利用声发射信号研究铝钛层压板的断裂过程。

Using AE Signals to Investigate the Fracture Process in an Al-Ti Laminate.

作者信息

Świt Grzegorz, Krampikowska Aleksandra, Pała Tadeusz, Lipiec Sebastian, Dzioba Ihor

机构信息

Department of Strength of Materials, Concrete Structures and Bridges, Faculty of Civil Engineering and Architecture Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, Poland.

Department of Machine Design, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. 1000-lecia PP 7, 25-314 Kielce, Poland.

出版信息

Materials (Basel). 2020 Jun 29;13(13):2909. doi: 10.3390/ma13132909.

DOI:10.3390/ma13132909

PMID:32610463

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7372479/

Abstract

The paper describes tests conducted to identify the mechanisms occurring during the fracture of single-edge notches loaded in three-point bending (SENB) specimens made from an Al-Ti laminate. The experimental tests were complemented with microstructural analyses of the specimens' fracture surfaces and an in-depth analysis of acoustic emission (AE) signals. The paper presents the application of the AE method to identify fracture processes in the layered Al-Ti composite using a non-hierarchical method for clustering AE signals (k-means) and analyses using waveform time domain, waveform time domain (autocorrelation), fast Fourier transform (FFT Real) and waveform continuous wavelet based on the Morlet wavelet. These analyses made it possible to identify different fracture mechanisms in Al-Ti composites which is very significant to the assessment of the safety of structures made of this material.

摘要

本文描述了为确定由铝钛层压板制成的三点弯曲（SENB）单边缘切口试样断裂过程中发生的机制而进行的试验。实验测试辅以对试样断裂表面的微观结构分析以及对声发射（AE）信号的深入分析。本文介绍了AE方法在使用非分层AE信号聚类方法（k均值）识别层状铝钛复合材料断裂过程中的应用，以及基于Morlet小波的波形时域、波形时域（自相关）、快速傅里叶变换（FFT实部）和波形连续小波分析。这些分析使得识别铝钛复合材料中的不同断裂机制成为可能，这对于评估由这种材料制成的结构的安全性非常重要。