPE can be set as one of PSHELL, PSOLID, PWELD, PBAR, PBARL, PBEAM, or PBEAML to represent that the corresponding property ID's (PID# fields) are to follow.
    Note: That PWELD, PBAR, PBARL, PBEAM, or PBEAML references for PTYPE field are supported only for spot weld fatigue analysis. Additionally, for spot weld fatigue analysis, PFATSPWID# fields should reference corresponding PFATSPW entries.
  3. The PID# field should reference the property entry of the same type as the corresponding PTYPE.
  4. This card is represented as a load collector in HyperMesh.