Acoustic emission monitoring of fatigue crack propagation
Acoustic emission monitoring of fatigue crack propagation
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DOI：
10.1016/s0143-974x(02)00064-0
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发表时间：
2003-06-01
影响因子：
4.1
通讯作者：
Talebzadeh, M
中科院分区：
文献类型：
--
作者：
Roberts, TM;Talebzadeh, M
本文介绍了用一种先进的声发射系统对钢和焊接钢紧凑拉伸和T形截面梁试件的疲劳裂纹扩展进行监测的方法。紧凑的拉伸试验样本经受0.1、0.3、0.5和0.7的载荷比，而T形截面梁经受0.3的载荷比。定位的声发射事件被过滤为包含疲劳裂纹的窄带，并分离为施加的载荷范围的不同区域。测试结果表明，声发射计数率，为小百分比的施加的负载范围接近峰值负载，显示合理的相关性与裂纹扩展速率。基于这些相关性，有可能从短期声发射监测结果预测疲劳损伤结构的剩余使用寿命。(C)2002爱思唯尔科技有限公司版权所有。
The monitoring of fatigue crack propagation in steel and welded steel compact tension and T-section girder test specimens, using an advanced acoustic emission system with accurate source location, is described. The compact tension test specimens were subjected to load ratios of 0.1, 0.3, 0.5 and 0.7 while the T-section girders were subjected to a load ratio of 0.3. Located acoustic emission events were filtered for a narrow band containing the fatigue crack, and separated for different regions of the applied load range. The test results indicate that acoustic emission count rates, for small percentages of the applied load range close to the peak load, show reasonable correlation with crack propagation rates. Based on these correlations it may be possible to predict the remaining service life of fatigue damaged structures from the results of short term acoustic emission monitoring. (C) 2002 Elsevier Science Ltd. All rights reserved.