Spot Weld Strength Determination Using the Wedge Test: In Situ Observations and Coupled Simulations
This paper describes an innovative way to characterize the strength of spot welds. A wedge test has been developed to generate interfacial failures in weldments and observe in-situ the crack propagation. An energy analysis quantifies the spot weld crack resistance. Finite Element calculations investigate the stresses and strains along the crack front. A comparison of the local loading state with experimentally observed crack fronts provides the necessary data for a failure criterion in spot weld fusion zones. The method is applied to spot welds of Advanced High Strength steels.
R.A.W. Mines and J.M. Dulieu-Barton
R. Lacroix et al., "Spot Weld Strength Determination Using the Wedge Test: In Situ Observations and Coupled Simulations", Applied Mechanics and Materials, Vols. 24-25, pp. 299-304, 2010