Multiscale mechanics of shock wave processes / / Yurii Meshcheryakov

• Record Nr.: UNINA9910502653403321
• Autore: Meshcheryakov Yurii
• Pubbl/distr/stampa: Singapore : , : Springer, , [2021]; ©2021
• ISBN: 981-16-4530-2
• Descrizione fisica: 1 online resource (196 pages)
• Collana: Shock wave and high pressure phenomena
• Disciplina: 515.3535
• Soggetti: Shock waves - Mathematical models
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: Intro -- Preface -- Description of the Proposed Book -- Contents -- Part I Multiscale Deformation Fundamentals -- 1 The Kinetic Theory of Continuously Distributed Dislocations -- 1.1 The Dislocation Velocity Distribution Function -- 1.2 The Diffusion Coefficients of the Fokker-Planck Equation -- 1.3 Transport Equations -- References -- 2 Decay of Sub-microsecond Stress Pulses -- 2.1 Introduction -- 2.2 Dislocation Kinetics and Structure of Shock Waves -- 2.3 Decay of Sub-microsecond Stress Pulses -- References -- 3 The Collectivisation of Dislocations and Formation of Mesoscale -- 3.1 Introduction -- 3.2 Formation of Dynamic Mesostructures -- 3.3 Accounting for the Processes of Multiplication and Annihilation of Dislocations -- References -- 4 Concept of the Mesoscale in Quasistatics and Dynamics -- 4.1 Introduction -- 4.2 Quasistatics -- 4.3 Dynamics -- References -- 5 The Mesoscale Velocity Distribution and Change of Regime of Shock Wave Propagation -- 5.1 Introduction -- 5.2 The Change of Regime of Shock Wave Propagation -- 5.3 Irreversible Momentum Exchange -- 5.4 Resonance Interaction of Structures and Shock Waves -- 5.5 Discussion -- 5.6 Conclusions -- References -- 6 Multiscale Modelling of Steady Shock Wave Propagation -- 6.1 Introduction -- 6.2 Coupling Between the Strain Rate and the Mesoparticle Velocity Distribution -- 6.3 The Relaxation Model for a Steady Shock Wave -- 6.4 Account for the Mesoscopic Effects -- 6.5 Conclusions -- References -- 7 On the Chaotic and Translational Motions of Elementary Carriers of Deformation at the Mesoscale -- 7.1 ; Introduction -- 7.2 The Oscillating Regime of the Dynamically Deformed Heterogeneous Medium -- References -- Part II Mesoscale Approach to the Dynamic Properties of Materials -- 8 Experimental Techniques for Shock Loading -- 8.1 Introduction.; 8.2 Shock Loading Under Uniaxial Strain Conditions -- 8.3 The Pulse Loading of Plane Targets with a High-Power Electron Beam -- 8.4 The Penetration of Elongated Hard Rods into Plane Target -- References -- 9 How to Measure the Parameters of Mesoscale -- 9.1 Introduction -- 9.2 Experimental Techniques -- 9.3 Analysis of the Velocity Interferometer Under Conditions of Mesoparticle Velocity Distribution. -- 9.4 Investigation of Shock Wave Processes Using the Interference Technique -- 9.5 A Two-Channel Velocity Interferometer -- 9.6 The Asymmetry of the Mesoparticle Velocity Distribution Function -- 9.7 The Determination of the Velocity Distribution at Mesoscale 2 by Using a Line Imaging Velocity Interferometer (LIV) and a Multi-Point VISAR Interferometer -- 9.8 The Specific Features of the Diagnostic Technique Used -- References -- 10 On the Kinetic Nature of Structural Instability and Localisation of Dynamic Deformation -- 10.1 Introduction -- 10.2 Interscale Momentum Exchange and the Kinetic Criterion for Transition into a Structurally Unstable State -- 10.3 On the Resonance Excitation of Mesoscale -- 10.4 Scenario 1: Quasi-Equilibrium Dynamic Deformation Below Critical Strain Rate to Non-Equilibrium Dynamic Deformation Transition -- 10.5 Scenario 2: The Shock-Induced Non-equilibrium Dynamic Deformation to Quasi-Equilibrium Dynamic Deformation Transition. Large-Scale Formations at Small Spatio-Temporal Scales -- 10.6 Structural Instability Under Dynamic Compression and Resistance to High-Velocity Penetration -- 10.7 The Effect of Velocity Non-uniformity on Penetration Depth -- References -- 11 Mesoscopic Criteria for the Dynamic Strength of Materials -- 11.1 Introduction -- 11.2 Mesoscale Criteria for Dynamic Strength -- 11.2.1 40CrNiMo Steel -- 11.3 Microstructural Investigations -- 11.3.1 38CrNi3MoV Steel -- 11.3.2 4340 Steel.; 11.3.3 16Cr11Ni2V2MoV Steel -- 11.3.4 28Cr3CNiMoV Steel -- 11.4 Analysis of the Strength Behaviour of Steels -- 11.5 The Meso-macro-energy Exchange and Spallation -- 11.6 Conclusions -- 12 A Mesoscale Approach to Dynamic Recrystallisation -- 12.1 Introduction -- 12.2 The Reloading Regime as a Matter for Providing the Mesoscale Scenario for the Dynamic Recrystallisation -- 12.2.1 D-16 Aluminium Alloy -- 12.2.2 38CrNi3MoV -- 12.3 Regimes of Shock Wave Propagation and Dynamic Recrystallisation -- References -- 13 Multiscale Mechanisms of Dynamic Deformation Under High-Velocity Penetration -- 13.1 Introduction -- 13.2 Structural Instability and Spall Strength -- 13.3 The Structural Instability Threshold and High-Velocity Penetration -- 13.4 Resistance to High-Velocity Penetration and Velocity Defect -- 13.5 Spall Strength, Resistance to High-Velocity Penetration and Velocity Variance -- 13.6 Microstructural Investigations -- 13.7 Conclusions.

The battle for the Arab Spring : revolution, counter-revolution and the making of a new era / / Lin Noueihed and Alex Warren

• Record Nr.: UNINA9910790193903321
• Autore: Noueihed Lin
• Pubbl/distr/stampa: New Haven, Connecticut : , : Yale University Press, , [2012]; ©2012
• ISBN: 1-280-06222-3; 9786613519931; 0-300-18490-5
• Descrizione fisica: 1 online resource (371 p.)
• Disciplina: 909.097492708312
• Soggetti: Arab Spring, 2010-; Democracy - Arab countries; Protest movements - Arab countries - History - 21st century; Revolutions - Arab countries - History - 21st century; Arab countries Politics and government 21st century
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Bibliographic Level Mode of Issuance: Monograph
• Nota di bibliografia: Includes bibliographical references (pages [332]-338) and index.
• Nota di contenuto: Frontmatter -- Contents -- List of Illustrations -- Acknowledgements -- Introduction -- CHAPTER 1. An Arab Malaise -- CHAPTER 2. Bread, Oil and Jobs -- CHAPTER 3. The Media Revolution -- CHAPTER 4. Tunisia's Jasmine Revolution -- CHAPTER 5. Egypt: The Pharaoh Falls -- CHAPTER 6. Bahrain: An Island Divided -- CHAPTER 7. Libya's Revolution from Above -- CHAPTER 8. Disintegrating Yemen -- CHAPTER 9. The Struggle for Syria -- CHAPTER 10. The Kings' Dilemma -- CHAPTER 11. The Islamist Resurgence -- CHAPTER 12. Embracing the Void -- Afterword -- Endnotes -- Bibliography and Sources -- Index
• Sommario/riassunto: Sparked by the protest of a single vegetable seller in Tunisia, the flame of revolutionary passion swept across the Arab world in what has come to be called the Arab Spring of 2011. Millions took to the streets in revolt: the governments of Tunisia, Egypt, and Libya fell, other regimes remain embattled, and no corner of the region has escaped unchanged. In this informed and accessible book, Lin Noueihed and Alex Warren ; explain the economic and political roots of the Arab Spring, assess what has been accomplished so far, and consider the many stumbling blocks that confront the Arab nations as they try to shape their futures.Through research, interviews, and a wealth of firsthand experience, the authors explain the unique set of obstacles that endanger stability in each country. They analyze the challenges many Arab nations face in building democratic institutions, finding consensus on political Islam, overcoming tribal divides, and satisfying an insatiable demand for jobs. In an era of change and uncertainty, this insightful guide provides the first clear glimpse of the post-revolutionary future the Arab Spring set in motion.