Y. Horie – författare

Both experimental and theoretical investigations make it clear that mesoscale materials, that is, materials at scales intermediate between atomic and bulk matter, do not always behave in ways predicted by conventional theories of shock compression. At these scales, shock waves interact with local material properties and microstructure to produce a hierarchy of dissipative structures such as inelastic deformation fields, randomly distributed lattice defects, and residual stresses. A macroscopically steady planar shock wave is neither plane nor steady at the mesoscale. The chapters in this book examine the assumptions underlying our understanding of shock phenomena and present new measurements, calculations, and theories that challenge these assumptions. They address such questions as: - What are the experimental data on mesoscale effects of shocks, and what are the implications? - Can one formulate new mesoscale theories of shock dynamics? - How would new mesoscale theories affect our understanding of shock-induced phase transitions or fracture? - What new computational models will be needed for investigating mesoscale shocks?

Much of the current interest in shock compression of porous solids stems from the desire to bond hard, refractory powders into strong and dense solids. However, while much is known about the effects of shock compression on monolithic materials, the unusual physical and chemical processes that take place when a porous medium is shocked have been little studied thus far. This volume -- with contributions by leading researchers in condensed matter physics, physical chemistry, metallurgy, mechanics, and materials science -- begins to address that gap. The focus is on heterogeneous deformation mechanisms, nonequilibrium thermodynamics, and chemical processes. The contributions discuss such topics as modeling the complex interplay of thermal, mechanical, and chemical processes; experimental data on pore collapse and their interpretation; and synthesis of new materials through shock-induced chemical reactions. By presenting not only the most recent results, but also the open questions that remain, these essays convey the excitement of developing a scientific basis for understanding shock compression of highly porous solids. Topics covered include > Shock Compression Science in Highly Porous Solids > Shock Loading of Porous High Explosives > Continuum Mixture Modeling of Reactive Porous Media > Two-Phase Media Model of Shock Compression with Chemical reaction > Constitutive Modeling of Shock-Induced Reactions in Powder Mixtures > Discrete-element Modeling of Shock Processes in Powders

The "Shock Wave Science and Technology Reference Library" is a numbered and bounded collection of specifically commissioned volumes on basic fundamental and applied aspects of shock wave science and technology. A unique collection, the library as a whole sets out to comprehensively and authoritatively cover and review the subject matter with all its ramifications. This book is the first of several volumes on solids in the library. These volumes are primarily concerned with high-pressure shock waves in solid media, including detonation, high-velocity impact, and penetration. All chapters are self-contained and can be read independently of each other, though they are of course thematically interrelated. They offer a timely reference for beginners, as well as professional scientists and engineers, on the foundations of shock waves in solids highlighting new viewpoints and burgeoning developments.

Research in the field of shock physics and ballistic impact has always been intimately tied to progress in development of facilities for accelerating projectiles to high velocity and instrumentation for recording impact phenomena. The chapters of this book, written by leading US and European experts, cover a broad range of topics and address researchers concerned with questions of material behaviour under impulsive loading and the equations of state of matter, as well as the design of suitable instrumentation such as gas guns and high-speed diagnostics. Applications include high-speed impact dynamics, the inner composition of planets, syntheses of new materials and materials processing. Among the more technologically oriented applications treated is the testing of the flight characteristics of aeroballistic models and the assessment of impacts in the aerospace industry.

The "e;Shock Wave Science and Technology Reference Library"e; is a numbered and bounded collection of specifically commissioned volumes on basic fundamental and applied aspects of shock wave science and technology. A unique collection, the library as a whole sets out to comprehensively and authoritatively cover and review the subject matter with all its ramifications. This book is the first of several volumes on solids in the library. These volumes are primarily concerned with high-pressure shock waves in solid media, including detonation, high-velocity impact, and penetration. All chapters are self-contained and can be read independently of each other, though they are of course thematically interrelated. They offer a timely reference for beginners, as well as professional scientists and engineers, on the foundations of shock waves in solids highlighting new viewpoints and burgeoning developments.

This book is the first of several volumes on solids in the Shock Wave Science and Technology Reference Library. This is a unique collection, and the library as a whole sets out to comprehensively and authoritatively cover and review at research level the subject matter with all its ramifications. All the chapters are self-contained and can be read independently of each other, though they are of course thematically interrelated.