LXXXV.The operational theory of solid friction

1938 ◽  
Vol 25 (171) ◽  
pp. 950-961 ◽  
Author(s):  
Louis A. Pipes
Keyword(s):  
Operational Theory ◽  
Solid Friction

Organizational Culture in the Focus of Improving Risk Management in the Enterprise

2020 ◽  
Vol 17 (4) ◽  
pp. 86-95
Author(s):  
R. M. Kachalov ◽  
Yu. A. Sleptsova
Keyword(s):  
Risk Management ◽  
Organizational Culture ◽  
Point Of View ◽  
Economic Risk ◽  
Management Activity ◽  
Economic Agents ◽  
Cultural Aspects ◽  
Industrial Enterprises ◽  
Operational Theory ◽  
Stable Forms

The article considers the manifestations of the phenomenon of economic risk in the socioeconomic ecosystems of industrial enterprises, examines and differentiates the pragmatic and cultural aspects of the concept of "economic risk management". In terms of methodology, the study is based on the operational theory of risk management, and also uses tools to describe the organizational culture of risk management. Pragmatic and cultural differences in the characteristics of economic risk are identified at the level of stable forms of management activity with the involvement of the main provisions of the operational theory of risk management. The phenomenon of risk is considered in the ontological space as an artificial category of activity of industrial enterprises and other economic agents that form a socio-economic ecosystem. This phenomenon is studied as a specific form of social communication associated with the desire to assess the uncertain future in the present time, mainly from the point of view of analysis and management of the level of economic risk in the enterprise.

Energy dissipation in solid friction

1999 ◽  
Vol 9 (3) ◽  
pp. 551-558 ◽  
Author(s):  
S. Ciliberto ◽  
C. Laroche
Keyword(s):  
Energy Dissipation ◽  
Solid Friction

scholarly journals RTA Mathematic Simulation Principles at the Autotechnical Expertise

2021 ◽  
Vol 334 ◽  
pp. 02026
Author(s):  
Badrudin Gasanov ◽  
Artem Efimov ◽  
Jurij Grebennikov
Keyword(s):  
Mathematical Model ◽  
Road Transport ◽  
Road Accident ◽  
Momentum Vector ◽  
The Road ◽  
Solid Friction ◽  
Strain Stress ◽  
Determination Methods ◽  
Determine Step ◽  
Energy Conservation Law

The features of carrying out an autotechnical expertise (ATE) are considered in case the vehicles (V) participating in the road transport accident (RTA) don’t leave skid imprints. The examples of momentum and energy conservation law application are given at developing the road accident mathematical model. Special attention is paid to the determination methods of vehicle (V) velocity, travel directions in various RTA diagrams and archeology of deformation. For this purpose it is offered to draw a momentum vector diagram. It is reasonable that for the calculation of V deformation at RTA it is necessary to determine step by step the strain-stress state in a contact area on the basis of the theories of elasticity, plasticity, solid friction and finite-element methods. The technique of constructing an RTA mathematical model is developed. It is recommended to use at ATE of RTAs at the runs-over into the fixed obstacle (a stationary V) and collisions.

Le role de la pression fluide dans les deformations tectoniques

1959 ◽  
Vol S7-I (6) ◽  
pp. 571-573
Author(s):  
Jean Goguel
Keyword(s):  
Lateral Pressure ◽  
Fluid Pressure ◽  
Hydrostatic Equilibrium ◽  
Excess Pressure ◽  
Tectonic Deformation ◽  
Lithostatic Pressure ◽  
Solid Friction

Abstract It has been shown by K. Hubbert and W. W. Rubey that fluid pressure may play an important role in tectonic deformation when it becomes greater than that required for hydrostatic equilibrium. When the impregnating fluid in rock is under such excess pressure, the conditions of solid friction are drastically altered. The limit is reached when fluid pressure becomes equal to lithostatic pressure; rocks could then be displaced freely with respect to one another. Rough calculations show that this limit need not be reached; all overthrusts, whether due to lateral pressure or flow, can take place easily if fluid pressure is 95-98 percent of lithostatic pressure. Possible mechanisms for producing excess pressure are discussed.

Energy-based Solid Friction Model for Combustion Engines

MTZ worldwide ◽  
2016 ◽  
Vol 77 (7-8) ◽  
pp. 70-74
Author(s):  
Jens Hadler ◽  
Christian Lensch-Franzen ◽  
Morten Kronstedt ◽  
Tahsin Doğuer
Keyword(s):  
Friction Model ◽  
Combustion Engines ◽  
Solid Friction

Specific Heat of Tribological Wear Debris Material

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Maria Maciąg
Keyword(s):  
Specific Heat ◽  
Thermodynamic Model ◽  
Wear Debris ◽  
Friction And Wear ◽  
Mass Conservation ◽  
Phenomenological Approach ◽  
Wear Testing ◽  
Physical Parameters ◽  
Friction Process ◽  
Solid Friction

Stationary processes of solid friction, heating and wear are analyzed in this paper on the basis of the first principle of thermodynamics. Analytical dependences between physical parameters of a tribological system have been determined. Densities of extensive quantity fluxes are referred to elementary surface and elementary time, which has permitted to include intensive quantities, especially temperature, in the model presented here. Although the discussion is restricted to the phenomenological approach, conclusions regarding some microscopic properties of the matter in the process of fragmentation are drawn directly from the laws of energy and mass conservation. Differences between specific heat of the starting material cp and of the debris produced cp′ are emphasized. The model of the friction process described by Maciąg, M. (2010, “Thermodynamic Model of the Metallic Friction Process,” ASME J. Tribol., 132(3), pp. 1–7) has been modified and a new method of evaluating cp′ is proposed. Results of standard friction and wear testing are used to describe selected tribological systems in quantitative terms based on the thermodynamic model discussed here (Sadowski, J., and Żurowski, W., 1992, “Thermodynamic Aspects of Metals' Wear-Resistance,” Tribol. Lubr. Eng., 3, pp. 152–159). Very high specific heat of tribological wear debris material is found at the moment of the material's production. To conclude, results of theoretical and experimental analysis are discussed and their interpretation is proposed. Applicability of the system magnitudes C and D to modeling of friction and wear is highlighted.

The Operational Theory of Meaning

1937 ◽  
Vol 46 (6) ◽  
pp. 644
Author(s):  
A. Cornelius Benjamin
Keyword(s):  
Theory Of Meaning ◽  
Operational Theory
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