基于超声导波的频散方程及位移场表达式,对单向碳纤维/环氧复合板中传播的超声导波的幅度谱进行了数值研究,得到了能全面、直观反映复合材料板材疲劳损伤程度的超声导波幅度谱的灰度图.数值分析表明,当复合材料板材承受拉伸或弯曲载荷时,其等效杨氏模量或等效剪切模量的变化率,与超声导波幅度谱的灰度平均值之间存在单调的对应关系.采用超声导波的幅度谱方法可望能有效定征复合材料板材的初期疲劳损伤.
Based on the dispersion equation and the displacement field expression of ultrasonic guided waves,ultrasonic guided wave amplitude spectra have been studied numerically for a unidirectional carbon fiber sheet.The gray images of ultrasonic guided wave amplitude spectra that can straightforwardly characterize the degree of fatigue in composite sheets are obtained.The numerical results show that,with the tension-tension or bending fatigue loading,there is a monotonic relationship between the average gray value of gray images of ultrasonic guided wave amplitude spectra and the change rate of equivalent Young's modulus or equivalent shear modulus.It is concluded that the ultrasonic guided wave amplitude spectra may be used to effectively characterize the early stages of fatigue damage in composite sheets.
参考文献
| [1] | Rose J L.A baseline and vision of ultrasonic guided wave inspection potential[J].Journal of Pressure Vessel Technology,2002,124(3):273-282. |
| [2] | Yang W,Kundu T.Guided waves in multilayered anisotropic plates for internal defect detection[J].ASCE Journal of Engineering Mechanics,1998,124(3):311-318. |
| [3] | Eisenhardt C,Jacobs L J,Qu J M.Experimental Lamb wave spectra of cracked plates[C]∥AIP Conference Proceedings.New York:American Institute of Physics,2000,509:343-350. |
| [4] | Pei J F,Deng M X.Assessment of fatigue damage in solid plates using ultrasonic Lamb wave spectra[C]∥IEEE Ultrasonics Symposium Proceedings.New Jersey:IEEE Ultrasonics,Ferroelectrics & Frequency Control Society,2008:1869-1872. |
| [5] | Han J,Kim C G,Kim J Y.The propagation of Lamb waves in a laminated composite plate with a variable stepped thickness[J].Composite Structures,2006,76(4):388-396. |
| [6] | Velichko A,Wilcox P D.Modeling the excitation of guided waves in generally anisotropic multilayered media[J].Journal of the Acoustical Society of America,2007,121(1):60-69. |
| [7] | Brassier P,Peres P,Hosten B,et al.Health monitoring of composite structures using ultrasonic guided waves[C]∥ Proceedings of NDT for Safety.Prague:Brno University of Technology,2007:21-30. |
| [8] | Lissenden C J,Yan F,Hauck E T,et al.Internal damage detection in a laminated composite plate using ultrasonic guided waves[C]∥AIP Conference Proceedings.New York,American Institute of Physics,2007,894:1029-1035. |
| [9] | Jung Y C,Naw B,Kundu T.Damage detection in concrete using Lamb waves[C]∥Proceedings of the SPIE.Washington:Society of Photo-Optical Instrumentation Engineers,2000,3995:448-458. |
| [10] | Jung Y C,Kundu T.Ultrasonic response to material fatigue[C]∥Proceedings of the SPIE.Washington:Society of Photo-Optical Instrumentation Engineers,2001,4335:180-187. |
| [11] | 沈观林,胡更开.复合材料力学[M].北京:清华大学出版社,2006:183-186.Shen Guanlin,Hu Gengkai.Mechanics of Composite Materials[M].Beijing:Tsinghua University Press,2006:183-186. |
| [12] | 杜双明,乔生儒,纪岗昌,等.3D-C/SiC复合材料拉-拉疲劳模量和电阻的变化[J].宇航材料工艺,2002,32(5):38-41.Du Shuangming,Qiao Shengru,Ji Gangchang,et al.Variation of Young's modulus and electric resistance of 3D-C/SiC composite during tension-tension fatigue at room temperature[J].Aerospace Materials & Technology,2002,32(5):38-41. |
| [13] | 施晓霞,李泽宏,顾伯洪.单向复合材料弯曲疲劳性能[J].纺织学报,2002,23(5):44-45.Shi Xiaoxia,Li Zehong,Gu Bohong.Bending fatigue properties of composites[J].Journal of Weave,2002,23(5):44-45. |
| [14] | 裴俊峰,邓明晰.复合材料板材弹性参数变化对超声兰姆波的影响[J].声学技术,2008,27(5):150-151.Pei Junfeng,Deng Mingxi.Influence of changes in elastic parameters of a composite plate on ultrasonic Lamb waves[J].Technical Acoustics,2008,27(5):150-151. |
| [15] | 罗斯J L.固体中的超声波[M].北京:科学出版社,2004:213-220.Rose J L.Ultrasonic waves in solids[M].Beijing:Science Press,2004:213-220. |
| [16] | Auld B A.Acoustic field and waves in solids (I)[M].New York:Wiley,1973:191-264. |
| [17] | 凯德罗伯特 M.固体的变形与断裂[M].北京:机械工业出版社,1988:294-320.Caddell Robert M.Solid deformation and fracture[M].Beijing:China Machine Press,1988:294-320. |
| [18] | 邓明晰.各向异性固体板中的非线性超声导波[J].声学学报,2008,33(3):252-261.Deng Mingxi.Nonlinear ultrasonic guided waves in an anisotropic solid plate[J].Acta Acoustics,2008,33(3):252-261. |
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