چکیده مقاله
Abstract Welding is a crucial manufacturing process and widely used in industries to assemble various products including ships, automobiles, trains and bridges Welding distortion often results in problems such as dimensional inaccuracies during the assembly and increased fabrication costs Welding distortion during the assembly process is affected by local shrinkage due to rapid heating and cooling The study uses the example of butt welding thin rectangular plates, the results of main interest being the temperature distribution In this study, both the finite difference method FDM and finite element method FEM are utilized to investigate the temperature field in two plates Firstly, 2 D symmetric finite difference model is developed to simulate the welding temperature field Secondly, the finite element model is developed to precisely predict temperature distribution In both the FDM and FEM, the temperature dependant material properties are taken into account Finally, the FDM results are compared with FEM data to investigate the effect of solution method in predicting heat distribution in thin welded structures Also experiments are carried out to verify the simulated results It is found that the solving method has moderate influence on predicting temperature field The maximum magnitude of temperature at nodes near the weld line in FDM is less than that in FEM Also, temperature gradient in FDM is larger than that in FEM, and therefore results in a more critical welding condition So in conservative designs FDM is more desirable However, FEM has advantage in reducing the solving time The effectiveness of the proposed FEM is confirmed using experimental values
کلیدواژهها
نویسندگان
M. M. Mashadi
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
I. Heidari
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
R. Delshadi
Faculty of Mechanical Engineering, Iran University of Science and Technology, Arak, Iran
شیوه ارجاع
Mashadi, M. M. and Heidari, I. and Delshadi, R.,1390,Determination of Welding Temperature Distribution in Sheet Metals by Means of Finite Difference and Finite Element Methods and Comparison with Experimental Measurements,12th Iranian Conference on Manufacturing Engineering (ICME 2010),Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران6 دی 1390 · تهران