Heidari, A., Forouzan, M., Golestaneh, J. (2008). An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 1(3), 1-16.
Ali Heidari; Mohammad Reza Forouzan; Jafar Golestaneh. "An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 1, 3, 2008, 1-16.
Heidari, A., Forouzan, M., Golestaneh, J. (2008). 'An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 1(3), pp. 1-16.
Heidari, A., Forouzan, M., Golestaneh, J. An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2008; 1(3): 1-16.
An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process
1- Lecturer, Mechanical Engineering Faculty, Islamic Azad University, Khomeinishahr Branch
2Assistant Professor, Mechanical Engineering Faculty, Isfahan University of Technology
3M.Sc., Sadid Pipe and Equipment Co., Tehran
Abstract
Many researchers content themselves with the 2D simulation of welding process instead of the 3D simulation, because of the time and the cost factors of the latter. In this research, the number of elements and nodes are reduced by an initiative plan (defining an equivalent model) for the simulation of welding. The welding process has been simulated by an uncoupled thermal-mechanical finite element model in three steps. Thermal history was determined from thermal analysis, and then the distribution of the metallurgical phase on the fusion and heat affected zones were calculated by a certain code. Afterward, the stress distribution was computed from mechanical analysis, where the material property was defined element by element according to the second step. One of the most important objectives of this simulation is to study the residual stresses of welding. Comparisons between the thermal analysis results and the metallographic and laboratory results of this research show acceptable accuracy of the proposed method.
طرح ابتکاری مدل معادل برای شبیه‌سازی فرایند جوشکاری
Authors [Persian]
علی حیدری, محمدرضا فروزان, جعفر گلستانه
Abstract [Persian]
بسیاری از محققان بدلیل زمان و هزینه بالای شبیه‌سازی سه‌بعدی جوشکاری تنها به حل دوبعدی آن اکتفا می‌کنند. در این تحقیق با ارائه یک طرح ابتکاری (تعریف یک مدل معادل برای شبیه‌سازی جوشکاری)، تعداد المان‌ها و گره‌ها را کاهش داده و در نتیجه زمان حل را کاهش و تا حد زیادی مشکلات حل‌های سه‌بعدی را برطرف نموده‌ایم. شبیه‌سازی فرایند جوشکاری زیرپودری به کمک روش اجزاء محدود با تحلیل غیر کوپله حرارتی و مکانیکی در سه مرحله به انجام رسیده است. در مرحله اول از حل حرارتی تاریخچه دمایی مشخص شده و سپس در مرحله دوم توزیع فازهای متالورژیکی در نواحی ذوب و متاثر از جوشکاری محاسبه می‌شود. نهایتاً در مرحله سوم از حل مکانیکی، توزیع تنش به‌دست می‌آید که خاصیت ماده برای هر المان با توجه به فاز مشخص شده در مرحله دوم به آن اختصاص می‌یابد. یکی از مهمترین اهداف این شبیه‌سازی، بررسی تنش‌های پسماند حاصل از جوشکاری می‌باشد. مقایسه‌ای بین نتایج حرارتی حاصل شده از برنامه با نتایج متالوگرافی و آزمایشگاهی این تحقیق صورت گرفته است که گویای دقت بالای برنامه است.
Keywords [Persian]
فرایند جوشکاری، روش اجزاء محدود، مدل معادل، تنش پسماند
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