A Thermal and Mechanical Model of Laser Cladding

186 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2004.2D and 3D FE lagrangian models were developed using the Abaqus(TM) software. Simulation results were obtained for a system (cladding of C95600 copper on AA333 aluminum alloy) in which experiments had been successfully carried out. A simple model of dilution, i.e. the change in local composition due to mixing, is included. In 3D stress analysis, numerical convergence is seen to be a critical issue. A recommendation is made for modeling of LC and similar processes: (1) use 2D models to swiftly explore parameter space; (2) carry out 3D temperature simulations, with meshes matching the process geometry (curved boundaries) and; (3) perform the stress analysis with more regular meshes (with overall planar boundaries) that are more likely to lead to convergence.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

A Thermal and Mechanical Model of Laser Cladding

186 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2004.2D and 3D FE lagrangian models were developed using the Abaqus(TM) software. Simulation results were obtained for a system (cladding of C95600 copper on AA333 aluminum alloy) in which experiments had been successfully carried out. A simple model of dilution, i.e. the change in local composition due to mixing, is included. In 3D stress analysis, numerical convergence is seen to be a critical issue. A recommendation is made for modeling of LC and similar processes: (1) use 2D models to swiftly explore parameter space; (2) carry out 3D temperature simulations, with meshes matching the process geometry (curved boundaries) and; (3) perform the stress analysis with more regular meshes (with overall planar boundaries) that are more likely to lead to convergence.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD