The Spot Weld option enables the fatigue analysis of spot welds in thin sheets. The approach is based on the LBF method (see SAE paper 950711) and is well-suited to vehicle structure applications.
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Spot welds are modelled by:
Stiff beam elements (e.g., NASTRAN CBAR), as supported by many leading FE pre-processors
Supports CWELD and ACM formulations using solid element representation
Cross sectional forces and moments are used to calculate structural stress around the edge of the weld
Life calculations are made around spot weld at multiple angle increments and the total life reported includes the worst case
Python scripting enables modelling of other joining methods such as rivets or bolts
