Spot Weld


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. The spot welds are modeled by stiff beam elements (e.g., NASTRAN CBAR) and the creation of these welds in this form is supported by many leading FE pre-processors. CWELD and ACM formulations using solid element representation are also supported.
DesignLife can automatically identify all the related model information from these welds to make job setup and solution quick and simple. Cross-sectional forces and moments are used to calculate structural stresses around the edge of the weld.
Life calculations are made around the spot weld at multiple angle increments and the total life reported includes the worst case. Materials data that is provided can be generally applied to many spot weld cases.
Python scripting also enables modelling other jointing methods such as rivets or bolts.
        
  • Spot welds are modelled by stiff beam elements (e.g. NASTRAN CBAR) as supported by many leading FE pre-processors.
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  • Also supported – CWELD, ACM formulations using solid elements.
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  • Cross sectional forces and moments are used to calculate structural stress around the edge of the weld spot.
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  • Life calculations are made around spot weld using linear damage summation and reporting worst case.
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  • Python scripting is also available for modelling other jointing methods such as rivets or bolts.
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