基于声发射矩张量理论的混凝土裂纹机制反演

doi:10.3969/j.issn.1000-1093.2022.01.020

兵工学报 ›› 2022, Vol. 43 ›› Issue (1): 181-189.doi: 10.3969/j.issn.1000-1093.2022.01.020

基于声发射矩张量理论的混凝土裂纹机制反演

王宗炼^1，2，王怀伟¹，任会兰³，赵明岩¹，罗志强¹

(1.中国计量大学浙江省智能制造质量大数据溯源与应用重点实验室, 浙江杭州 310018; 2.南开大学电子信息与光学工程学院, 天津 300350；3.北京理工大学爆炸科学与技术国家重点实验室, 北京 100081)

上线日期:2022-03-01
通讯作者: 赵明岩(1974—),男，副教授，硕士生导师 E-mail:zhaomingyan168@126.com
作者简介:王宗炼(1990—), 男, 讲师，硕士生导师。E-mail: zonglianw@163.com
基金资助:
浙江省基础公益研究计划项目(LGN22E050003)；国家自然科学基金项目(12072028)；国家重点研发计划项目(2018YFF0214702)

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

WANG Zonglian^1,2， WANG Huaiwei¹， REN Huilan³， ZHAO Mingyan¹， LUO Zhiqiang¹

(1.Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Analysis of Zhejiang Province, China Jiliang University, Hangzhou 310018, Zhejiang, China; 2.College of Electronic Information and Optical Engineering，Nankai University，Tianjin 300350, China；3.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)

Online:2022-03-01

摘要/Abstract

摘要： 为探讨裂纹时空演化规律，基于改进的声发射源定位方法和矩张量理论，反演双边开口的混凝土试件压剪破坏过程中裂纹位置、裂纹类型以及裂纹面的法线方向和运动方向。分析结果表明，试件在拉应力损伤破坏区域，拉伸型裂纹扩展占主导，在剪应力损伤破坏区域，剪切型裂纹扩展占主导。矩张量分析中不同类型裂纹的时空分布特征与试件实际受力和损伤情况相一致，说明矩张量理论能够有效描述拉应力、剪切应力的分布和迁移规律,这为深入研究混凝土损伤演化机理提供了有力工具。从声发射信号波形和小波时频图可以看出：拉伸型裂纹对应的声发射信号持续时间约为800 μs，频率范围是7~500 kHz；混合型裂纹和剪切型裂纹对应的声发射信号频率范围分别为7~500 kHz和7~250 kHz，持续时间相对较长，分别为1 720 μs和1 880 μs；剪切破裂要比拉伸破裂释放的能量多，同时剪切破裂释放的剪切波平均频率要比拉伸破裂释放的应力波平均频率低。

关键词: 声发射, 矩张量, 裂纹演化, 波形分析

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

中图分类号:

TB301

王宗炼, 王怀伟, 任会兰, 赵明岩, 罗志强. 基于声发射矩张量理论的混凝土裂纹机制反演[J]. 兵工学报, 2022, 43(1): 181-189.

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.

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基于声发射矩张量理论的混凝土裂纹机制反演

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

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