Type of Document	Thesis
Author	Vepakomma, Krishna Hemanth
URN	etd-04102006-165435
Title	Three Dimensional Thermal Modeling of Friction Stir Processing
Degree	Master of Science
Department	Mechanical Engineering, Department of
Advisory Committee	Advisor Name Title Peter N. Kalu Committee Chair Namas Chandra Committee Co-Chair Juan Carlos Ordóñez Committee Member
Keywords	Friction Stir Processing; Finite Element Analysis;
Date of Defense	2006-03-17
Availability	unrestricted
Abstract It has been documented that heat is generated during friction stir processing. The amount of heat generated between the shoulder and the work piece during friction stir processing dictates the quality of the processed zone. Hence understanding the distribution of heat and obtaining the temperature contours will assist in understanding the general process of friction stir processing. In this thesis a three dimensional heat transfer model has been developed to obtain the temperature distribution in the work piece. An example problem was solved to understand the method of solving a transient heat transfer problem using ANSYS. The developed finite element model was validated by comparing the simulation results with experimental data from five different papers. A parametric study was carried out to understand the variation in temperature for different rotational and translational speeds. The variation of temperature with respect to thermal conductivity, specific heat and density was developed. A trend line equation which predicts the peak temperature attained during friction stir processing was also developed. The predicted peak temperature is used to obtain the temperature contours through out the work piece.
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