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: 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: Elsevier ISBN: 0323163297 Category : Technology & Engineering Languages : en Pages : 627
Book Description
Dynamic Plasticity discusses the problems encountered in the theory of dynamic deformation of plastic bodies. The book describes one-dimensional problems involving a single component of stress, particle velocity, and single spatial coordinate. The propagation of longitudinal elastic-plastic waves in thin rods or wires is a simple example of this problem of dynamic plasticity. Another one-dimensional problem, which has various possible transverse motions, is the dynamics of extensible strings. This problem is associated in calculations dealing with cables of suspension bridges, of elevator cables, of electric cables. The analogy with the mechanics of extensible strings can be extended to circular and rectangular membranes such as explained by Karunes and Onat. Karunes and Onat analyzed the propagation of transverse and longitudinal shock waves in such membranes using the Rakhmatulin theory for strings. The text also discusses axi-symmetrical problems and the problems of soil mechanics when applied to soft soils. The book can prove valuable to civil engineers, structural engineers, physicist, and students of mechanical engineering or industrial design.
Author: P.M. Dixit Publisher: CRC Press ISBN: 1466506180 Category : Science Languages : en Pages : 606
Book Description
Explores the Principles of Plasticity Most undergraduate programs lack an undergraduate plasticity theory course, and many graduate programs in design and manufacturing lack a course on plasticity—leaving a number of engineering students without adequate information on the subject. Emphasizing stresses generated in the material and its effect, Plasticity: Fundamentals and Applications effectively addresses this need. This book fills a void by introducing the basic fundamentals of solid mechanics of deformable bodies. It provides a thorough understanding of plasticity theory, introduces the concepts of plasticity, and discusses relevant applications. Studies the Effects of Forces and Motions on Solids The authors make a point of highlighting the importance of plastic deformation, and also discuss the concepts of elasticity (for a clear understanding of plasticity, the elasticity theory must also be understood). In addition, they present information on updated Lagrangian and Eulerian formulations for the modeling of metal forming and machining. Topics covered include: Stress Strain Constitutive relations Fracture Anisotropy Contact problems Plasticity: Fundamentals and Applications enables students to understand the basic fundamentals of plasticity theory, effectively use commercial finite-element (FE) software, and eventually develop their own code. It also provides suitable reference material for mechanical/civil/aerospace engineers, material processing engineers, applied mechanics researchers, mathematicians, and other industry professionals.
Author: L. M. Kachanov Publisher: Courier Corporation ISBN: 0486435830 Category : Technology & Engineering Languages : en Pages : 513
Book Description
Intended for use by advanced engineering students and practicing engineers, this volume focuses on the plastic deformation of metals at normal temperatures, as applied to the strength of machines and structures. It covers problems associated with the special nature of plastic state and important applications of plasticity theory. 1971 edition.
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Author: James F. Bell
Author: N. Cristescu
Author: Ting Yung Wei
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Author: National Science Foundation (U.S.)
Author: P.M. Dixit
Author: 
Author: L. M. Kachanov
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