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Now Available in Paperback This new book, Contact Dynamics: Method of Differential Specific Forces, describes the application of the method of the differential specific forces (MDSF). By using this new method, the solutions to the problems of a dissipative viscoelastic and elastic-plastic contacts between curvilinear surfaces of two solid bodies can be found. The novelty is that the forces of viscosity and the forces of elasticity can be found by an integration of the differential specific forces acting inside an elementary volume of the contact zone. This volume shows that this method allows finding the viscoelastic forces for any theoretical or experimental dependencies between the distance of mutual approach of two curvilinear surfaces and the radiuses of the contact area. Also, the derivation of the integral equations of the viscoelastic forces has been given and the equations for the contact pressure have been obtained. The viscoelastic and elastic-plastic contacts at impact between two spherical bodies have been examined. The equations for work and energy in the phases of compression and restitution and at the rolling shear have been obtained. Approximate solutions for the differential equations of movement (displacement) by using the method of equivalent work have been derived. This new method of differential specific viscoelastic forces allows us to find the equations for all viscoelastic forces. It is principally different from other methods that use Hertz’s theory, the classical theory of elasticity and the tensor algebra. In this new method, how to find the elastic and viscous forces by an integration of the differential specific forces in the infinitesimal boundaries of the contact area is explained. This method will be useful in research of contact dynamics of any shape of contacting surfaces. It also can be used for determination of the dynamic mechanical properties of materials and in the design of wear-resistant elements and coverings for components of machines and equipment that are in harsh conditions where they are subjected to the action of flow or jet abrasive particles. This volume will be useful for professional designers of machines and mechanisms as well as for the design and development of new advanced materials, such as wear-resistant elastic coatings and elements for pneumatic and hydraulic systems, stop valves, fans, centrifugal pumps, injectors, valves, gate valves, and in other installations. CONTENTS: About the Authors / Editors: Nikolay Goloshchapov, PhD Scientific Consultant, NNG—Engineering & Physics Consultancy, London, United Kingdom Nikolay Goloshchapov, PhD, has more than 30 years of experience in the fields of physics, mechanical engineering, tribology, and materials science, particularly physics and mechanics of materials and polymers and elastomers. He is currently an independent private scientific consultant at NNG—Engineering & Physics Science Consultancy, London, UK. He is a specialist in applied physics and math-mechanics, tribology, and fatigue life (the wear out and erosion of materials under collision of solids, particularly in optimizing the basic dynamic and mechanical qualities of visco-elastic materials and elastomers [rubbers] for their exploitation in gas jet or flow abrasive solids and substances in different temperatures and velocities of loading and impact). He has acted as a reviewer of articles for international journals on such topics as scientific instruments and nonlinear dynamics. Dr. Goloshchapov developed a method to define the time of fatigue of materials in process a using collision between solid bodies, and he researched the processes of erosion and durability of polymers and elastomers and other materials in a gas jet and in gas flow of abrasive particles under high and low temperatures. |
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AAP WELCOMES PROF. MOHAMMED KUDDUS, PhD, AS AAP’S NEW ACQUISITIONS EDITOR for books on biotechnology, enzymology, microbiology, bioinformatics, bioremediation, biomedical technology, value-added products etc. Dr. Kuddus is Head of the Department of Biochemistry at the College of Medicine, University of Hail, Kingdom of Saudi Arabia. He is listed in Elsevier/Stanford University World’s Top 2% Scientists. He seeks book proposals from potential editors to consider for publication with Apple Academic Press. Contact: kuddus@appleacademicpress.com for more information. AAP welcomes Dr. Maulin P. Shah as AAP’s new acquisitions editor for books on Applied Microbiology, Environmental Biotechnology and Waste Management. 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