小冲杆试验评价平板式固体氧化物燃料电池钎焊密封接头力学性能研究

doi:10.3901/JME.2021.10.178

机械工程学报 ›› 2021, Vol. 57 ›› Issue (10): 178-186.doi: 10.3901/JME.2021.10.178

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小冲杆试验评价平板式固体氧化物燃料电池钎焊密封接头力学性能研究

宋明¹, 马帅¹, 蒋文春², 杜传胜³, 王炳英³

1. 中国石油大学(华东)储运与建筑工程学院青岛 266580;
2. 中国石油大学(华东)新能源学院青岛 266580;
3. 中国石油大学(华东)材料科学与工程学院青岛 266580

收稿日期:2020-06-25 修回日期:2021-01-01 出版日期:2021-05-20 发布日期:2021-07-23
通讯作者: 蒋文春(通信作者),男,1980年出生,博士,教授,博士研究生导师。主要研究方向为新能源设备与结构完整性技术。E-mail:jiangwenchun@126.com
作者简介:宋明,男,1984年出生,博士,讲师,硕士研究生导师。主要研究方向为先进能源材料与装备、压力容器与管道结构完整性技术。E-mail:songmingx@gmail.com
基金资助:
国家自然科学基金（51805543）、山东省自然科学基金（ZR2019MEE108，ZR2017BEE037）和中央高校基本科研业务费专项（18CX05002A）资助项目。

Evaluating Mechanical Properties of Brazed Seal Joint of Planar Solid Oxide Fuel Cell by Small Punch Test

SONG Ming¹, MA Shuai¹, JIANG Wenchun², DU Chuansheng³, WANG Bingying³

1. School of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580;
2. School of New Energy, China University of Petroleum (East China), Qingdao 266580;
3. School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580

Received:2020-06-25 Revised:2021-01-01 Online:2021-05-20 Published:2021-07-23

摘要/Abstract

摘要： 如何获得钎焊接头钎缝的力学性能一直以来是一个难题。通过小冲杆试验获得了平板式固体氧化燃料电池304不锈钢密封钎焊接头三明治结构弹塑性力学性能，并建立了含有Gurson-Tvergaard-Needleman （GTN）损伤参数的钎焊接头小冲杆试样有限元模型，采用试验与有限元分析结合的方法，利用逆向求解法获得了使用常规试验方法无法得到的接头钎缝的屈服强度、抗拉强度及损伤参数，并通过不同厚度的钎焊焊缝小冲杆试验验证了有限元模型的正确性。同时研究了304不锈钢钎焊接头的断裂行为，结果表明钎缝的强度较母材差，钎缝厚度的增加会使得接头整体的承载能力减小。研究结果能够为平板式固体氧化物燃料电池钎焊自适应密封结构强度研究提供可行的试验方法和数据。

关键词: 钎焊接头, 小冲杆试验, GTN模型, 有限元分析, 断裂行为

Abstract: Obtaining the mechanical properties of the brazing seal of brazed joint is always a challenge. The elastoplastic mechanical properties of the whole sandwich structure of 304 stainless steel brazed joint of planar solid oxide fuel cell are obtained by small punch test, and the corresponding finite element model of the small punch specimen with the damage parameter of Gurson-Tvergaard-Needleman (GTN) is established. The method combining experimental and finite element analysis is used to obtain the yield strength, ultimate tensile strength and relevant damage parameters of the brazed joint, which are not able to be obtained by conventional testing methods. The validity of the finite element model is verified by the small punch tests of the brazed joints with different thickness brazing seam. Meanwhile, the fracture behavior of the 304 stainless steel brazed joint are investigated. The results show that the mechanical properties of the brazed joint are weaker than that of the parent metal. The increase of the thickness of the brazing seam will reduce the strength of the integrated brazed joint. The results of the present work are able to provide feasible methods and data for studying the strength of adaptive sealing structure of planar solid oxide fuel cell.

Key words: brazed joint, small punch test, GTN model, finite element analysis, fracture behavior

中图分类号:

TM911

宋明, 马帅, 蒋文春, 杜传胜, 王炳英. 小冲杆试验评价平板式固体氧化物燃料电池钎焊密封接头力学性能研究[J]. 机械工程学报, 2021, 57(10): 178-186.

SONG Ming, MA Shuai, JIANG Wenchun, DU Chuansheng, WANG Bingying. Evaluating Mechanical Properties of Brazed Seal Joint of Planar Solid Oxide Fuel Cell by Small Punch Test[J]. Journal of Mechanical Engineering, 2021, 57(10): 178-186.

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小冲杆试验评价平板式固体氧化物燃料电池钎焊密封接头力学性能研究

Evaluating Mechanical Properties of Brazed Seal Joint of Planar Solid Oxide Fuel Cell by Small Punch Test

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