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- 2016
基于振动疲劳试验的复合材料螺栓连接预紧力松弛特性
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Abstract:
在强迫弯曲振动试验的基础上,建立了基于模态参数(共振频率和阻尼比)表征螺栓连接结构动态性能的分析方法和试验测试手段;通过施加不同初始预紧力和激振频率,探究碳纤维/环氧复合材料螺栓连接预紧力松弛的时变行为及其影响因素。结果表明:在10h振动疲劳过程中,螺栓初始预紧力越小,激振频率越大,连接件预紧力松弛程度越大;振动疲劳损伤会导致连接结构刚度衰退、阻尼增加;复合材料螺栓连接松弛受到材料黏弹性以及界面摩擦的共同影响,其中约50%的松弛是由复合材料黏弹性效应引起的。 The time-dependent behavior and the affecting factors of preload relaxation in carbon/epoxy composite bolted joint have been studied, through a forced bending vibration test included various initial preloads and excitation frequencies. Analysis method and test method, based on modal parameters (resonance frequency and damping ratio), were utilized to characterize the dynamic property of bolted joints. It is observed that the loss degree of preload will increase with decreasing initial preload, and it will increase with the exciting frequency increasing, over a period of 10 h vibration fatigue process. Vibration fatigue damages would result in stiffness decay and damping increase in structural joints; the relaxation in composite bolted joints can be attributed to the conjunct mechanisms between viscoelastic behavior of materials and interface friction of which about 50% of relaxation is due to viscoelastic effect of composites. 中央高校基本科研业务费专项资金(0220219105)
| [1] | XIAO Y, ISHIKAWA T. Bearing strength and failure behavior of bolted composite joints (part I:Experimental investigation)[J]. Composites Science and Technology, 2005, 65(7):1022-1031. |
| [2] | XIAO Y, ISHIKAWA T. Bearing strength and failure behavior of bolted composite joints (part II:Modeling and simulation)[J]. Composites Science and Technology, 2005, 65(7):1032-1043. |
| [3] | BICKFORD J. An introduction to the design and behavior of bolted joints, revised and expanded[M]. Los Angeles:CRC Press, 1995:24-31. |
| [4] | ZHANG Z, XIAO Y, HU J F. Viscoelastic relaxation in bolted composite joints (part II:Vibration damping response)[C]//9th Asian-Australasian Conference on Composite Materials (ACCM-9). Su Zhou:Nanjing University of Aeronautics and Astronautics, 2014:344-350. |
| [5] | 裴瑞光, 张振, 肖毅, 等. 复合材料紧固件连接预紧力松弛行为[C]//中国力学大会-2013论文摘要集. 西安:西安交通大学, 2013:65. PEI R G, ZHANG Z, XIAO Y, et al. Preload relaxation behavior in fastened composite joints[C]//CCSTAM-2013 Abstract Collection. Xi'an:Xi'an Jiaotong University, 2013:65 (in Chinese). |
| [6] | ROUSSEAU C Q, IARVE E V. Long-term durability of polymeric matrix composites[M]. Berlin:Springer Science & Business Media, 2011:16-20. |
| [7] | FINDLEY W N,DAVIS F A. Creep and relation of nonlinear viscoelastic materials[M]. New York:Dover Publications, 1989:190-212. |
| [8] | AHMADIAN H, JALALI H. Identification of bolted lap joints parameters in assembled structures[J]. Mechanical Systems and Signal Processing, 2007, 21(2):1041-1050. |
| [9] | 郝秉磊, 殷小玮, 刘小瀛, 等. C/SiC陶瓷基复合材料螺栓连接件的振动响应特性及防松性能[J]. 复合材料学报, 2014, 31(3):653-660. HAO B L, YIN X W, LIU X Y, et al. Vibration response characteristics and looseness-proof performances of C/SiC ceramic matrix composite bolted fastenings[J]. Acta Materiae Compositae Sinca, 2014, 31(3):653-660 (in Chinese). |
| [10] | SCHULTZ A B, TSAI S W. Dynamic moduli and damping ratios in fiber-reinforced composites[J]. Journal of Composite Materials, 1968, 2(3):368-379. |
| [11] | SCHULTZ A B, WARWICK D N. Vibration Response:A non-destructive test for fatigue crack damage in filament-reinforced composites[J]. Journal of Composite Materials, 1971, 5(3):394-404. |
| [12] | American Society for Testing and Materials International. ASTM E756-05 Standard test method for measuring vibration-damping properties of materials[S]. West Conshohocken:ASTM International, 2010. |
| [13] | GROPER M. Microslip and macroslip in bolted joints[J]. Experimental Mechanics, 1985, 25(2):171-174. |
| [14] | THOPPUL S D, FINEGAN J, GIBSON R F. Mechanics of mechanically fastened joints in polymer-matrix composite structures-A review[J]. Composites Science and Technology, 2009, 69(3):301-329. |
| [15] | SHIVAKUMAR K N, CREWS JR J H. Bolt clampup relaxation in a graphite/epoxy laminate[J]. Long Term Behavior of Composites, ASTM STP, 1983, 813:5-22. |
| [16] | THOPPUL S D, GIBSON R F, IBRAHIM R A. Phenomenological modeling and numerical simulation of relaxation in bolted composite joints[J]. Journal of Composite Materials, 2008, 42(17):1709-1729. |
| [17] | IBRAHIM R A, PETTIT C L. Uncertainties and dynamic problems of bolted joints and other fasteners[J]. Journal of Sound and Vibration, 2005, 279(3):857-936. |
| [18] | JIANG Y, ZHANG M, Lee C H. A study of early stage self-loosening of bolted joints[J]. Journal of Mechanical Design, 2003, 125(3):518-526. |
| [19] | JIANG Y, ZHANG M, PARK T W, et al. An experimental study of self-loosening of bolted joints[J]. Journal of Mechanical Design, 2004, 126(5):925-931. |
| [20] | JIANG X, ZHU Y, HONG J, et al. Investigation into the loosening mechanism of bolt in curvic coupling subjected to transverse loading[J]. Engineering Failure Analysis, 2013, 32:360-373. |
| [21] | 姚起杭, 姚军. 工程结构的振动疲劳问题[J]. 应用力学学报, 2006, 23(1):12-15. YAO Q H, YAO J. Vibration fatigue in engineering structures[J]. Chinese Journal of Applied Mechanics, 2006, 23(1):12-15 (in Chinese). |
| [22] | GIANNOCCARO N I, MESSINA A, NOBILE R, et al. Fatigue damage evaluation of notched specimens through resonance and anti-resonance data[J]. Engineering Failure Analysis, 2006, 13(3):340-352. |
| [23] | SHEN H J, YAO W X, WU Y T. Synergistic damage mechanic model for stiffness properties of early fatigue damage in composite laminates[J]. Procedia Engineering, 2014, 74:199-209. |
| [24] | 谢鸣九. 复合材料连接[M]. 上海:上海交通大学出版社, 2011:3-10. XIE M J. Joints for composites materials[M]. Shanghai:Shanghai Jiao Tong University Press, 2011:3-10 (in Chinese). |
| [25] | BHATTACHARYA A, SEN A, DAS S. An investigation on the anti-loosening characteristics of threaded fasteners under vibratory conditions[J]. Mechanism and Machine Theory, 2010, 45(8):1215-1225. |
| [26] | 李俊, 矫桂琼, 王刚, 等. 室温下C/SiC复合材料螺纹紧固件的拧紧特性[J]. 复合材料学报, 2012, 29(5):164-170. LI J, JIAO G Q, WANG G, et al. Tightening characteristic of C/SiC composite threaded fasteners at room temperature[J]. Acta Materiae Compositae Sinca, 2012, 29(5):164-170 (in Chinese). |
| [27] | DOEBLING S W, FARRAR C R, PRIME M B. A summary review of vibration-based damage identification methods[J]. Shock and Vibration Digest, 1998, 30(2):91-105. |
