ACOUSTIC EMISSION MONITORING OF DAMAGE EVOLUTION DURING FATIGUE OF METAL-MATRIX COMPOSITES

机译：金属基复合材料疲劳损伤过程中的声发射监测

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The acoustic emission (AE) technique was employed for in-situ monitoring of damage evolution in metal matrix composites under fully reversed tension-compression loading at constant total strain amplitude. A strong correlation is obtained between AE and mechanical parameters characterizing fatigue damage of MMCs. The AE spectral analysis and unsupervised clustering are used for identification of active AE sources. A dominant role of particle breakage is demonstrated. Three stages of fatigue failure are observed and characterized by different rates of damage accumulation. It is demonstrated that the onset of final macroscopic crack initiation and propagation can be reliably detected by means of AE well before failure.

机译：声发射（AE）技术用于在恒定总应变振幅下完全反向拉伸-压缩载荷下原位监测金属基复合材料中的损伤演化。在AE和表征MMC疲劳损伤的机械参数之间获得了很强的相关性。 AE光谱分析和无监督聚类用于识别活动AE源。证明了颗粒破损的主要作用。观察到疲劳破坏的三个阶段，并以不同的损伤累积率来表征。结果表明，在破裂之前，可以通过AE可靠地检测出最终宏观裂纹的萌生和扩展。

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来源
《Eighth International Fatigue Congress Vol.3, Jun 3-7, 2002, Stockholm, Sweden》|2002年|p.1939-1948|共10页
会议地点 Stockholm(SE);Stockholm(SE)
作者
A.Vinogradov; H.Biermann; O.Hartmann;
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作者单位

Department of Intelligent Materials Engineering, Osaka City University, Osaka, 558-8585 Japan;

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会议组织
原文格式 PDF
正文语种 eng
中图分类一般工业技术;
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ACOUSTIC EMISSION MONITORING OF DAMAGE EVOLUTION DURING FATIGUE OF METAL-MATRIX COMPOSITES

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