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首页> 外文会议>Conference on Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring Mar 6-8, 2001, Newport Beach, USA >Hybrid transient-parametric AE analysis of histories of damage micromechanisms in composites
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Hybrid transient-parametric AE analysis of histories of damage micromechanisms in composites

机译：复合材料损伤微观机理历史的混合瞬态参数AE分析

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摘要

The problem of microdamage evolution in advanced composites is addressed in this paper. A combination of transient waveform classification and multiparametric filtering is used to extract the histories of damage evolution in a unidirectional graphite/epoxy composite loaded in the fiber and transverse directions. Three characteristic AE waveforms with different amplitudes, durations, and frequency spectra are identified based on the transient analysis. The waveforms are associated with matrix cracks, fiber breaks, and longitudinal splitting in the composite. Parametric regions for the characteristic waveforms are identified in the amplitude-risetime parametric space. Multiparametric filtering is applied to extract the microdamage evolution histories. The method is expected to be advantageous for the real-time damage and fracture monitoring of composite structures.
机译：本文讨论了高级复合材料中微损伤演变的问题。瞬态波形分类和多参数滤波的组合用于提取在纤维和横向上加载的单向石墨/环氧树脂复合材料中损伤演化的历史。基于瞬态分析，可以识别出具有不同幅度，持续时间和频谱的三个特征声发射波形。波形与复合材料中的基体裂纹，纤维断裂和纵向断裂有关。在幅度上升时间参数空间中标识出特征波形的参数区域。应用多参数过滤来提取微损伤演化历史。期望该方法对于复合结构的实时损伤和断裂监测是有利的。

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