Abstract
The aim of this present study is to investigate thermal stresses inside a thin anisotropic mild steal plate during moving line heat source. The parabolic heat conduction model is used for the prediction of the temperature history. The temperature distributions are determined numerically using finite difference method. Thermal stresses are computed numerically. It is found that the thermal conductivity ratio affect in both temperature and thermal stresses distributions, in additional to the speed and heat source intensity.
Highlights
Heat conduction problems in anisotropic material have numerous important applications in various branches of science; that is the thermal conductivity varies with direction
It was found that welding speed and heat source intensity are the main factors that affect the residual stress formation in the plate
Analysis: Formulation of heat equation: Figure 1 shows a schematic diagram of the physical domain for a square thin anisotropic metal plate with moving plane heat source
Summary
Heat conduction problems in anisotropic material have numerous important applications in various branches of science; that is the thermal conductivity varies with direction. It was found that welding speed and heat source intensity are the main factors that affect the residual stress formation in the plate. Al-Nimr and Naji (2000) described the thermal behavior of anisotropic material using hyperbolic heat conduction model, which assumed different phase lags between each component of the heat flux vector and the summation of temperature gradient in all direction of the orthogonal coordinate system. Hou and Komanduri (2000) presented general solution for temperature rise at any point due to stationary/moving plane heat source of different shapes and heat intensity distributions (uniform, parabolic, rectangular and normal) using the Jaeger’s classical heat source method. The hyperbolic heat conduction model was used to predict the temperature history They presented the effect of different parameters such as moving source speed and the convection heat transfer. The results shows for the butt joint that the maximum residual longitudinal normal stress was within 3.6% of published data and for a fully
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