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尺寸对纺织增强复合材料板声学性能的影响。

Dimension Effects on the Acoustic Behavior of TRC Plates.

作者信息

Ospitia Nicolas, Aggelis Dimitrios G, Tsangouri Eleni

机构信息

Department of Mechanics of Materials and Constructions (MeMC), Vrije Universiteit Brussel, 1050 Brussel, Belgium.

出版信息

Materials (Basel). 2020 Feb 20;13(4):955. doi: 10.3390/ma13040955.

DOI:10.3390/ma13040955
PMID:32093367
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7079622/
Abstract

Acoustic emission (AE) is a monitoring technique that has proven its suitability in and outside of the laboratory in characterizing the structural condition of materials. In composites for construction and repair, several breakthroughs have been recently noted involving mainly fracture mode evaluation based on the AE waveform characteristics. However, the acquired signals, apart from the cracking source strongly depend on the size and shape of the plate specimens. While the effect of wave propagation distance has been studied, the effect of the lateral dimension of the plate has not been given proper attention, being a broken link in translating the results from small coupons to real size plates. This paper examines wave propagation from artificial sources as well as actual AE signals in textile-reinforced cement (TRC) plates indicating the strong differences in the results that are attributed just to the shape and size of the specimens and showing that interpretation toward the actual sources is firmly connected to geometric factors.

摘要

声发射（AE）是一种监测技术，已在实验室内外证明其适用于表征材料的结构状况。在用于建筑和修复的复合材料中，最近有几项突破，主要涉及基于声发射波形特征的断裂模式评估。然而，除了裂纹源之外，采集到的信号还强烈依赖于板状试样的尺寸和形状。虽然已经研究了波传播距离的影响，但板的横向尺寸的影响尚未得到应有的关注，这是将小试样的结果转换为实际尺寸板时的一个缺失环节。本文研究了纺织增强水泥（TRC）板中来自人工源的波传播以及实际声发射信号，表明结果的巨大差异仅仅归因于试样的形状和尺寸，并表明对实际源的解释与几何因素密切相关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/f60bc27fb65e/materials-13-00955-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/e83c06a8dcb4/materials-13-00955-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/138c1ab1a48e/materials-13-00955-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/de88c07129c3/materials-13-00955-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/695a9878e49a/materials-13-00955-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/68cc21e2e527/materials-13-00955-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/8044d84986fe/materials-13-00955-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/38d5aea03de2/materials-13-00955-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/35036758ffa6/materials-13-00955-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/f60bc27fb65e/materials-13-00955-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/e83c06a8dcb4/materials-13-00955-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/1cab7c9f4d8e/materials-13-00955-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/b55fd8633d9d/materials-13-00955-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/311a054fa8e2/materials-13-00955-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/138c1ab1a48e/materials-13-00955-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/de88c07129c3/materials-13-00955-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/695a9878e49a/materials-13-00955-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/68cc21e2e527/materials-13-00955-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/8044d84986fe/materials-13-00955-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/38d5aea03de2/materials-13-00955-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/35036758ffa6/materials-13-00955-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3158/7079622/f60bc27fb65e/materials-13-00955-g012.jpg

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New approaches for automatic threedimensional source localization of acoustic emissions--Applications to concrete specimens.声发射自动三维源定位的新方法——在混凝土试件中的应用
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Modeling of acoustic emission signal propagation in waveguides.波导中声发射信号传播的建模。
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Acoustic source localization.声源远定位。
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