Acoustic emission noise assessment of loaded members in laboratory and field environments

Tala Shokri; Navid Nemati; Antonio Nanni

doi:10.1117/12.915327

4 April 2012 Acoustic emission noise assessment of loaded members in laboratory and field environments

Tala Shokri, Navid Nemati, Antonio Nanni

Proceedings Volume 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012; 83471T (2012) https://doi.org/10.1117/12.915327
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

The Acoustic Emission (AE) technique plays a progressively significant role in the field of non-destructive testing (NDT) especially in structural health monitoring (SHM). Acoustic emissions are commonly defined as transient elastic waves in a material caused by the of localized stress release. In using AE for structural diagnostics, noise has always been a potential barrier. AE can be produced from sources not related to material damage including traffic or friction. The major challenge is the differentiation of signals relevant to the purpose of the monitoring - such as crack growth in a member - from noise of various origins. This paper deals with noise discrimination and introduces a novel approach for noise interpretation in AE data. AE activities recorded in field and lab environments for concrete and steel specimens are investigated in this study. Approaches for clustering and separation of AE signals based on multiple features extracted from experimental data are presented.

Citation Download Citation

Tala Shokri, Navid Nemati, and Antonio Nanni "Acoustic emission noise assessment of loaded members in laboratory and field environments", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83471T (4 April 2012); https://doi.org/10.1117/12.915327

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