Friction and Lubrication in Mechanical Design P1 pdf

[...]... 114 115 116 118 135 142 158 230 246 ix Contents 7 Friction and Lubrication in Rolling/Sliding Contacts 7.1 Rolling Friction 7.2 Hydrodynamic Lubrication and Friction 7.3 Elastohydrodynamics in Rolling/Sliding Contacts 7.4 Friction in the Elastohydrodynamic Regime 7.5 Domains of Friction in EHD Rolling/Sliding Contacts 7.6 Experimental Evaluation of the Frictional Coefficient 7.7 The Empirical Formulas... Rolling Friction References 414 42 1 11 Friction- Induced Sound and Vibration 11.1 Introduction 11.2 Frictional Noise Due to Rubbing 11.3 Effect of Lubrication on Noise Reduction 11.4 Frictional Noise in Gears 1 1.5 Friction- Induced Vibration and Noise 1 1.6 Procedure for Determination of the Frictional Properties Under Reciprocating Sliding Motion References 423 423 423 430 432 437 12 Surface Coating... contacts and consequently reduces friction, wear, and noise [ 1 1 , 121 Scientific study of the friction, lubrication, and wear phenomena in all these regimes is now receiving considerable attention in modern engineering Friction is a primary cause of energy dissipation, and considerable economic savings can be made by better understanding of its mechanism and its control The operation of most modern engineering... role of friction in the generation of noise in mechanical systems, and Chapter 12 gives an introduction to surface coating technology, an area of growing interest to tribologists Finally, Chapter 13 discusses in some detail a number of experimental techniques developed by the author and his coworkers that can be useful in the study of friction, lubrication, wear, surface temperature, and thermally induced... direction, changing direction continuously and in a random fashion as sliding proceeded The general mechanisms which have been proposed to explain the nature of dry friction are reviewed in numerous publications (e.g., Moore [17]) The following is a summary of the concepts on which dry friction theories are based: Mechanical interlocking This was proposed by Amontons and de la Hire in 1699 and states that... movement, wasting effort, generating unwanted heat, and causing wear and damage to the contacting surfaces It is, however, hard to imagine the world without friction In a frictionless environment there will be no tractive forces to allow locomotion, gripping, braking, fastening, weaving, and many other situations which are fundamental to human life The earliest recorded attempt to reduce friction can... case illustrations and corresponding empirical equations relating the factors influencing surface durability in important tribological systems such as gears, bearings, brakes, fluid jet cutting, soil cutting, one-dimensional clutches, and animal joints Chapter 10 discusses the frictional resistance in micromechanisms Friction is considered a major factor in their implementation and successful operation... engineering systems such as machines, instruments, vehicles and computer hardware, etc is influenced by the occurrence of friction in some form or another Tribology, which is the name currently used to encompass the multitude of activities in this highly interdisciplinary subject, is now attaining a prominent place among the sciences [ 131 It continues to present challenges for those who are working in. .. Some Experimental Studies in Friction, Lubrication, Wear, and Thermal Shock 13.1 Frictional Interface Behavior Under Sinusoidal Force Excitation 13.2 Friction Under Impulsive Loading 13.3 Viscoelastic Behavior of Frictional Hertzian Contacts Under Ramp-Type Loads 13.4 Film Pressure in Reciprocating Slider Bearings 13.5 Effect of Lubricant Properties on Temperature and Wear in Sliding Concentrated Contacts... with intermediate roughness Friction was low for the highly polished surfaces and rose with increasing Introduction 9 surface roughness The rise in friction continued up to a roughness of about 10 pin, the same general level at which metallic contact stopped increasing However, whereas further increases in surface roughness caused a reduction in metallic contact, there was no significant effect on friction . 7 Friction and Lubrication in Rolling/Sliding Contacts 7.1 Rolling Friction 7.2 Hydrodynamic Lubrication and Friction 7.3 Elastohydrodynamics in Rolling/Sliding Contacts 7.4 Friction in. Analysis in Engineering Design: Second Edition, Revised and Expanded, Alexander Blake 70. An Introduction to the Design and Behavior of Bolted Joints: Second Edition, Revised and Expanded,. or mechanical, including photocopying, microfilming, and recording, or by any information storage and retrieval system, without permission in writing from the publisher. Current printing