Acoustic emission testing

Continued part 1, part 2 of ebook "Seismic safety of high arch dams" includes the following main contents: Chapter 12 - The experimental research on the dynamic and static mechanical characteristics of dam concrete and the constitutive materials; Chapter 13 - Experimental study of dynamic and static damage failure of concrete dam based on acoustic emission technology; Chapter 14 - Testing research on large dam concrete dynamic-static damage and failure based on CT technology; Chapter 15 - Research on numerical analysis of full gradation large dam concrete dynamic behaviors;...

315p khuynhlinhnguyet1009 05-04-2024 3 1   Download

Ebook "Earthquakes and acoustic emission" presented have been classified into two categories: Seismic Mechanics and Earthquakes (Part 1), Structural Failure and Acoustic Emission (Part 2), with the aim of bringing together the latest achievements at world-wide level from mechanics of materials to geophysics and presenting the applied (for non-destructive testing and failure evaluation) and theoretical (for critical phenomena in complex systems) implications of earthquakes and acoustic emission monitoring.

212p dieptieuung 19-07-2023 9 3   Download

This paper focused on evaluating those properties based on the data of acoustic emission and electrical contact voltage signal. Frictional experiments based on scratch test and pin-on-flat model were conducted with CrN coating, lubricant samples to obtain some experimental data, including contact pressure, friction force, friction coefficient, acoustic emission, and contact voltage.

12p vidudley 20-02-2023 6 2   Download

In this paper, aiming to improve this classification technique, authors have performed tensile test on concrete specimen in order to determine the signal parameters as well as waveforms and to assess the influence of material to wave propagation. After filtering the raw data, the usual RA-AF classification process is used to determine the proportion of each type of damage (Mode I and Mode II).

6p viedison2711 03-09-2019 10 0   Download

Acoustic emission (AE) is a phenomenon in which elastic or stress waves are emitted from rapid, localized change of strain energy in material. The practical application of the AE first emerged in the 1950's, but only in the last 20 years the science, technology and applications of AE have progressed significantly.

230p lyly_5 22-03-2013 63 8   Download

The Nondestructive testing science is a broad field that covers variety of testing methods and applications, in addition to the associated pre and post processing mathematics. In terms of methods and techniques the Nondestructive testing modalities rely on different physical phenomena such as the electromagnetism, the acoustic emission, the thermal emission and the penetration of high-energy radiation through materials and structures.

264p qsczaxewd 25-09-2012 86 16   Download

According to ASTM Standard Guide nondestructive term Test, the sound emission is usually defined as the class of phenomena whereby transient elastic waves generated by the rapid release of energy from source localization in the material. Energy consumption is essentially due to phase converter, crack formation and development, friction or movement of dislocations. Acoustic emission signal can be generated by phenomena such as cavitation, leakage, solidification and liquefaction.

174p lulanphuong 27-03-2012 73 7   Download

Sound emission (AE) is one of the most important test non-destructive (NDT) methods of materials, construction and machinery. The sound emission method with most other technical non-destructive testing in two important respects. first of all, the signal source is always located inside the investigated materials / structures. The second important thing is the NDT method to detect geometrical discontinuities, while emission sound motion detection errors.

408p lulanphuong 27-03-2012 79 12   Download