Classification of cracking mode in concrete by acoustic emission parameters
Classification of cracking mode in concrete by acoustic emission parameters
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DOI：
10.1016/j.mechrescom.2011.03.007
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发表时间：
2011-04-01
影响因子：
2.4
通讯作者：
Aggelis, Dimitrios G.
中科院分区：
文献类型：
--
作者：
Aggelis, Dimitrios G.
研究了几种混凝土在弯曲过程中的声发射监测。不同压裂段发出的信号具有不同的特征。在实验过程中，获得的波形的频率和形状参数发生位移，与断裂机制从拉伸微断裂到脆性宏观断裂和纤维拔出的顺序密切相关。提出了一些声发射指标，使用这些指标可以根据裂缝的模式对裂缝进行分类。该研究揭示了胶凝材料的断裂过程，并对最终破坏进行预警。该方案的简单性使其适用于现场。(C) 2011 Elsevier Ltd.版权所有。
The study occupies with acoustic emission monitoring of several types of concrete during bending. The signals emitted at the different fracturing stages exhibit distinct signatures. Specifically, frequency and shape parameters of the acquired waveforms shift during the experiment, closely following the sequence of fracture mechanisms from tensile micro-cracking to brittle macro-cracking and fiber pull out. A number of AE indices are proposed, the use of which will enable classification of the cracks according to their mode. The study sheds light to the fracture process of cementitious materials, and enables a warning against the final failure. The simplicity of the scheme renders it applicable in situ. (C) 2011 Elsevier Ltd. All rights reserved.