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Modelling of temperature field and residual stress of vacuum brazing for stainless steel plate-fin structure
Authors:Wenchun Jiang  Jianming Gong  Shandong Tu  Hu Chen
Affiliation:1. Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou, 510640, PR China;2. National Engineering Research Center of Near-net-shape Forming Technology for Metallic Materials, South China University of Technology, Guangzhou, 510640, PR China;3. Dongguan Hyperpowder Co. Ltd., Dongguan, 523808, PR China;1. School of Mechanical and Power Engineering, Nanjing Tech University, JiangSu Province, China;2. Jiangsu Key Engineering Laboratory of Process Industrial Energy Conservation and Environmental Protection Technology and Equipment, JiangSu Province, China;3. Jiangsu Key Laboratory of Process Enhancement & Energy Equipment Technology, JiangSu Province, China;4. School of Mechanical and Power Engineering, East China University of Science and Technology, ShangHai, China;1. Corporación Mexicana de Investigación en Materiales S.A. de C.V., Ciencia y Tecnología No. 790, Fracc. Saltillo 400, Saltillo, Coah, CP 25290, Mexico;2. Cinvestav IPN Unidad Saltillo, Ave. Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coah, CP 25900, Mexico;3. Cinvestav IPN Zacatenco, Programa de Doctorado en Nanociencias y Nanotecnología (DNN), Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, Gustavo A. Madero, 07360 Ciudad de México, Distrito Federal, Mexico;1. Department of Mechanical Engineering, Anna University, Regional Campus Madurai, Madurai 625 019, India;2. Department of Mechanical Engineering, K. Ramakrishnan College of Engineering, Trichy 621 112, India;3. Department of Mechanical Engineering, Sethu Institute of Technology, Pulloor, Kariapatti 626115, India
Abstract:This paper presented a finite element (FE) modeling of the temperature field and residual stress of the vacuum brazing for a counterflow stainless steel plate-fin structure. A sequential coupling calculation procedure was developed by using commercial program ABAQUS. The brazing temperature field and brazed residual stress distribution regularities have been successfully achieved. The results show that the brazed joint suffers high tensile residual stress and the fillets become the weakest zone. In the plate, the longitudinal stress is large and would have to play the main role on strength while the transverse and shear stress are very small. The residual stresses in fin are complex and their distribution in the parallel fin is much different from that of vertical fin. These results provide the theoretical knowledge for the optimization of process and the control of brazed residual stresses for stainless steel plate-fin structure.
Keywords:
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