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钎焊降温速率对板翅结构钎焊残余应力和等效热变形的影响规律
引用本文:代忠华,刘新文,麻宏强,王丽,张春娥. 钎焊降温速率对板翅结构钎焊残余应力和等效热变形的影响规律[J]. 兰州理工大学学报, 2022, 48(1): 65-70. DOI: 10.3969/j.issn.1673-5196.2022.01.011
作者姓名:代忠华  刘新文  麻宏强  王丽  张春娥
作者单位:1.甘肃第四建设集团有限责任公司, 甘肃 兰州 730050;
2.甘肃建投科技研发有限公司, 甘肃 兰州 730050;
3.兰州理工大学 土木工程学院, 甘肃 兰州 730050
基金项目:十三五重大科技攻关项目
摘    要:为了研究不同钎焊降温速率对板翅结构内部的钎焊残余应力和等效弹性热应变的影响规律.建立了板翅结构的三维热应力分析模型,采用热-结构耦合的方法,模拟分析了不同钎焊降温速率下,钎焊残余应力和等效弹性热应变的变化情况.研究结果表明:板翅结构内部的钎焊残余应力随着钎焊降温速率的减小而减小;不同钎焊降温速率下,板翅结构内部的钎焊残...

关 键 词:钎焊降温速率  板翅结构  钎焊残余应力  等效弹性热应变
收稿时间:2021-04-26

Effect of cooling rate on residual stress and equivalent thermal deformation of brazed plate-fin structures
DAI Zhong-hua,LIU Xin-wen,MA Hong-qiang,WANG Li,ZHANG Chun-e. Effect of cooling rate on residual stress and equivalent thermal deformation of brazed plate-fin structures[J]. Journal of Lanzhou University of Technology, 2022, 48(1): 65-70. DOI: 10.3969/j.issn.1673-5196.2022.01.011
Authors:DAI Zhong-hua  LIU Xin-wen  MA Hong-qiang  WANG Li  ZHANG Chun-e
Affiliation:1. Gansu Fourth Construction Group Co., Ltd. Lanzhou 730050, China;
2. Gansu Construction Investment Technology R&D Co., Ltd. Lanzhou 730050, China;
3. School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China
Abstract:In order to study the effect of different brazing cooling rate on the brazing residual stress and equivalent elastic thermal strain of plate-fin structure, a three-dimensional thermal stress analysis model of plate-fin structure is established, and the variation of brazing residual stress and equivalent elastic thermal strain under different brazing cooling rates are simulated and analyzed using the thermal-structural coupling method. The results show that the brazing residual stress of fin-structure is decreased with the decrease of the brazing cooling rate. The difference between the brazing residual stresses of the plate-fin structure is also different for different brazing cooling rates, and when the brazing cooling rate is less than a certain value, the brazing residual stress of the plate-fin structure will be approximately constant. The smaller the brazing cooling rate, the smaller the risk of fracture in the weak parts of the plate-fin structure. The brazing cooling rate has little effect on the equivalent elastic thermal strain of the plate-fin structure.
Keywords:brazing cooling rate  plate-fin structure  brazing residual stress  equivalent elastic thermal strain  
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