PFATSMW
Bulk Data Entry Defines properties for Seam Weld Fatigue Analysis.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
PFATSMW | ID | BRATIO | TREF | TREF_N | EVALDIS |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
ID | Each
PFATSMW card must have a unique ID. This
ID may be referenced from a FATDEF definition. No default (Integer > 0) |
|
BRATIO | Critical bending
ratio. Default = 0.5 (Real > 0.0) |
|
TREF | Reference thickness
for thickness effect consideration. 1 Default = 25.0 (Real > 0.0) |
|
TREF_N | Exponent for the
thickness effect consideration. 1 Default = 0.2 (Real ≥ 0.0) |
|
EVALDIS | Evaluation distance in
Joint Line method. 2
(Real ≥ 0.0) |
Comments
- TREF is used to define
the reference thickness for thickness effect consideration. If the thickness of
a shell (T) is greater than the specified value
(TREF), and the THCKCORR field on the
FATPARM entry is set to YES, then the
thickness effect is included by increasing the stress (
) based on:
- The distance at which the stresses are evaluated for a particular weld is defined by EVALDIS. The stresses are actually evaluated at the element corners (based on STRESS output request or PARAM,CNST4FAT), and then the stresses are interpolated to the stress evaluation point (Figure 1) for each element. This stress is used in further fatigue calculations.