Author(s): G.Hanumantharao , S.Vijay, Dr.M.Venkateswara Rao
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Vol.1 - Issue 6 (August- 2012)
This project investigated the thermal stresses of aluminum plate welded by gas tungsten arc (GTA) in boilers and pressure vessels. The heat of fusion, the size and distribution of heat source, the travel speed, the heat conduction in the welding direction and the surface heat loss during welding were considered. Simulation was carried out on a plate made of Aluminum having dimensions 0.05¡ß0.05¡ß0.005 meters. Single pass welding was carried out. Simulation values calculated were taken as input for the analysis in ANSYS software. A model was generated in ANSYS12.0 (general purpose FEA software) using SOLID 98. A refined mesh is made based on the convergence criteria and the analysis is performed to estimate the thermal stresses. Couple field analysis using structural load of pressure 4N/mm2 on areas and thermal loads of 2500 kJ is carried out by giving heat flux as the time varying input to estimate the thermal stresses, thermal strain, displacement and temperature gradient variations .The non linear material properties are fed for the heat flow solution to get the thermal stresses. The variation of the temperature gradient with time, and thermal stress are obtained. The variation of these are reported and discussed. The present analysis is used to calculate thermal gradients thereby reduce thermal stresses for the optimum temperature distribution in aluminum welded joints.
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