![Theses and Dissertations](../../assets/md5images/007ba8c2f9f7b20b26ed4b229bc29542.jpg)
Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Felicelli, Sergio D.
Committee Member
Lacy, Thomas E.
Committee Member
Rhee, Hongjoo
Date of Degree
8-11-2012
Document Type
Graduate Thesis - Open Access
Major
Mechanical Engineering
Degree Name
Master of Science
College
James Worth Bagley College of Engineering
Department
Department of Mechanical Engineering
Abstract
A thermo-mechanical finite element model is developed to determine the temperature history and residual stresses in a Cu-H13 thin-walled plate deposited by the Laser Engineered Net Shaping (LENSTM) process. The same model is also applied to a H13-H13 sample to compare the results. The input laser power is adjusted to maintain a steady molten pool size and depth. For a constant scanning speed the laser power decreases with the addition of more layers, and with the increase of scanning speed the laser power needs to be increased. The Z-component of residual stresses is greater than the other components, and is compressive near the center of the wall and tensile at the free edges. The residual stress levels near the free edges are higher in the H13-H13 sample than in the Cu-H13 sample. In these regions, the use of unidirectional scanning results in a higher stress accumulation than the alternating scanning.
URI
https://hdl.handle.net/11668/20145
Recommended Citation
Talukdar, Tushar K., "Thermo-mechanical Analysis of LENS [Trademark] Deposited Bimetallic (Steel-Copper) Parts" (2012). Theses and Dissertations. 4716.
https://scholarsjunction.msstate.edu/td/4716