Residual Stress Distribution For A Single Pass Weld In Pipe | ||
| Journal of Engineering | ||
| Article 1, Volume 16, Issue 1, March 2010, Pages 4618-4630 | ||
| Authors | ||
| Osama F. Abd Al Latteef; Nabeel K. Abid Al-Sahib; Adnan N. Jameel | ||
| Abstract | ||
| Heat input due to the welding of mild steel pipe causes a temperature gradient in the parent metal. After welding and temperature cooling down, residual stresses appear around welding zone which reduces the weld strength. Residual stresses are a result of the temperature gradient and the dependency of material properties on the temperature, such as yield strength, elasticity modulus, and thermal expansion coefficient. In this study, a typical flat joint of a single pass weld in a thin pipe was studied analytically and numerically. Analytical approach is performed by exploring a simple method to calculate the magnitude of residual stress in terms of the weld shrinkage behavior. Numerical analysis is performed by applying non-linear transient heat transfer analysis using welding parameters, such as heat generation, free or force convection with ambient, are performed using a general purpose FE package ANSYS 8.0 in order to obtain the temperature distribution in the welded parts. A non-linear thermal-elastic-plastic stress analysis is then performed using the same package to predict the stress fields during and after welding. | ||
| Keywords | ||
| Residual Stress; Weld Pipe; thermo; elasto; Plasticity | ||
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