基于主S-N曲线法的搅拌摩擦焊接头疲劳性能分析

刘杰; 屈志军; 于谊飞; 王硕

doi:10.7512/j.issn.1001-2303.2022.04.06

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基于主S-N曲线法的搅拌摩擦焊接头疲劳性能分析
Fatigue Performance Analysis of Friction Stir Welded Joints Based on Master S-N Curve Method
2022年52卷第4期页码：36-43
DOI： 10.7512/j.issn.1001-2303.2022.04.06

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刘杰，屈志军，于谊飞，等.基于主S-N曲线法的搅拌摩擦焊接头疲劳性能分析［J］.电焊机，2022，52（4）：36-43.

LIU Jie, QU Zhijun, YU Yifei, et al.Fatigue Performance Analysis of Friction Stir Welded Joints Based on Master S-N Curve Method[J].Electric Welding Machine, 2022, 52(4): 36-43.
刘杰，屈志军，于谊飞，等.基于主S-N曲线法的搅拌摩擦焊接头疲劳性能分析［J］.电焊机，2022，52（4）：36-43. DOI： 10.7512/j.issn.1001-2303.2022.04.06.

LIU Jie, QU Zhijun, YU Yifei, et al.Fatigue Performance Analysis of Friction Stir Welded Joints Based on Master S-N Curve Method[J].Electric Welding Machine, 2022, 52(4): 36-43. DOI： 10.7512/j.issn.1001-2303.2022.04.06.

摘要

对壁厚4.0 mm的6005A-T6铝合金侧墙型材实施搅拌摩擦焊，分析焊后接头组织和疲劳性能，讨论了不同疲劳试验方案的可行性。采用等效结构应力计算法与Abaqus有限元分析相结合的方法，研究基于主S-N曲线法的铝合金型材搅拌摩擦焊接头疲劳性能，结果表明：设计L型卡具加载方案可行，试验夹具加载方式的不同对接头疲劳性能存在一定的影响；短螺栓L型卡具辅助弯曲疲劳试验可以很好地规避螺栓连接的影响，并且可实现预期的接头焊根位置开裂失效模式。对搭接接头在承受较为苛刻的载荷环境下，尤其焊根缺口位置出现较高应力集中时，疲劳寿命下降比较严重。经对疲劳试样断口分析，冷搭位置不具备连接强度。

Abstract

Friction stir welding was applied on 6005A-T6 aluminum alloy side wall profiles with a wall thickness of 4.0 mm. The microstructure and fatigue properties of the joints after welding were analyzed, and the feasibility of different fatigue test schemes was discussed. By means of the research method combining equivalent structural stress calculation method and Abaqus finite element analysis, the fatigue performance of the friction stir welded joint of aluminum alloy profiles based on the main S-N curve method is studied. The results show that the L-shape fixture loading scheme is feasible and the test fixture is loaded with different methods have a certain influence on the fatigue performance of the joint.The short bolt L-shape fixture-assisted bending fatigue test can well avoid the influence of the bolted connection, and can achieve the expected cracking failure mode at the welding root position of the joint. The fatigue life of the lap joint is seriously reduced when the lap joint is subjected to a relatively harsh load environment, especially when there is a high stress concentration at the position of the weld root notch. According to the fracture analysis of the fatigue specimen, the cold lap position does not have the connection strength.

关键词

铝合金型材搅拌摩擦焊主S-N曲线法夹具加载形式疲劳性能

Keywords

aluminium alloy profilefriction stir weldingthe main S-N curve methodloading form of fixtureproperties

references

WANG Chunsheng， LIU Jie， WANG Hongxiao， et al，Application and Development Trend of New Welding Technology in Railway Vehicles Manufacturing Industry［J］. China Welding， 2015， 4（24）：9-14.

邓钢，刘杰. 轨道车辆铝合金车体焊接现状及搅拌摩擦焊新技术应用［J］.电焊机，2015，45（6）：137-140.

DENG Gang， LIU Jie. Present situation and application of new friction stir welding technology in the manufacture of aluminum alloy car body［J］. Electric Welding Machine，2015，45（6）：137-140.

Dong P，Hong J K，Prager M，et a1. The master S-N curve method：an implementation for fatigue evaluation of welded com ponents in the ASME B&PV code，section VIII，div 2 and API 579-1/ASME FFS-1［S］. New York：Welding Research Council，2010．

Dong P，Hong J K，De Jesus，et a1. Analysis of recent fatigue data using the structural stress procedure in ASME Div 2 rewrite ［S］. New York：American Society of Mechanical Engineers，2007．

国际标准化组织委员会（ISO）. ISO25239-2011. 铝合金搅拌摩擦焊焊接工艺规程及鉴定［M］. 瑞士：瑞士出版社，2011：3-5.

Dong P. A Structural stress definition and numerical implementation for fatigue analysis of welded joints［J］. Int. J. Fatigue， 2001，23：865-876.

刘杰，杨景宏，宫文彪，等. 35 mm厚板铝合金搅拌摩擦焊接头组织与性能研究［J］.焊接学报， 2012，33（6）：101-104.

LIU Jie， YANG Jinghong， GONG Wenbiao， et al. Microstructure and properties of 35 mm thickness aluminium alloy welded joint by friction stir welding［J］. Transactions of The China Welding Institution， 2012，33（6）：101-104.

Peng Dong ，Hongmei Li ，Daqian Sun， et al. Effects of welding speed on the microstructure and hardness in friction stir welding joints of 6005A-T6 aluminum alloy［J］. Materials and Design， 2013（45）： 524-531.

郄新哲，张桂源，宫文彪，等. 6082-T6 铝合金搅拌摩擦焊接头疲劳性能及断口特征研究［J］.长春工业大学学报，2017， 38（5）： 496-500.

QIE Xinzhe， ZHANG Guiyuan， GONG Wenbiao， et al. Study on fatigue performance and fracture characteristics of 6082-T6 aluminum alloy by friction stir welding［J］. Journal of Changchun University of Technology：Natural Science Edition， 2017， 38（5）： 496-500.

Pei X J，Dong P S. Xing S. A structural strain parameter for a unified treatment of bfatigue behaviors of welded components［J］. Int. J. Fatigue， 2019，124： 444-460.

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