In-situ health monitoring of a bonded composite patch using the strain ratio technique
In-situ health monitoring of a bonded composite patch using the strain ratio technique
复制标题
使用应变比技术对粘合复合材料补片进行原位健康监测
DOI：
10.1117/12.420878
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Baker
中科院分区：
文献类型：
--
作者：
S. Moss;S. Galea;I. Powlesland;M. Konak;A. Baker
压电（PVDF）传感器施加到一个专门制备的双面复合材料试样。用3Hz循环载荷使样本疲劳，直到复合材料补片和铝之间的粘合剂粘合失效。在循环加载期间，PVDF传感器的输出由原型“智能贴片装置”监测。智能贴片设备测量来自两个PVDF传感器的输出，一个在“贴片”上，一个在“远场”中，由此计算“贴片健康状态”。智能贴片设备成功检测到复合贴片从铝上剥离。被认为是影响的粘合剂喷圆角，它可以产生显着的应变在剥离部分的补丁，。最后，一些点有关的应变比技术的使用补丁状态的健康监测阐明。
Piezo-electric (PVDF) sensors were applied to a specifically prepared two-sided composite specimen. The specimen was fatigued with a 3Hz cyclic load until the adhesive bond between composite patch and aluminium failed. During the cyclic loading period the output from the PVDF sensors were monitored by a prototype "Smart Patch Device". The Smart Patch Device measured outputs from two PVDF sensors, one on the "patch" and one in the "far-field" from which was calculated a "Patch state of health". The Smart Patch Device successfully detected the composite patch disbonding from the aluminium. The effect of the adhesive spew fillet, which can produce significant strains in disbonded sections of patch, is considered. Finally a number of points in relation to the use of the strain ratio technique for patch state of health monitoring are elucidated..