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
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13. N. Garkunov, Triboengineering (in Russian), Moscow, 1985. 14. S. Bendat, Random Data Analysis and Measurement Procedures, New York, 1986. 15. M. M. M. V. , Acoustic Diagnostics and Monitoring at Fuel and Power Plants (in Russian), Moscow, 1998. 16. M. M. M. V. , Diagnostics of Materials and Structures of Fuel and Power Plants (in Russian), Moscow, 1999. 17. A. Collacott, Structural Integrity Monitoring, New York, 1985. 18. G. V. A. Shtremel, Acoustic emission characteristics describing single brittle crack, Defect Control (in Russian), 1994, no 12, pp.
CHAPTER 2 38 Theoretical models dealing with characteristic of acoustic waves emitted in friction can be conventionally divided into two groups, namely static and dynamic models. In the former case parameters of a tribosystem such as the geometric characteristics of the surfaces in contact, friction regimes (the sliding velocity and load) and the condition of the environment are assumed to be constant. At these conditions characteristics of elastic waves are calculated based on available data or plausible assumptions.
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. Based on sufficiently general assumptions on interaction between surfaces, we have developed a model (see Chapter 2) serving to explain a variety of amplitude distributions obtained in tribological experiments.