TY - JOUR A1 - Pittner, Andreas A1 - Karkhin, Victor A1 - Rethmeier, Michael T1 - Reconstruction of 3D transient temperature field for fusion welding processes on basis of discrete experimental data T2 - Welding in the world N2 - This paper presents an approach to reconstruct the three-dimensional transient temperature field for fusion welding processes as input data for computational weld mechanics. The methodology to solve this inverse heat conduction problem fast and automatically focuses on analytical temperature field models for volumetric heat sources and application of global optimisation. The important issue addressed here is the question which experimental data is needed to guarantee a unique reconstruction of the experimental temperature field. Different computational-experimental test cases are executed to determine the influence of various sets of discrete experimental data on the solvability of the optimisation problem. The application of energy distributions utilised for laser beam welding allows reconstructing the temperature field efficiently. Furthermore, the heat input into the workpiece determined by the simulation contributes to the evaluation of the thermal efficiency of the welding process. PB - Springer CY - Oxford KW - Welding KW - Temperature KW - Analysis techniques KW - Optimisation KW - Laser beams KW - Hybrid laser arc welding PY - 2015 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/33730 AN - OPUS4-33730 SN - 0043-2288 SN - 1878-6669 VL - 59 IS - 4 SP - 497 EP - 512 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany