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
MINAVG (Default)
Automatically determine the evaluation distance from the weld line for Stress calculation.
Real
The specified Real value is directly used as the evaluation distance from the Weld line for Stress calculation.
blank

(Real ≥ 0.0)

1. 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 ( ${\sigma }_{ij}$ ) based on:(1)
${\sigma }_{\mathit{ij}}={\sigma }_{\mathit{ij}}{\left(\frac{T}{\mathit{TREF}}\right)}^{\mathit{TREF}_N}$