Experimental study on damage evolution of steel strands based on acoustic emission signals and rate process theory

被引：2

作者：

Deng Y. ^{[1
]}

Ding Y. ^{[1
]}

Li A. ^{[1
]}

机构：

[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2010年 / 40卷 / 06期

关键词：

Acoustic emission; Damage evolution; Probability density; Rate process theory; Steel strands;

D O I：

10.3969/j.issn.1001-0505.2010.06.021

中图分类号：

学科分类号：

摘要：

In order to realize the real time quantitative evaluation of the damage of steel strands, an equation relating the damage evolution of steel strands to characteristic parameters of acoustic emission (AE) signals was established by using the AE rate process theory. The AE technique was employed to dynamically monitor the tensile process of the steel strands. On this basis, the probability density function of AE events and the damage evolution equation were deduced by using the polynomial model. The results show that the AE signals stem from the friction among the wires during the elastic stage and the AE signals in the plastic stage derive from the plastic deformation of wires. Besides, the relationship between the AE cumulative counts curves and the loading curve was observed to change simultaneously, and the AE cumulative counts curves can well describe the process of damage occurrence and development in steel strands. The analysis results verify the effectiveness and accuracy of the damage evolution equation established using AE technique and rate process theory in the quantitative damage evaluation of steel strands.

引用

页码：1238 / 1242

页数：4

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