| 基于网格不敏感结构应力的铝合金焊接接头疲劳性能分析 |
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| 引用本文： | 杨鑫华,赵峰,胡文浩,孙屹博.基于网格不敏感结构应力的铝合金焊接接头疲劳性能分析[J].大连铁道学院学报,2013(6):74-78. |
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| 作者姓名： | 杨鑫华 赵峰 胡文浩 孙屹博 |
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| 作者单位： | [1]大连交通大学材料科学与工程学院,辽宁大连116028 [2]大连交通大学交通运输工程学院,辽宁大连116028 [3]中国北车集团唐山轨道客车有限责任公司,河北唐山063035 |
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| 基金项目： | 国家自然科学基金资助项目（51175054）;教育部科学技术研究重点资助项目（210045）;辽宁省科技计划资助项目（2011220039）;辽宁省优秀人才支持计划资助项目（LR2012015） |
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| 摘 要： | 基于网格不敏感结构应力方法,对3A21、5A06、6061等铝合金焊接接头疲劳性能及影响因素进行研究.结果表明：网格不敏感结构应力方法较传统的名义应力方法,能更好地表征不同接头形式、材料、应力比及厚度等因素对焊接接头的疲劳影响.在应力比相同的情况下,接头板厚越小,疲劳性能越好;相同板厚条件下,应力比越小,疲劳性能越好;5A06铝合金焊接接头的疲劳性能普遍高于3A21铝合金焊接接头,但板厚相差较大时,疲劳性能主要取决于厚度因素的影响;同种材料在板厚及应力比相同的情况下,对接接头疲劳性能最好,十字接头次之,T型接头疲劳性能最差.
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| 关 键 词： | 铝合金 焊接接头 网格不敏感结构应力法 疲劳性能 影响因素 |
Fatigue Analysis of Aluminum Alloy Weld Joints Based on Mesh-Insensitive Structural Stress Methods |
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| YANG Xin-huaSchool of Materials Science and Engineering,Dalian Jiaotong University,Dalian,China ZHAO FengSchool of Traffic and Transportation Engineering,Dalian Jiaotong University,Dalian,China HU Wen-haoCNR Tangshan Railway Vehicle Co.,Ltd,Tangshan,China SUN Yi-bo.Fatigue Analysis of Aluminum Alloy Weld Joints Based on Mesh-Insensitive Structural Stress Methods[J].Journal of Dalian Railway Institute,2013(6):74-78. |
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| Authors: | YANG Xin-huaSchool of Materials Science and Engineering Dalian Jiaotong University Dalian China ZHAO FengSchool of Traffic and Transportation Engineering Dalian Jiaotong University Dalian China HU Wen-haoCNR Tangshan Railway Vehicle Co Ltd Tangshan China SUN Yi-bo |
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| Institution: | YANG Xin-hua(School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China) ZHAO Feng(School of Traffic and Transportation Engineering, Dalian Jiaotong University, Dalian 116028, China) HU Wen-hao(CNR Tangshan Railway Vehicle Co., Ltd,Tangshan 063035, China) SUN Yi-bo(School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China) |
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| Abstract: | The fatigue performance and influence factors of 3A21,5A06 and 6061 aluminum alloy weld joints are studies based on mesh-insensitive structural stress methods.The results show that the structural stress can represent the effect of the different joint types,material,stress ratio and thickness factors for the fatigue performance of weld joints more profitably than the traditional nominal stress methods.The thinner of join plate thickness,the better fatigue performance of the weld joints is under the same stress ratio.In addition,the lower stress ratio,the better fatigue performance under the same thickness.The fatigue performance of the 5A06 aluminum alloy weld joints is generally better than the one of the 3A21 aluminum alloy.However the thickness is the dominant factors for the influence of their fatigue performance when the plate thickness difference is large.For the same material,stress ratio and plate thickness,the fatigue performance of the butt joints is the best; the T joints the worst,and the cruciform joints between the above two. |
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| Keywords: | aluminum alloy welded joints mesh-insensitive structural stress fatigue performance influence factors |
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