Inversion of Crack Mechanism in Concrete Materials Based on Moment Tensor Theory of Acoustic Emission

doi:10.3969/j.issn.1000-1093.2022.01.020

Abstract

Abstract: The locations, types and orientations of cracks on concrete specimens with bilateral openings during the shear failure process under uniaxial compressive loading are inversed to study the temporal and spatial evolution law of cracks based on the improved acoustic emission localization method and the moment tensor theory. The results of moment tensor analysis show that the growth of tensile cracks is dominant in the tensile damage zone, and the growth of shear cracks is dominant in the shear damage zone, which are consistent with the conditions of actual stress and damage in the specimen. This indicates that the moment tensor theory is a useful method to further study the mechanism of damage evolution in concrete，as it can be used for describing the distribution and migration of tensile stress and shear stress effectively. The results of waveform analysis show that the duration of acoustic emission (AE) signal corresponding to tensile crack is about 800 μs, and the frequency range is 7-500 kHz. The AE signals associated with mixed-mode crack and shear crack have frequency ranges from 7 kHz to 500 kHz and from 7 kHz to 250 kHz, respectively, and have higher duration of about 1 720 μs and 1 880 μs, respectively. The main reason is that the energy released by shear rupture is higher than that by tensile rupture, and the average frequency of shear wave released by shear rupture is lower than that of stress wave released by tensile rupture.

Key words: acousticemission, momenttensortheory, crackevolution, waveformanalysis

CLC Number:

TB301

WANG Zonglian, WANG Huaiwei, REN Huilan, ZHAO Mingyan, LUO Zhiqiang. Inversion of Crack Mechanism in Concrete Materials Based on Moment Tensor Theory of Acoustic Emission[J]. Acta Armamentarii, 2022, 43(1): 181-189.

References

［1］王宗炼, 任会兰, 宁建国. 基于小波变换的混凝土压缩损伤模式识别［J］. 兵工学报, 2017, 38(9): 1745-1753.
WANG Z L, REN H L, NING J G. Identification of damage modes of concrete under compressive loading based on wavelet transform［J］. Acta Armamentarii, 2017, 38(9):1745-1753. (in Chinese)
［2］朱宏平, 徐文胜, 陈小强, 等. 利用声发射信号与速率过程理论对混凝土损伤进行定量评估［J］. 工程力学, 2008, 25(1): 186-191.
ZHU H P, XU W S, CHEN X Q, et al. Quantitative concrete-damage evaluation by acoustic emission information and rate-process theory［J］. Engineering Mechanics, 2008, 25(1):186-191. (in Chinese)
［3］ MEN J J, WANG J C, GUO L Y, et al. Acoustic emission behavior and damage evaluation of recycled aggregate concrete under compression［J］. Structural Control & Health Monitoring, 2020, 27(10):e2612.
［4］ TONELLI D, LUCHETTA M, ROSSI F, et al. Structural health monitoring based on acoustic emissions: validation on a prestressed concrete bridge tested to failure［J］. Sensors, 2020, 20(24):7272.
［5］ HAN Q H, YANG G, XU J. Experimental study on the relationship between acoustic emission energy and fracture energy of crumb rubber concrete［J］. Structural Control & Health Monitoring, 2018, 25(10):e2240.
［6］ YUE J G, KUNNATH S K, XIAO Y. Uniaxial concrete tension damage evolution using acoustic emission monitoring［J］. Construction and Building Materials, 2020, 232:117281.
［7］ SAGAR R V, PRASAD R V, PRASAD B K R, et al. Microcracking and fracture process in cement mortar and concrete: comparative study using acoustic emission technique［J］. Experimental Mechanics, 2013, 53(7):1161-1175.
［8］范向前, 刘决丁, 胡少伟, 等. 中央带裂缝混凝土循环拉伸断裂试验Felicity效应［J］. 复合材料学报, 2019, 36(12): 2968-2974.
FAN X Q, LIU J D, HU S W, et al. Cyclic tensile fracture test of concrete with central crack and Felicity effect ［J］. Acta Materiae Compositae Sinica, 2019, 36(12):2968-2974.(in Chinese)
［9］ CARPINTERI A, CORRADO M, LACIDOGNA G. Three different approaches for damage domain characterization in disordered materials: fractal energy density, b-value statistics, renormalization group theory［J］. Mechanics of Materials, 2012, 53:15-28.
［10］ OHTSO M. Recommendation of RILEM TC 212-ACD: acoustic emission and related NDE techniques for crack detection and damage evaluation in concrete［J］. Materials & Structures, 2010, 43: 1177-1181.
［11］ ZHANG Z H, DENG J H. A new method for determining the crack classification criterion in acoustic emission parameter analysis［J］. International Journal of Rock Mechanics and Mining Sciences, 2020, 130:104323.
［12］ OHNO K, UJI K, UENO A, et al. Fracture process zone in notched concrete beam under three-point bending by acoustic emission［J］. Construction and Building Materials, 2014, 67(Part B): 139-145.
［13］ OHNO K, OHTSU M. Crack classification in concrete based on acoustic emission［J］. Construction and Building Materials, 2010, 24(12):2339-2346.
［14］任会兰, 宁建国, 宋水舟, 等. 基于声发射矩张量分析混凝土破坏的裂纹运动［J］. 力学学报, 2019, 51(6): 1830-1840.
REN H L, NING J G, SONG S Z, et al. Investigation on crack growth in concrete by moment tensor analysis of acoustic emission［J］. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(6):1830-1840. (in Chinese)
［15］ MONDORINGIN M R I A J, OHTSU M. Kinematics on split-tensile test of fiber-reinforced concrete by AE［J］. Journal of Advanced Concrete Technology, 2013, 11(8):196-205.
［16］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.
WANG Z L, REN H L, NING J G. Acoustic emission source loction method based on wavelet transform de-noising［J］. Journal of Vibration and Shock, 2018, 37(4):226-232,248.(in Chinese)
［17］ HAMPTON J, GUTIERREZ M, MATZAR L, et al. Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests［J］. Journal of Rock Mechanics and Geotechnical Engineering, 2018, 10(5):805-817.
［18］ OHTSU M, UDDIN F A K M. Mechanisms of corrosion-induced cracks in concrete at meso- and macro-scales［J］. Journal of Advanced Concrete Technology, 2008, 6(3):419-429.
［19］ ALDAHDOOH M A A, BUNNORI N M. Crack classification in reinforced concrete beams with varying thicknesses by mean of acoustic emission signal features［J］. Construction and Building Materials, 2013, 45:282-288.
［20］ AGGELIS D G. Classification of cracking mode in concrete by acoustic emission parameters［J］. Mechanics Research Communications, 2011, 38(3):153-157.

[1]	LI Zhinong, ZENG Wenjun, WEN Qinsong, SHEN Gongtian, SHEN Yongna. Magnetoacoustic Emission Characteristics of Q235 Steel under Static Load Tension and Low Cycle Fatigue [J]. Acta Armamentarii, 2021, 42(1): 185-191.
[2]	WANG Zong-lian, REN Hui-lan, NING Jian-guo. Identification of Damage Modes of Concrete under Compressive Loading Based on Wavelet Transform [J]. Acta Armamentarii, 2017, 38(9): 1745-1753.