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https://hdl.handle.net/2142/83807
Description
Title
A Thermal and Mechanical Model of Laser Cladding
Author(s)
De Deus, Augusto Moita
Issue Date
2004
Doctoral Committee Chair(s)
Mazumder, Jyotirmoy
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Language
eng
Abstract
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.
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