An approach for modelling thermo-mechanical responses in a 3D arc welding process is developed using the Smoothed Particle Hydrodynamics (SPH) method. It is demonstrated for a simple arc welding configuration by using full three-dimensional elastoplastic analysis. The flow pattern of the filler material and the resulting plastic strain distribution are analysed. The effect of welding speed on t...

The causes of longitudinal crack in gas pipeline during pressure were analyzed by means mechanical property test, microstructure analysis, sem analysis and energy spectrum analysis. results show that the leakage L415M spiral submerged arc welded pipe is caused contact between base material steel low-melting copper alloy process high temperature, resulting brittleness liquid metal. Specifically,...