Topic
Acoustic emission
About: Acoustic emission is a research topic. Over the lifetime, 16293 publications have been published within this topic receiving 211456 citations.
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TL;DR: In this paper, the authors used the finite element code RFPA2D (Rock Failure Process Analysis) based on damage mechanics to simulate a loading-type failure process around an underground excavation (model tunnel) in brittle rock.
74 citations
TL;DR: In this article, the micromechanics of hydrostatic compaction and porosity reduction were investigated by acoustic emission (AE) and microscopy measurements at confining pressures up to 550 MPa and constant pore pressure up to 10 MPa.
74 citations
TL;DR: In this article, the authors describe measurements of acoustic emission RMS signals obtained from sliding metallic contacts and show that RMS measurements are able to differentiate between different wear mechanisms occurring in both dry and lubricated contacts.
74 citations
01 Jan 1988
TL;DR: Acousto-ultrasonics as mentioned in this paper is an NDE technique combining aspects of acoustic emission methodology with ultrasonic simulation of stress waves for detecting and mapping variations of mechanical properties, which is less concerned with flaw detection than with the assessment of the collective effects of various flaws and material anomalies.
Abstract: The nature and underlying rationale of the acousto-ultrasonic approach is reviewed, needed advanced signal analysis and evaluation methods suggested, and application potentials discussed. Acousto-ultrasonics is an NDE technique combining aspects of acoustic emission methodology with ultrasonic simulation of stress waves. This approach uses analysis of simulated stress waves for detecting and mapping variations of mechanical properties. Unlike most NDE, acousto-ultrasonics is less concerned with flaw detection than with the assessment of the collective effects of various flaws and material anomalies. Acousto-ultrasonics has been applied chiefly to laminated and filament-wound fiber reinforced composites. It has been used to assess the significant strength and toughness reducing effects that can be wrought by combinations of essentially minor flaws and diffuse flaw populations. Acousto-ultrasonics assesses integrated defect states and the resultant variations in properties such as tensile, shear, and flexural strengths and fracture resistance. Matrix cure state, porosity, fiber orientation, fiber volume fraction, fiber-matrix bonding, and interlaminar bond quality are underlying factors.
74 citations
TL;DR: In this article, the authors used acoustic emission technique (AET) for the investigation of local damages in materials and presented several methods to enhance the quality of such recordings or to improve the data analysis.
74 citations