Relation between the amplitude of acoustic emission of an ensemble of microflaws and the deformation rate: Reconstruction of the number of AE events during a change in the dynamic range of detected signals

被引：7

作者：

Builo, S. I. ^{[1
]}

机构：

[1] Rostov State Univ, Vorovich Inst Mech & Appl Math, Rostov Na Donu 344090, Russia

来源：

RUSSIAN JOURNAL OF NONDESTRUCTIVE TESTING | 2007年 / 43卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S1061830907030084

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A model of acoustic emission from a dislocation cluster during its passage through a boundary is considered. A dependence of the amplitude of an acoustic-emission (AE) event on the deformation rate and the loading frequency has been obtained. Algorithms for reconstructing the number of lost AE events below the discrimination threshold of the instrumentation are obtained for the case of a power-law amplitude distribution. A method for correcting the parameters of the detected stream of events at various discrimination thresholds, deformation rates, and loading frequencies is described. A method for estimating the dynamic range on the basis of the average value of the detected AE-signal amplitudes is proposed. We propose using the results of this study for increasing the reliability of the AE method for diagnostics of a prebreakdown state.

引用

页码：188 / 195

页数：8