航空铆钉的动态力学性能测试
收稿日期: 2013-12-05
修回日期: 2013-12-26
网络出版日期: 2014-01-03
基金资助
国家自然科学基金(11102166,10932008);高等学校学科创新引智计划(B07050);西北工业大学基础研究基金 (JC201201)
Dynamic Mechanical Test of Aeronautic Rivets
Received date: 2013-12-05
Revised date: 2013-12-26
Online published: 2014-01-03
Supported by
National Natural Science Foundation of China (11102166, 10932008);"111" Project of China (B07050);Basic Research Foundation of NPU (JC201201)
在飞机鸟撞的课题研究中,数值模拟占据着日益重要的地位,而数值模拟的精度在很大程度上依赖于铆钉力学参数的准确性,但是目前航空铆钉的动态力学性能参数还很匮乏.本文测定了航空铝合金铆钉在不同加载速度下的剪切和拉伸力学性能.设计了基于分离式Hopkinson拉杆系统的铆钉动态性能测试装置,并利用此装置对7种不同型号的航空铆钉进行了动态剪切和拉伸试验,得到了每种型号铆钉的动态力学性能.利用电子万能试验机对7种铆钉进行了两种应变率下的准静态剪切和拉伸试验,并且和动态试验结果进行对比.讨论了加载速度、加载形式、铆钉直径以及铆钉形式对铆钉力学性能的影响,并利用扫描电子显微镜(SEM)观察了铆钉剪切破坏以及拉伸破坏的断口形貌,分析了其破坏形式.本文的研究结果对于航空铝合金铆钉在工程中的应用、尤其是在抗冲击领域的应用具有指导意义.
杨沛 , 郭亚洲 , 李玉龙 . 航空铆钉的动态力学性能测试[J]. 航空学报, 2014 , 35(11) : 3012 -3024 . DOI: 10.7527/S1000-6893.2013.0506
Numerical simulation is playing an important role in the research of bird strikes, the accuracy of which depends to a large extent on the dynamic mechanical properties of rivets. Despite the importance of the dynamic mechanical properties of rivets, only limited amounts of published data are available on this issue. In this paper the shear and tension mechanical properties of aluminum alloy rivets under different loading velocities are determined. To explore the dynamic shear and tension mechanical properties of rivets, shear and uniaxial tension tests are carried out by using the split Hopkinson tension bar technique. An experimental setup for testing dynamic properties of rivets is designed based on the split Hopkinson tension bar system, and dynamic shear and tension tests of seven different types of aeronautic rivets are carried out using this system. Quasi-static shear and tension tests under two strain rates are carried out by using a universal electronic testing machine, and then the results are compared with those of the dynamic tests. Further discussions reveal the effect of loading velocity, loading modes, rivet radius and rivet modes on the mechanical properties of rivets. To analyze the failure modes, a detailed observation of fracture surfaces is performed using a scanning electron microscope (SEM). The results of this study can provide some guidance for the application of aerospace aluminum alloy rivets in engineering, especially with respect to impact.
Key words: split Hopkinson tension bar; universal electronic testing machine; rivet; shear; tension; SEM
[1] Wang Q. The numerical analysis of stress and failure mode of connecting head of C/SiC composite material[D]. Xi'an: Northwestern Polytechnical University, 2005. (in Chinese) 汪清. C/SiC复合材料连接接头应力与破坏形式数值分析[D]. 西安: 西北工业大学,2005.
[2] Wu J G. The research of theory and application of crack propagation and damage[D]. Beijing: Beihang University, 2009. (in Chinese) 吴建国. 裂纹扩展与损伤演化理论与应用研究[D]. 北京: 北京航空航天大学, 2009.
[3] Porcaro R, Hanssen A G, Aalberg A, et al. Joining of aluminium using self-piercing riveting: testing, modelling and analysis[J]. International Journal of Crashworthiness, 2004, 9(2): 141-154.
[4] Porcaro R, Hanssen A G, Langseth M, et al. The behaviour of a self-piercing riveted connection under quasi-static loading conditions[J]. International Journal of Solids and Structures, 2006, 43(17): 5110-5131.
[5] Porcaro R, Hanssen A G, Langseth M, et al. An experimental investigation on the behaviour of self-piercing riveted connections in aluminium alloy AA6060[J]. International Journal of Crashworthiness, 2006, 11(5): 397-417.
[6] Lennon R, Pedreschi R, Sinha B P. Comparative study of some mechanical connections in cold formed steel[J]. Construction and Building Materials, 1999, 13(3): 109-116.
[7] Dilorenzo G, Landolfo R. Shear experimental response of new connecting systems for cold-formed structures[J]. Journal of Constructional Steel Research, 2004, 60(3-5): 561-579.
[8] Sun X, Stephens E V, Khaleel M A. Fatigue behaviours of self-piercing rivets joining similar and dissimilar sheet metals[J]. International Journal of Fatigue, 2007, 29(2): 370-386.
[9] Li B, Fatemi A. An experimental investigation of deformation and fatigue behaviour of coach peel riveted joints[J]. International Journal of Fatigue, 2006, 28(1): 9-18.
[10] Fu M, Mallick P K. Fatigue of self-piercing riveted joints in aluminium alloy 6111[J]. International Journal of Fatigue, 2003, 25(3): 183-189.
[11] Han L, Chrysanthou A, O'Sullivan J M. Fretting behaviour of self-piercing riveted aluminium alloy joints under different interfacial conditions[J]. Materials and Design, 2006, 27(3): 200-208.
[12] Lee M H, Kim H Y, Oh S I. Crushing test of double hat-shaped members of dissimilar materials with adhe sively bonded and self-piercing riveted joining methods[J]. Thin-Walled Structures, 2006, 44(4): 381-386.
[13] Guo W G, Li Y L, Suo T. Brief tutorial of stress wave[M]. Xi'an: Northwestern Polytechnical University Press, 2007: 120-126. (in Chinese) 郭伟国, 李玉龙, 索涛. 应力波简明教程[M]. 西安: 西北工业大学出版社, 2007: 120-126.
[14] Wang L,Li Y L, Suo T, et al. Mechanical behavior of commonly used aeronautical aluminum alloys under dynamic tension[J]. Journal of Aeronautical Materials, 2013, 33(4): 71-77. (in Chinese) 王雷, 李玉龙, 索涛, 等. 航空常用铝合金动态拉伸力学性能探究[J]. 航空材料学报, 2013, 33(4): 71-77.
[15] Bayraktar E, Kaplan D, Buirette C, et al. Application of impact tensile testing to welded thin sheet[J]. Journal of Materials Processing Technology, 2004, 145(1): 27-39.
[16] Birch R S, Alves M. Dynamic failure of structural joint systems[J]. Thin-Walled Structures, 2000, 36(2): 137-154.
[17] Li Q M, Mines R A W, Birch R S. Static and dynamic behaviour of composite riveted joints in tension[J]. International Journal of Mechanical Sciences, 2000, 43(2001): 1591-1610.
[18] Porcaro R, Langseth M, Hanssen A G, et al. Crashworthiness of self-piercing riveted connections[J]. International Journal of Impact Engineering, 2007, 35(2008): 1251-1266.
[19] Aviation Manufacturing Engineering Handbook Total Editorial Board. Aviation manufacturing engineering handbook(aircraft assembly)[M]. 2nd ed. Beijing: Aircraft Industry Press, 1993: 227-248. (in Chinese) 航空制造工程手册总编委会. 航空制造工程手册(飞机装配)[M]. 2版. 北京: 航空工业出版社, 1993: 227-248.
[20] Tian J J, Li Y L, Hu G L, et al. Tenslie behavior and fractography of two kinds of ultra-high strength steels[J]. Ordnance Material Science and Engineering, 2009, 32(4): 31-35. (in Chinese) 田晶晶, 李玉龙, 胡广立, 等.两种超高强度钢的拉伸力学性能研究及断口分析[J]. 兵器材料科学与工程, 2009, 32(4): 31-35.
[21] MatWeb. Aluminum 2117-T4. [2013-11-05]. http://www.matweb.com.
[22] Cui Y X, Wang C L. The analysis of metal fracture surface[M]. Harbin: Harbin Institute of Technology Press, 1998: 1-45. (in Chinese) 崔约贤, 王长利. 金属断口分析[M]. 哈尔滨: 哈尔滨工业大学出版社, 1998: 1-45.
[23] Su X J, Chen Y. The analysis of metal fracture surface and atlas[M]. Beijing: Science Press, 1991:27-55. (in Chinese) 苏锡九, 陈英. 金属材料断口分析及图谱[M]. 北京: 科学出版社, 1991: 27-55.
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