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首页> 外文期刊>Composites Science and Technology >Health Monitoring Of Carbon/carbon, Woven Reinforced Composites. Damage Assessment By Using Advanced Signal Processing Techniques. Part I: Acoustic Emission Monitoring And Damage Mechanisms Evolution
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Health Monitoring Of Carbon/carbon, Woven Reinforced Composites. Damage Assessment By Using Advanced Signal Processing Techniques. Part I: Acoustic Emission Monitoring And Damage Mechanisms Evolution

机译：碳/碳纤维编织复合材料的健康监测。通过使用高级信号处理技术进行损害评估。第一部分：声发射监测和破坏机理的演变

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摘要

The present work, first of two parts, deals with three types of woven carbon/carbon (C/C) composites having differentiations during the manufacturing procedure, which influences their fibre/matrix interface. All material types were tested under tensile loading in a load-unload-reload configuration, with online acoustic emission monitoring. Unsupervised pattern recognition algorithms were utilized to classify the acoustic emission (AE) data recorded during the tests. The resulted clusters, concluded by the analysis of AE hits, are associated with the damage mechanisms of the material, activated at the different load levels, and significant remarks were extracted regarding the damage evolution and its differentiation according to the different fibre/matrix interfaces. Emphasis is given on the impact of the different interface types upon the total mechanical behavior and damage accumulation at the test coupons. A qualitative evaluation of the interfaces using non-destructive testing data is also attempted. This first part intends to propose methodologies and procedures to analyze data from online acoustic emission monitoring in order to extract useful information regarding the damage evolution within C/C materials.
机译：本工作分为两部分，首先涉及三种类型的机织碳/碳（C / C）复合材料，它们在制造过程中会产生差异，从而影响其纤维/基质界面。所有材料类型均在载荷-卸载-再加载配置下进行拉伸载荷测试，并具有在线声发射监测功能。利用无监督模式识别算法对测试期间记录的声发射（AE）数据进行分类。通过对AE命中的分析得出的结论，这些簇与材料的损伤机理相关联，并在不同的载荷水平下被激活，并且根据损伤的演变及其根据不同的纤维/基质界面的差异，提取了重要的评论。重点介绍了不同界面类型对总机械性能的影响以及在试样上的损伤累积。还尝试使用无损测试数据对接口进行定性评估。第一部分旨在提出分析在线声发射监测数据的方法和程序，以提取有关C / C材料中损伤演变的有用信息。

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