By Victor M. Baranov,Evgeny M. Kudryavtsev,Gennady .A. Sarychev, et al.Elsevier|Elsevier Science||Elsevier ScienceAdult NonfictionScience, Technology, EngineeringLanguage(s): EnglishOn sale date: 08.04.2011Street date: 29.07.2011Preview

Show description

Read Online or Download Acoustic Emission in Friction PDF

Similar machinery books

Handbook of Pumps and Pumping: Pumping Manual International

Written by means of an skilled engineer, this ebook comprises useful details on all facets of pumps together with classifications, fabrics, seals, deploy, commissioning and upkeep. furthermore you will discover crucial details on devices, brands and providers around the world, delivering a distinct reference in your table, R&D lab, upkeep store or library.

Working guide to pump and pumping stations

A undeniable language consultant to the instruments and strategies had to determine potency, operating consultant to Pump and Pumping Stations presents training engineer and senior box team of workers with a brief yet rigorous exposition of pumps, together with purposes. during this booklet, readers locate specialist recommendation for deciding upon TDH, NPSH, BHP and motive force strength requisites, discharge temperature, parallel/series operation and their effect at the working stipulations; constructing system-head curves and function issues; pump choice for multi-product operations.

Additional info for Acoustic Emission in Friction

Example text

2. When the surfaces slide mutually their asperities are subjected to stochastic pulse loading due to the accidental formation and rupture of microcontacts. 3. The asperities fail due to fatigue. Given this, flake-like particles are formed whose characteristic sizes are in proportion to the contact spot size. The first two assumptions are traditional and widely used in both theoretical analysis and the interpretation of experimental data. The following should be noted with reference to the third assumption.

The basic drawback is that it is difficult to find regularities if the number of initial parameters of a problem to be solved is great. Besides, the problem of reconstruction of the pressure distribution belongs to ill-defined problems because data on microasperity dimensions, the approach of the surfaces in contact and other characteristics that are rough are used in calculations. To solve such a problem special algorithms should be applied which are not involved, as a rule. For this reason, from our viewpoint the data obtained in such a way should be carefully relied on.

Most researchers dealing with practical applications of AE phenomenon recognise as necessary the analysis of the amplitude distribution. It is naturally since a certain distribution of the pulse amplitude corresponds to each deformation mechanism or physical process inducing AE. Publications contain data on different types of the experimentally obtained amplitude distribution, namely exponential, Rayleigh, -distribution, power-series, etc. As our studies have shown (see Chapter 4) the amplitude distribution of AE at friction may vary from J -type to unimodal.

Download PDF sample

Rated 4.37 of 5 – based on 18 votes