Finite Element Analysis of Pre-pressing Phase during Aluminum Alloy Spot Welding

The preloading contact analysis is the basis of thermoelectric analysis during resistance spot welding.According to elastic-plastic theory and contact theory,based on the geometrical characteristic and pressing characteristic in welding process,an axisymmetric finite element model for preloading contact analysis was established.The preloading contact behavior was simulated and the influence law of electrode pressure on preloading contact behavior was analyzed.