Characterization of failure mechanism in composite materials through fractal analysis of acoustic emission signals
Characterization of failure mechanism in composite materials through fractal analysis of acoustic emission signals
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DOI：
10.1016/j.chaos.2004.12.042
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发表时间：
2004-12
影响因子：
7.8
通讯作者：
F. E. Silva;L. Gonçalves;D. B. B. Fereira-D.-B.-B.-Fereira-102222577;J. Rebello
中科院分区：
文献类型：
--
作者：
F. E. Silva;L. Gonçalves;D. B. B. Fereira-D.-B.-B.-Fereira-102222577;J. Rebello
本文对玻璃纤维增强聚合物基复合材料试样在拉伸和弯曲试验时的声发射信号进行了详细的数值研究。确定了试样在不同结构破坏时所发出的信号所具有的满足非平稳分布特征的各种分形指数。从这些指标与Hurst分析、去趋势波动分析、最小覆盖分析和箱数维数分析相关的结果来看，它们可以区分不同的破坏机制，因此它们构成了它们的标志。
In this paper it is presented a detailed numerical investigation of acoustic emission signals obtained from test samples of fibreglass reinforced polymeric matrix composites, when subjected to tensile and flexural tests. Various fractal indices, characteristic of the signals emitted at the different structural failures of the test samples and which satisfy non-stationary distributions, have been determined. From the results obtained for these indices, related to the Hurst analysis, detrended fluctuation analysis, minimal cover analysis and to the boxcounting dimension analysis, it has been shown they can discriminate the different failure mechanisms and, therefore, they constitute their signature.