Abstract
This paper investigates the angular distortion induced by the gas metal arc welding (GMAW) process on the combined butt and T-joint with a thickness of 9 mm. The material used in this study was low manganese carbon steel S355J2G3. A 2-D and 3-D thermo-elastic-plastic finite element (FE) analysis has been developed to simulate the induced distortion of multipassed welding. In this research, SYSWELD 2010 with its computation management tool, known as multipassed welding advisor (MPA), was applied to analyze the distortion behavior of combined joint types. To model the heat source of GMAW, Goldak's double ellipsoid representation, which is available within this finite element analysis (FEA) code was selected. Prior to the results discussion, this paper also shows the step-bystep procedures to simulate combined jointing which begins with metallurgical and customized heat source modeling, and is followed by creating geometrical mesh using Visual-Mesh 6.5 for analyzing and processing the results. Apart from 2-D and 3-D comparison analysis, the final objective of this research is also aimed to be a baseline study to provide preliminary information in preparing the tools and equipment for experimental investigation.
Highlights
Solar hot water systems function as heat exchangers
The performance of solar systems varies as the design variables change, so it is necessary to identify the parameters affecting this design and the operational variables
Khalifa (1999) investigated a thermosyphon domestic hot water system to show the important variables that affect the performance of the solar system such as the temperature variation along the absorber fins, tubes and in the flow direction as well as the thermosyphonic mass flow rate
Summary
Solar hot water systems function as heat exchangers. They receive solar radiant energy and transfer it to the flowing fluid. Keltt et al (1984) studied through experimentation the thermal performance of submerged coil heat exchangers for single wall coil and double wall coil for different tank sizes namely (300 L and 450 L) for different load flow rates. Khalifa (1999) investigated a thermosyphon domestic hot water system to show the important variables that affect the performance of the solar system such as the temperature variation along the absorber fins, tubes and in the flow direction as well as the thermosyphonic mass flow rate. The design of an efficient storage tank heat exchanger has been investigated by (Shokouhmand et al 2008) with different coil pitches and curvature ratios. In order to carry out a fair comparison, the collectors are made as identically possible
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