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材料工程  2013 

基于声发射和双谱分析的铝合金损伤原位监测研究

DOI: 10.3969/j.issn.1001-4381.2013.05.014, PP. 67-72

Keywords: 铝合金,声发射,数字图像,裂纹萌生,双谱

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Abstract:

以列车车体材料7N01铝合金为研究对象,基于声发射和数字图像技术对7N01铝合金三点弯曲损伤过程进行了监测,采用传统的声发射参数与双谱法分析了7N01铝合金裂纹萌生及失稳扩展的声发射特征。结果表明声发射能量和质心频率可有效预报7N01铝合金微裂纹的萌生。声发射信号的双谱等高线图显示两个频率成分之间的耦合关系,使得识别7N01铝合金三点弯曲过程中的不同阶段变得相对容易。7N01铝合金试样缺口尖端的损伤演变过程的数字图像监测结果,验证了声发射能量和质心频率对裂纹萌生的预测。实验结果显示声发射监测技术为裂纹演变行为的预测提供了依据。

References

[1]  BELLENGER F, MAZILLE H, IDRISSI H. Use of acoustic emission technique for the early detection of aluminum alloys exfoliation corrosion[J]. NDT & E International, 2002, 35(6): 385-392.
[2]  KORDATOS E Z, AGGELIS D G, MATIKAS T E. Monitoring mechanical damage in structural materials using complimentary NDE techniques based on thermography and acoustic emission[J]. Composites: Part B, 2012, 43(6):2676-2686.
[3]  MUKHOPADHYAY C K, JAYAKUMAR T, BALDEV R, et al. The influence of notch on the acoustic emission generated during tensile testing of nuclear grade AISI type 304 stainless steel[J]. Materials Science and Engineering:A, 2000, 276(1-2): 83-90.
[4]  ROY H, PARIDA N, SIVAPRASAD S, et al. Acoustic emissions during fracture toughness tests of steels exhibiting varying ductility[J]. Materials Science and Engineering: A, 2008, 486(1-2):562-571.
[5]  MUKHOPADHYAY C K, JAYAKUMAR T, RAJ B, et al. Acoustic emission-stress intensity factor relations for tensile deformation of notched specimens of AISI type 304 stainless steel[J]. Materials Science and Engineering: A, 2000, 293(1-2):137-145.
[6]  CHOI N S, TAKAHASHI K, HOSHINO K. Characteristics of acoustic emission during the damage process in notched short-fibre-reinforced thermoplastics[J]. NDT & E International, 1992, 25(6):271-278.
[7]  BOIRCHAK M, FARROW I R, BOND I P, et al. Acoustic emission energy as a fatigue damage parameter for CFRP composites[J]. International Journal of Fatigue, 2007, 29(3): 457-470.
[8]  GB/T18182—2000, 金属压力容器声发射检测及结果评价方法[S].
[9]  耿荣生, 沈功田, 刘时风. 基于波形分析的声发射信号处理技术[J]. 无损检测, 2002, 24(6):257-261. GENG Rong-sheng, SHEN Gong-tian, LIU Shi-feng. Acoustic emission signal processing technique based on waveform analysis [J]. Nondestructive Testing, 2002, 24(6):257-261.
[10]  李光海, 刘时风. 基于小波分析的声发射源定位技术[J]. 机械工程学报, 2004, 40(7):136-140. LI Guang-hai, LIU Shi-feng. Technique of acoustic emission source locating based on wavelet analysis[J]. Chinese Journal of Mechanical Engineering, 2004, 40(7): 136-140.
[11]  陈仲生. 基于Matlab 7.0 的统计信息处理[M]. 长沙:湖南科学技术出版社, 2005. 195-207.
[12]  PIOTRKOWSKI R, ENRIQUE C, ANTOLINO G. Wavelet power, entropy and bispectrum applied to AE signals for damage identification and evaluation of corroded galvanized steel[J]. Mechanical Systems and Signal Processing, 2009, 23(2): 432-445.
[13]  杨明纬. 声发射检测[M]. 北京: 机械工业出版社, 2005. 1-6.
[14]  YANG L, ZHOU Y C, MAO W G, et al. Real-time acoustic emission testing based on wavelet transform for the failure process of thermal barrier coatings[J]. Applied Physics Letters, 2008, 93(23): 231906-231911.

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