连接件疲劳寿命分析的改进SSF法

王克峰; 姚卫星

连接件疲劳寿命分析的改进SSF法

王克峰¹,
姚卫星²

1.
陆军航空兵学院机械工程系, 北京 101123;
2.
南京航空航天大学飞行器先进设计技术国防重点学科实验室, 南京 210016

详细信息

作者简介:
王克峰(1985-)，硕士，研究方向为结构抗疲劳设计，kefengwang-pla@qq.com;姚卫星(联系人)，教授，博士生导师，wxyao@nuaa.edu.cn

王克峰(1985-)，硕士，研究方向为结构抗疲劳设计，kefengwang-pla@qq.com;姚卫星(联系人)，教授，博士生导师，wxyao@nuaa.edu.cn

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出版历程
- 收稿日期: 2010-10-05
- 刊出日期: 2015-06-10

A Modified Stress Severity Factor Approach for Fatigue Lifetime Prediction of Joints

Wang Ke-feng¹,
Yao Wei-xing²

1.
Department of Mechanical Engineering, Army Aviation Institute of PLA, Beijing 101123;
2.
Key Laboratory of Fundamental Science for National Defense-advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016

摘要

摘要: 为了提高连接件疲劳寿命分析的预测精度,对应力严重系数(SSF)法中存在的问题进行了研究和改进。依据连接件疲劳破坏现象,将连接件的疲劳破坏危险点定义在垂直于总体载荷的孔边。对连接件进行了接触有限元分析,考虑了三维应力集中与二维应力集中之间的折算关系,获得了危险点处的挤压应力集中系数和挤压分布系数,并由此获得了改进的SSF法。应用改进的SSF法完成了两个连接件算例,结果表明改进后疲劳寿命的预测精度有所提高。
- 连接件 /
- 疲劳寿命 /
- 应力严重系数 /
- 接触算法 /
- 三维应力集中
Abstract: In the present work,a few problems existing in the stress severity factor(SSF) approach used for the fatigue life analysis of joints were studied and an improvement of the approach was accomplished.Based on the observation of the fatigue damage failures,the point at the edge of the hole which is vertical to the overall loading direction was defined to be the fatigue damage dangerous point.2D and 3D contact finite element analyses of the joints were carried out.Taking into consideration of converting relation between the three-dimension stress concentration and the two-dimension stress concentration,the extrusion stress concentration factor and extrusion distribution factor were gotten,and thus the modified SSF approach was obtained.Two examples of the fatigue life analysis of joints were accomplished using the modified SSF approach and the results demonstrated that this modified SSF approach gives a more accurate prediction for the fatigue life.
- joints /
- fatigue life /
- stress severity factor /
- contact algorithm /
- three-dimension stress concentration

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参考文献(18)

[1]	姚卫星.结构疲劳寿命分析[M].北京:国防工业出版社,2003:103～116
[2]	么森.某型飞机前起后接头连接区疲劳寿命分析[J].科学技术与工程,2007,20(7):5446～5448
[3]	何宇廷.飞机连接加强件疲劳特性分析[J].机械科学与技术,2001,20(2):231～233
[4]	史思佃.应力严重系数法在直升机主桨叶寿命评估中的应用[J].直升机技术,2003,(2):12～15
[5]	张成成,姚卫星,叶彬.连接件疲劳寿命分析的等效SSF法[J].航空学报,2009,30(2):271～275
[6]	西田正孝,李安定等译.应力集中[M].北京:机械工业出版社,1986:222～226
[7]	Ciavarella M,Decuzzi P.The state of stress induced by the plane frictionless cylindrical contact I the case of elastic similarity[J].International Journal of Solids and Structures,2001,38(26-27):4507～4523
[8]	Iyer K.Solutions for contact in pinned connections[J].Interna-tional Journal of Solids and Structures,2001,38(50-51):9133～9148
[9]	Yavari V.On the stress distribution around the hole in mechani-cally fastened joints[J].Mechanics Research Communica-tions,2008,36(3):373～380
[10]	彼德森R E,杨乐民,叶道益译.应力集中系数[M].北京:国防工业出版社,1988:92～93
[11]	Sundarraj N,Dattagurut B,Ramamurthyz T S.Analysis of a double shear lap joint with interference fit pin[J].Computers and Structures,1995,55(2):357～363
[12]	Urban M R.Analysis of the fatigue life of riveted sheet metal hel-icopter airframe joints[J].International Journal of Fatigue,2003,25(9-11):1013～1026
[13]	McCarthy M A,McCarthy C T,Lawlor V P,et al.Three-dimen-sional finite element analysis of single-bolt,single-lap composite bolted joints:part I-model development and validation[J].Composite Structures,2005,71(2):140～158
[14]	McCarthy C T,McCarthy M A.Three-dimensional finite element analysis of single-bolt,single-lap composite bolted joints:Part II-effects of bolt-hole clearance[J].Composite Structures,2005,71(2):159～175
[15]	科诺瓦洛夫лB,朱燕贞译.剪切螺栓或铆钉连接件的被连接元件孔区内的应力集中[J].紧固件技术,2002,(1):22～26
[16]	佘崇民,郭万林,张斌等.有限厚中心圆孔板的最大三维应力集中[J].机械科学与技术,2006,25(4):438～441
[17]	《飞机设计手册》总编委会.飞机设计手册:标准和标准件(上)[S].北京:航空工业出版社,2001:412～415
[18]	王克峰.连接件疲劳寿命分析的改进SSF法[D].南京:南京航空航天大学,2010