Damage Mechanisms in Loaded Aramid Composites by Means of Embedded PVDF Acoustic Emission Sensors
Damage Mechanisms in Loaded Aramid Composites by Means of Embedded PVDF Acoustic Emission Sensors
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通过嵌入式 PVDF 声发射传感器研究加载芳纶复合材料的损伤机制
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Sarasini
中科院分区：
文献类型：
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作者：
C. Caneva;I. D. De Rosa;F. Sarasini
由于损伤形成的相对局部性质以及由此导致的结构完整性的降低，成本有效且可靠的损伤检测对于复合材料的利用至关重要。在现有的方法中，声发射（AE）被认为是在线和原位监测复合材料结构退化的一种潜在技术。这项工作的目的是研究嵌入式PVDF（聚偏氟乙烯）传感器和复合材料样品之间的相互作用，以及检测和表征的故障机制，在芳纶/环氧树脂弯曲试样使用嵌入式PVDF薄膜传感器获得的声发射数据。此外，它已实现了与表面贴装PVDF数据的比较。我们以前工作的结果（Caneva等人，2005）处理玻璃/环氧树脂复合材料的拉伸和弯曲行为，使得能够将该方法扩展到芳族聚酰胺/环氧树脂复合材料。使用声发射和扫描电子显微镜（SEM）的观察，使识别和理解测试的复合材料的失效机制。此外，令人满意的结果，这项工作强调，PVDF的应用显示出作为一个合适的纤维复合材料的声发射传感器的承诺。
Cost-effective and reliable damage detection is critical for the utilization of composite materials due to the relatively localised nature of damage formation and the resultant reduction in structural integrity. Of the methods available, Acoustic Emission (AE) is considered as one potential technology for on-line and in situ monitoring of structural degradation of composite materials. Purpose of this work was to study the interaction between embedded PVDF (polyvinylidene fluoride) transducers and composite samples as well as detect and characterize the failure mechanisms in aramid/epoxy flexural test specimens using acoustic emission data obtained by embedded PVDF film sensors. Furthermore, it has been realized a comparison with surface mounted PVDF data. Results of our previous works (Caneva et al., 2005) dealing with monitoring tensile and flexural behaviour of glass/epoxy composites enabled to extend this methodology to aramid/epoxy composites. The use of Acoustic Emission and Scanning Electron Microscopy (SEM) observations enabled to identify and understand the failure mechanisms of the composites tested. Furthermore, satisfactory results of this work highlighted that the application of PVDF shows promise as a suitable acoustic emission transducer for fibrous composite materials.