Wear — an entropy production model

Klamecki, Barney E.

doi:10.1016/0043-1648(80)90161-1

Cited by 52 publications

(32 citation statements)

References 5 publications

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“…Consequently, an equilibrium value of roughness exists, which corresponds to minimum friction [36]. The above derivation remains valid in the case of a more complicated (e.g., non-linear) dependencies instead of the linear dependencies of Equation 26. The only requirement is that the function R  versus R is decreasing and crosses zero.…”

Section: Feedback Loop Model For the Running-inmentioning

confidence: 99%

“…The endeavors to use thermodynamic methods to develop a general theory of wear have been taken by many researchers; however, most of these attempts had limited success due to the complexity of the equations involved and the difficulty of their solution [16,[26][27]. Doelling et al [28] experimentally correlated wear with entropy flow, dS/dt, at a wearing surface and found that wear was roughly proportional to the entropy produced for the steady sliding of copper on steel under boundary lubricated conditions.…”

Section: Wear and Entropymentioning

confidence: 99%

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Entropy in Tribology: in the Search for Applications

Nosonovsky

2010

Entropy

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Abstract:The paper discusses the concept of entropy as applied to friction and wear. Friction and wear are classical examples of irreversible dissipative processes, and it is widely recognized that entropy generation is their important quantitative measure. On the other hand, the use of thermodynamic methods in tribology remains controversial and questions about the practical usefulness of these methods are often asked. A significant part of entropic tribological research was conducted in Russia since the 1970s. Surprisingly, many of these studies are not available in English and still not well known in the West. The paper reviews various views on the role of entropy and self-organization in tribology and it discusses modern approaches to wear and friction, which use the thermodynamic entropic method as well as the application of the mathematical concept of entropy to the dynamic friction effects (e.g., the running-in transient process, stick-slip motion, etc.) and a possible connection between the thermodynamic and information approach. The paper also discusses non-equilibrium thermodynamic approach to friction, wear, and self-healing. In general, the objective of this paper is to answer the frequently asked question -is there any practical application of the thermodynamics in the study of friction and wear?‖ and to show that the thermodynamic methods have potential for both fundamental study of friction and wear and for the development of new (e.g., self-lubricating) materials.

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Section: Feedback Loop Model For the Running-inmentioning

confidence: 99%

Section: Wear and Entropymentioning

confidence: 99%

Entropy in Tribology: in the Search for Applications

Nosonovsky

2010

Entropy

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“…However, in addition a certain fascination with wear processes exists based on the idea that since wear is such a universally observed process it may be directly related to the fundamental nature of materials and processes (Klamecki, 1980). There are many different methods and standards which are used for wear evaluation, besides a branch between methods used for experimental research on wear, friction and lubrication of the compression mechanism.…”

Section: Scuffing Wear Contextmentioning

confidence: 99%

Methods of Wear Tests for Hermetic Reciprocating Compressors: An Overview

Almeida¹,

Barbosa²,

Fontes³

2016

HOLOS

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The refrigerants being used in vapor compression processes have specific thermodynamic properties, which are decisive for the performance of the compressor of the system. The Montreal and the Kyoto protocols initiated a discussion of alternative refrigerants, which lead to new requirements of the compressor. The reliability of reciprocal compressors has become a leading field for compressor research. One of the main tools in the reliability field is accelerated degradation/life testing (ADT or ALT). These tests are designed to provide life estimates or to define lower bounds of product/parts reliability at shortened time periods. The objective of this paper is to discuss the literature on accelerated life testing of reciprocating hermetic compressors, focusing on the wear of mechanical components. Several test methodologies are discussed as well as the procedures used to wear quantification. It is noted that there are numerous test methodologies. This fact can be attributed to the lack of standardization updated. Most authors have been focused the tests development to assess the scuffing occurrence in components. The evaluation of wear (qualitative and quantitative) is carried through optical microscopy techniques, scanning electron microscopy, surface roughness, physical-chemical analysis of the oil and electric power consumption. Test methodologies are presented based on critical analysis of the existing literature and the current scenario of refrigerants and lubricants development.

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“…A comprehensive review of the application of the concept of entropy in various research areas is given in Martyushev and Seleznev [11]. Entropy can be used in a fundamental way to quantify degradation, including tribological processes such as friction and wear [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Similarly, other forms of degradation such as fretting [28] and fatigue damage of materials are consequences of irreversible processes that tend to increase the entropy generation of in the material [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Review Of Relevant Workmentioning

confidence: 99%

An Entropy-Based Damage Characterization

Amiri

Modarres

2014

Entropy

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This paper presents a scientific basis for the description of the causes of damage within an irreversible thermodynamic framework and the effects of damage as observable variables that signify degradation of structural integrity. The approach relies on the fundamentals of irreversible thermodynamics and specifically the notion of entropy generation as a measure of degradation and damage. We first review the state-of-the-art advances in entropic treatment of damage followed by a discussion on generalization of the entropic concept to damage characterization that may offers a better definition of damage metric commonly used for structural integrity assessment. In general, this approach provides the opportunity to described reliability and risk of structures in terms of fundamental science concepts. Over the years, many studies have focused on materials damage assessment by determining physics-based cause and affect relationships, the goal of this paper is to put this work in perspective and encourage future work of materials damage based on the entropy concept.

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Wear — an entropy production model

Cited by 52 publications

References 5 publications

Entropy in Tribology: in the Search for Applications

Entropy in Tribology: in the Search for Applications

Methods of Wear Tests for Hermetic Reciprocating Compressors: An Overview

An Entropy-Based Damage Characterization

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