Flexoelectric strain gradient detection using Ba0.64Sr0.36TiO3 for sensing
Flexoelectric strain gradient detection using Ba0.64Sr0.36TiO3 for sensing
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DOI：
10.1063/1.4772803
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发表时间：
2012-12-17
影响因子：
4
通讯作者：
Jiang, Xiaoning
中科院分区：
文献类型：
--
作者：
Huang, Wenbin;Yan, Xiang;Jiang, Xiaoning
在结构健康监测中，应变梯度是最敏感的量度，应变梯度传感为在线监测裂纹的起始和扩展提供了另一种途径。在本研究中，将Ba0.64Sr0.36TiO3(BST)挠性电致应变梯度传感结构粘贴在铝板的开口附近，以监测试件在单轴动态载荷下的应变梯度变化。BST微棒的电荷输出与平均应变梯度呈良好的线性关系，灵敏度为88pcm，与假设键合厚度为30微米时的理论估计值吻合较好。(C)2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4772803]
Strain gradient sensing offers an alternative avenue for in-situ monitoring of onset and growth of cracks in structural health monitoring, where the strain gradient is the most sensitive measurand. In this study, flexoelectric strain gradient sensing structures using Ba0.64Sr0.36TiO3 (BST) were attached on the proximity of an open hole in an aluminum plate, to monitor strain gradient variations of the specimen under a uniaxial dynamic load. Charge outputs of the BST micro-bars showed good linearity with the average strain gradients, with a sensitivity of 88 pC m, which is in good agreement with the theoretical estimation by assuming a 30 mu m bonding thickness. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772803]