Numerical simulation of laser cavitation impact copper foil micro-forming

A micro-forming model of laser cavitation impact foil was established by Abaqus software. The deformation process and mechanical effect of laser cavitation impact on the formability of copper foil were studied. The results show that the micro-forming process of copper foil consists of four stages, namely, the forming stage under the action of plasma shock wave, the rebound stage, the collision stage between copper foil and mold under the action of bubble collapse pressure load, and the rebound stage. The deformation velocity of the material is positively correlated with the distance from the center, and the strain change is more obvious at the rounded corner of the copper foil. The forming depth and bottom fitting area of copper foil are positively correlated with laser energy. The forming area of the material and the concave mold increases with the increase of the radius of the concave mold. The bubble collapse pressure load plays a leading role in the whole laser cavitation impact forming process.