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首页> 美国卫生研究院文献>Materials >Damage Propagation Analysis in the Single Lap Shear and Single Lap Shear-Riveted CFRP Joints by Acoustic Emission and Pattern Recognition Approach
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Damage Propagation Analysis in the Single Lap Shear and Single Lap Shear-Riveted CFRP Joints by Acoustic Emission and Pattern Recognition Approach

机译：通过声发射和模式识别方法在单圈剪切和单圈剪切铆接CFRP接头中损伤传播分析

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摘要

An innovative way of using the Acoustic Emission (AE) technique is introduced in this research work. The ratio of recorded acoustic energy and the counts recorded for each acoustic event were used for characterizing Carbon Fiber Reinforced Plastic (CFRP) laminates adhesively bonded with and without mechanical fasteners. The cumulative counts and cumulative energy of the recorded acoustic events were used for identifying the critical points of failure under loading of these hybrid joint specimens. The peak amplitude distribution was used for identifying the different damage modes such as delamination, matrix cracking and fiber breakage, albeit, ineffectively. The new parameter energy per count was introduced in this work, which can successfully identify the different damage modes under loading. To differentiate the damage modes using the energy per count, they were clustered using k-means++ pattern recognition technique. The method introduced in this work can estimate the damage modes of the CFRP specimens.
机译：在本研究工作中介绍了使用声发射（AE）技术的创新方法。记录的声能和针对每个声学事件记录的计数的比率用于表征碳纤维增强塑料（CFRP）层压板，层压板与机械紧固件粘合。记录的声学事件的累积计数和累积能量用于识别这些杂交联合标本的负载下的失效临界点。峰值幅度分布用于识别不同损伤模式，例如分层，基质裂化和纤维破裂，尽管如此。在这项工作中引入了每次数量的新参数能量，这可以成功识别加载下的不同损坏模式。为了使用每计数的能量来区分损坏模式，它们使用K-Means ++模式识别技术进行聚类。本作作品中引入的方法可以估计CFRP样本的损伤模式。

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