Technological Perspectives from Two Decades of Fundamental Research in Dynamic Plasticity PDF Download
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Author: James F. Bell Publisher: ISBN: Category : Languages : en Pages : 108
Book Description
The report presents twenty-five years of systematic study of the physics of large deformation and, in particular, of dynamic plasticity of metals. This work includes the results obtained for the loading and unloading response of the fully annealed solid, a general theory of plasticity, the dynamic plastic limit, the experimental study of dynamic plasticity and the evolution of proper constitutive equations.
Author: James F. Bell Publisher: ISBN: Category : Languages : en Pages : 108
Book Description
The report presents twenty-five years of systematic study of the physics of large deformation and, in particular, of dynamic plasticity of metals. This work includes the results obtained for the loading and unloading response of the fully annealed solid, a general theory of plasticity, the dynamic plastic limit, the experimental study of dynamic plasticity and the evolution of proper constitutive equations.
Author: N. Cristescu Publisher: World Scientific ISBN: 981256747X Category : Technology & Engineering Languages : en Pages : 481
Book Description
Discusses the field of dynamic plasticity. This book includes research chapters as well as an introduction to the elementary theory of plasticity. It covers such areas as a chapter on rocks and soils, the various developments in research on rate type, and problems concerning non-homogenous Bingham fluids, such as flow along an inclined slope.
Author: Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
The principal objective of the research on this project has been to develop improved understanding of the plastic response of metals at strain rates of 100000 1/s and higher. This objective has been pursued primarily by the development of a strain-rate change test for probing the plastic response of a metal being sheared at strain rates of 105 1/s to 106 1/s in a pressure-shear plate impact experiment. Such a test makes it possible to distinguish between the rate sensitivity of the flow stress at fixed dislocation structure, and the rate sensitivity of strain hardening. These effects cannot be distinguished in the usual tests at constant strain rates. A second objective arises form the main result of the research on the principal objective; namely, that the rate sensitivity at high strain rates is associated primarily with the rate sensitivity of strain hardening. Consequently, improved understanding of strain hardening takes on greater importance and had been addressed as a second objective. Quasi-static compression tests have been conducted on aluminum single crystals to clarify the interaction between slip on one slip system and hardening on another. Such clarification is required to allow the development of reliable models for plastic flow based on slip on multiple slip systems.
Author: National Academies of Sciences, Engineering, and Medicine Publisher: National Academies Press ISBN: 0309490111 Category : Social Science Languages : en Pages : 493
Book Description
Adolescenceâ€"beginning with the onset of puberty and ending in the mid-20sâ€"is a critical period of development during which key areas of the brain mature and develop. These changes in brain structure, function, and connectivity mark adolescence as a period of opportunity to discover new vistas, to form relationships with peers and adults, and to explore one's developing identity. It is also a period of resilience that can ameliorate childhood setbacks and set the stage for a thriving trajectory over the life course. Because adolescents comprise nearly one-fourth of the entire U.S. population, the nation needs policies and practices that will better leverage these developmental opportunities to harness the promise of adolescenceâ€"rather than focusing myopically on containing its risks. This report examines the neurobiological and socio-behavioral science of adolescent development and outlines how this knowledge can be applied, both to promote adolescent well-being, resilience, and development, and to rectify structural barriers and inequalities in opportunity, enabling all adolescents to flourish.
Author: James F. Bell
Author: James F. Bell
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Author: N. Cristescu
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Author: National Academies of Sciences, Engineering, and Medicine