Numerical Analysis of Thermal Stress and Deformation in Multi-Layer Laser Metal Deposition Processes
Abstract
Direct metal deposition (DMD) has gained increasing attention in the area of rapid manucooling rate, resulting in residual stresses and distortion. This paper presents a 3D sequentially coupled thermo-mechanical finite element model to predict residual stresses and deformations. The temperature distribution, thermal stress field and geometry deformation across domain are illustrated. The effect of deposition parameters on residual stress and deflections are also explored. A set of validation experiments for mechanical effects were conducted using laser displacement sensor. The comparisons between the simulated and experimental results show good agreement
Recommended Citation
H. Liu et al., "Numerical Analysis of Thermal Stress and Deformation in Multi-Layer Laser Metal Deposition Processes," Proceedings of the 24th Annual International Solid Freeform Fabrication Symposium (2013, Austin, TX), pp. 577 - 591, University of Texas at Austin, Aug 2013.
Meeting Name
24th Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2013: Aug. 12-14, Austin, TX)
Department(s)
Mechanical and Aerospace Engineering
Research Center/Lab(s)
Intelligent Systems Center
Document Type
Article - Conference proceedings
Document Version
Final Version
File Type
text
Language(s)
English
Publication Date
14 Aug 2013
Comments
This research was partially supported by Boeing Company. Support from Missouri S&T’s Intelligent Systems Center, Material Research Center, and Manufacturing Engineering program is also greatly appreciated.