Monitoring of Acoustic Emission Activity of Smart Stress Memory Patch to Estimate Maximum Fatigue Stress for Structural Health Monitoring
Monitoring of Acoustic Emission Activity of Smart Stress Memory Patch to Estimate Maximum Fatigue Stress for Structural Health Monitoring
复制标题
监测智能应力记忆贴片的声发射活动，以估计最大疲劳应力以进行结构健康监测
DOI：
10.2355/isijinternational.51.88
复制
发表时间：
2011
影响因子：
1.8
通讯作者：
M. Enoki
中科院分区：
文献类型：
--
作者：
S. Nambu;M. Enoki
一种新的传感工具，称为智能应力记忆贴片，这是由一个纯铜裂纹试样与薄的厚度，已在我们以前的研究中提出了估计疲劳损伤，如最大疲劳应力，循环次数和应力幅值的结构健康监测。在这项研究中，声发射（AE）活动的纯铜试样热处理在几个条件下进行了研究，因为最大疲劳应力可以估计的基础上的AE起始应力的凯泽效应。所得到的AE起始应力与屈服应力成正比，未观察到AE起始应力的缺口敏感性。研究了不同晶粒尺寸的Cu试样在再加载过程中的Kaiser效应。大晶粒Cu试样在再加载过程中的声发射起始应力低于前一次加载时的最大应力，而小晶粒Cu试样的声发射起始应力几乎等于首次加载时的最大应力。将疲劳载荷下的最大应力与声发射起始应力进行了比较，结果表明，采用热处理和引入缺口的电沉积Cu试件可以获得一个适合于智能应力记忆贴片的应力范围。
A new sensing tool called the smart stress memory patch, which is made of a pure Cu cracked specimen with thin thickness, has been proposed in our previous study to estimate fatigue damage such as maximum fatigue stress, number of cycles and stress amplitude for structural health monitoring. In this study, the acoustic emission (AE) activity of pure Cu specimens heat treated under several conditions was investigated because the maximum fatigue stress can be estimated on the basis of the AE onset stress in the Kaiser effect. The obtained AE onset stress was proportional to the yield stress, and the notch sensitivity of the AE onset stress was not observed. The Kaiser effect in Cu specimens with various grain sizes was examined during reloading. The AE onset stress of the Cu specimen with a large grain size during reloading was lower than the previous maximum stress, while the AE onset stress of that with a small grain size was almost equal to the maximum stress in the first loading. The applied maximum stress in fatigue loading was compared with the AE onset stress and the result shows that a suitable stress range for a smart stress memory patch can be obtained using the heat-treated and notch-introduced electrodeposited Cu specimen.
影响因子：
1.2
作者：
Ito, Kaita;Enoki, Manabu
通讯作者：
Enoki, Manabu