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
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.
24th Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2013: Aug. 12-14, Austin, TX)
Mechanical and Aerospace Engineering
Intelligent Systems Center
Article - Conference proceedings
14 Aug 2013