visualizer

FEMFAT weld

For the modern development of welded structures, a precise fatigue life prediction of these joints has become indispensable. FEMFAT weld assists you with this.

In the determination of the fatigue life or safety factors of welded structures, you can count on the flexibility provided by FEMFAT weld: the methods implemented enable simultaneous analysis of shell and solid models.
The tedious, detailed modeling of the weld geometry with fillets for the weld root and weld toe can be omitted entirely.

The weld definition can be carried out conveniently in FEMFAT visualizer for shell-shell and shell-solid connections – even independently of the FE analysis.
For the fatigue analysis, the FE structural stresses are scaled up to obtain notch stresses by means of notch factors taken from a database and are then analyzed. The database is provided in ASCII format. Consequently, you can modify the notch factors and material parameters contained there to obtain an even better prediction quality or add new joints.

The SolidWELD method, on the other hand, uses a “critical distance” approach for the analysis. Here, the stresses are determined at a certain depth (which can be specified by the user) using interpolation and are compared to a master S/N curve which is based on many tests.
The ANSA preprocessor ensures maximum user friendliness by automatically generating the weld joint and all of the definitions required for the WELD analysis. However, the definitions can also be performed with any other preprocessors as well.

The impressive scope of functions in WELD also includes sensitivity analysis for identifying critical weld geometry parameters as well as standards-compliant assessment options, according to BS7608 or Eurocode 3. 

The FEMFAT weld module can be used in combination with BASIC, MAX and SPECTRAL.