EXPERIMENTAL RESEARCH ON ACOUSTIC EMISSION SOURCE LOCALIZATION FOR CARBON FIBER COMPOSITE

Abstract

Abstract: Acoustic Emission (AE) testing technology can realize the dynamic monitoring of materials, and it also has certain limitations. Because the AE signal is more complicated in the anisotropic carbon fiber composite material, the AE source damage location has a large deviation. A time reversal focusing and enhancing algorithm is used for the AE positioning requirements of carbon fiber composite plate. Firstly, according to the basic theory of time reversal, the signal enhancement processing equation is derived, and the focus time of the AE source can be calculated, furthermore enhancing the focus amplitude of the AE source signal field and the signal to noise ratio (SNR) is improved. Then the wave image is reconstructed in the detection area, and the AE source is accurately positioned by the focus signal. Finally, the method has been verified through experiment, and the results show that the localization algorithm can locate the AE source of complex anisotropic materials, and the positioning accuracy is greatly improved compared with the conventional instrument positioning method.

Key words: acoustic emission (AE) testing, carbon fiber composite, source location, focusing time, signal noise ratio (SNR)

CLC Number:

TB332

QI Tian-tian, CHEN Yao, HE Cai-hou, LI Qiu-feng. EXPERIMENTAL RESEARCH ON ACOUSTIC EMISSION SOURCE LOCALIZATION FOR CARBON FIBER COMPOSITE[J]. Composites Science and Engineering, 2020, 0(6): 5-9.

References

[1] 郑洁, 姚磊江, 程起有, 等. 复合材料损伤的声发射试验研究[J]. 机械科学与技术, 2010, 29(11): 1478-1481.
[2] 龙小江, 李秋锋, 何才厚, 等. 不同拉伸速率下钢材损伤的声发射监测评价[J]. 振动与冲击, 2017, 36(7): 219-225.
[3] 黄展鸿, 黄春芳, 张鉴炜, 等. 声发射技术在纤维增强复合材料损伤检测和破坏过程分析中的应用研究进展[J]. 材料导报, 2018, 32(7): 1122-1128.
[4] Gutkin R, Green C J, Vangrattanachai S, et al. On acoustic emission for failure investigation in CFRP: Pattern recognition and peak frequency analyses[J]. Mechanical Systems and Signal Processing, 2011, 25(4): 1393-1407.
[5] 袁梅, 商富凯, 董韶鹏. 基于经验小波变换的复合材料板声发射源定位[J]. 北京航空航天大学学报, 2018, 44(7): 1395-1401.
[6] 商雅静, 尹寒飞, 周伟, 等. 碳纤维三维四向编织复合材料拉伸变形与损伤破坏行为[J]. 玻璃钢/复合材料, 2018(12): 41-46.
[7] Jiang Y, Yu M J. Influence of birefringence fibre length on demodulation sensitivity based on a fibre loop mirror sensor[J]. IET Optoelectronics, 2018,12 (5): 254-257.
[8] 李昕, 罗更生, 龙盛蓉, 等. 钢板声发射时间反转聚焦增强定位方法[J]. 仪器仪表学报, 2016, 37(8): 1792-1799.
[9] Ciampa F, Meo M. Acoustic emission localization in complex dissipa-tive anisotropic structures using a one-channel reciprocal time reversal method[J]. The Journal of the Acoustical Society of America, 2011, 130(1): 168.
[10] 马慧颖, 曾向阳. 声学时间反转定位方法及其应用[J]. 电声技术, 2015, 39(7): 30-34.
[11] 张海燕, 孙修立, 曹亚萍, 等. 基于时间反转理论的聚焦Lamb波结构损伤成像[J]. 物理学报, 2010, 59(10): 7111-7119.
[12] 冯勇明, 周丽. 基于Lamb波时间反转的复合材料结构损伤监测[J]. 中国机械工程, 2011, 22(20): 2476-2480.
[13] 邱雷, 袁慎芳, 张逍越, 等. 基于Shannon复数小波的复合材料结构时间反转聚焦多损伤成像方法[J]. 复合材料学报, 2010, 27(2): 101-107.
[14] Pejryd L, Beno T, Carmignato S. Computed tomography as a tool for examining surface integrity in drilled holes in CFRP composites[J]. Procedia CIRP, 2014, 13: 43-48.
[15] 邵翔,张士晶,欧阳未, 等. 飞机蜂窝复合材料板压缩过程的声发射定位研究[J]. 失效分析与预防, 2013, 8(3): 151-155.
[16] 刘增华, 董拓灿, 彭秋玲, 等. 碳纤维复合材料板的声发射源定位[J]. 无损检测, 2016, 38(10): 48-52.
[17] 叶荣耀, 王强, 范昕炜, 等. 基于时间反转法的单传感器复合材料声发射源定位研究[J]. 武汉理工大学学报, 2014, 36(12): 22-26.
[18] Aljets D, Chong A, Wilcox S, et al. Acoustic emission source location on large plate-like structures using a local triangular sensor array[J]. Mechanical Systems & Signal Processing, 2012, 30(7): 91-102.
[19] 王宗炼, 任会兰, 宁建国. 基于小波变换降噪的声发射源定位方法[J]. 振动与冲击, 2018, 37(4): 226-232, 248.
[20] 李秋锋, 陈建娟, 何才厚, 等. 基于时间反转聚焦的声发射源定位算法[J]. 传感技术学报, 2015, 28(11): 1659-1663.
[21] Jiang Y, Liang D K, Lu J Y. Voltage demodulation and vibration monitoring based on a polarization maintaining fiber loop mirror[J].Journal of Intelligent Material Systems and Structures, 2017, 28(13): 1832-1838.
[22] 蔡建, 石立华, 袁慎芳. 基于虚拟时间反转的高分辨率复合材料板结构损伤成像[J]. 复合材料学报, 2012, 29(1):183-189.