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Introduction to Thermodynamics of Mechanical Fatigue

By Michael M. Khonsari, Mehdi Amiri

CRC Press – 2012 – 166 pages

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  • Add to CartHardback: $169.95
    978-1-46-651179-8
    September 17th 2012

Description

Fatigue is probabilistic in nature and involves a complex spectrum of loading history with variable amplitudes and frequencies. Yet most available fatigue failure prediction methods are empirical and concentrate on very specific types of loading. Taking a different approach, Introduction to Thermodynamics of Mechanical Fatigue examines the treatment of fatigue via the principles of thermodynamics. It starts from the premise that fatigue is a dissipative process and must obey the laws of thermodynamics. In general, it can be hypothesized that mechanical degradation is a consequence of irreversible thermodynamic processes. This suggests that entropy generation offers a natural measure of degradation.

An Entropic Approach to Fatigue and Degradation

Drawing on recent cutting-edge research and development, the authors present a unified entropic approach to problems involving fatigue. They introduce the fundamentals of fatigue processes and explore a wide range of practical engineering applications.

Fundamental Concepts and Methodologies

The book reviews commonly observed failure modes, discusses how to analyze fatigue problems, and examines the deformation characteristics of a solid material subjected to fatigue loading. It also looks at how to use thermodynamics to determine the onset of fatigue failure. In addition, the book presents methodologies for improving fatigue life and for accelerated fatigue testing.

Learn How to Apply the Entropic Approach to Fatigue Problems

Comprehensive and well organized, this work helps readers apply powerful thermodynamics concepts to effectively treat fatigue problems at the design stage. It offers an accessible introduction to a new and exciting area of research in the field of fatigue failure analysis.

Contents

Introduction to Mechanical Degradation Processes

Fatigue

Fracture

Wear

Fretting

Brinelling and False Brinelling

Corrosion

Creep

Thermal Shock

Impact

References

Fundamentals of Thermodynamics

Open and Closed Systems

Equilibrium and Nonequilibrium State

Steady and Unsteady State

Stable and Unstable State

The First Law of Thermodynamics

The Second Law of Thermodynamics

Entropy Flow and Entropy Generation

Entropy Balance Equation

References

Degradation-Entropy Generation (DEG) Theorem

Thermodynamic Forces and Flows

Relations between Thermodynamic Forces and Flows

The Degradation–Entropy Generation Theorem

References

Fatigue Mechanisms: An Overview

Multiscale Characteristics of Fatigue

Parameters Influencing Fatigue and Classification of Regimes

Fatigue and Energy Dissipation

Fatigue-Temperature Rise

References

Basic Thermodynamic Framework for Fatigue Analysis

Entropy Balance Equation of a Deformed Body

Entropy Change of a Thermally Deformed Solid

Clausius–Duhem Inequality

Thermodynamic Forces and Flows in Fatigue

References

Thermodynamic Assessment of Fatigue Failure

Limitation of Conventional Methods and the Need for Further Advances

Evaluation of Entropy Generation and Entropy Flow

Time to Failure

References

Damage Mechanics: An Entropic Approach

Introduction to Damage Mechanics

Continuum Damage Mechanics (CDM)

References

Self-Organization in Fatigue

Introduction to Self-Organization

Effect of Electric Current on Fatigue Life

Effect of Magnetic Field on Fatigue Life

Effect of Environment (Surface Cooling) on Fatigue Life

Self-Organization and Complexity

References

Entropic Fatigue: In Search for Applications

Application to Variable-Loading Amplitude and Structural Health Monitoring

Accelerated Fatigue Testing

Concluding Remarks

References

Index

Author Bio

Michael Khonsari is the holder of the Dow Chemical Endowed Chair and Professor of the Mechanical Engineering Department at Louisiana State University where he directs the Center for Rotating Machinery (CeRoM). Professor Khonsari is a fellow of ASME, STLE, and the American Association for the Advancement of Science (AAAS). He holds several patents and he has authored two books and over 240 archival journal articles, book chapters, and special publications. He is currently the chief editor of the ASME Journal of Tribology.

Mehdi Amiri earned his Ph.D. in mechanical engineering from Louisiana State University where he is currently a research associate in the Center for Rotating Machinery (CeRoM). His area of research is in the field of fatigue and fracture analysis. He holds one patent and has authored several journal publications. His research interests include thermal/fluid mechanics, thermodynamics, tribology, and failure analysis.

Name: Introduction to Thermodynamics of Mechanical Fatigue (Hardback)CRC Press 
Description: By Michael M. Khonsari, Mehdi Amiri. Fatigue is probabilistic in nature and involves a complex spectrum of loading history with variable amplitudes and frequencies. Yet most available fatigue failure prediction methods are empirical and concentrate on very specific types of loading. Taking...
Categories: Mechanics, Thermodynamics, Machine Design