Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission
Investigation of the damage mechanisms for mode I delamination growth in foam core sandwich composites using acoustic emission
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DOI：
10.1177/1475921714568403
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发表时间：
2015-05-01
影响因子：
6.6
通讯作者：
Minak, Giangiacomo
中科院分区：
文献类型：
--
作者：
Fotouhi, Mohamad;Saeedifar, Milad;Minak, Giangiacomo
在这篇文章中，声发射监测用于识别不同类型的损伤机制，发生在夹层结构的分层。利用声发射信号的特征和小波信号处理技术，对脱层试验过程中的失效机理进行了判别。根据不同频率范围内的功率谱密度和各分量的能量分布准则，对主要损伤机制进行了分类。并利用扫描电子显微镜对声发射研究结果进行了验证。结果表明，频域分析和小波分析是识别和区分夹层结构不同损伤机制的有效工具。
In this article, acoustic emission monitoring was used to identify different types of damage mechanisms which occur during delamination of sandwich structures. Features of the obtained acoustic emission signals and wavelet-based signal processing technique were utilized to discriminate failure mechanisms during the delamination test. Dominant damage mechanisms were classified based on their power spectral density in distinct frequency ranges and the energy distribution criterion in each component. The scanning electron microscopy was also employed to verify the results which were obtained from the acoustic emission investigation. It was concluded that frequency domain analysis and wavelet analysis are efficient tools for identification and discrimination of different damage mechanisms in sandwich structures.