The Effect of Stress Concentration on the Fracture and Deformation Characteristics of Ceramics and Metals PDF Download
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Author: Volker Weiss Publisher: ISBN: Category : Ceramic materials Languages : en Pages : 72
Book Description
The effects of non-uniform stress distributions on fracture strength were studied on four mate rials that exhibit brittle behavior; Wesgo AL995, Mykroy 750 and 1100 (ceramics) and Plexiglas (acrylic plastic). Analysis of the results of both notch tensile and bend tests on these materials indicate that fracture in ceramic materials can be explained by a maximum fracture stress concept provided that the inherent inhomogeneity of these materials is considered in the analysis. Weibull's statistical theory of fracture appears to be ap plicable to the analysis of inhomogeneity. The be havior of Plexiglas is similar to that previously observed for high strength metals. Studies of plastic flow in metallic flat notch tensile speci mens indicate that the distribution of the princi pal longitudinal strain across the notch section is related to the distribution of the longitudinal elastic stress raised to the power b, where b is primarily a function of the strain hardening ex ponent of the material. Also, Neuber's conclusion that K sub t represents the geometric mean of the true stress and true strain concentration factors in pure shear seems generally applicable to the plane stress tension case.
Author: Volker Weiss Publisher: ISBN: Category : Ceramic materials Languages : en Pages : 72
Book Description
The effects of non-uniform stress distributions on fracture strength were studied on four mate rials that exhibit brittle behavior; Wesgo AL995, Mykroy 750 and 1100 (ceramics) and Plexiglas (acrylic plastic). Analysis of the results of both notch tensile and bend tests on these materials indicate that fracture in ceramic materials can be explained by a maximum fracture stress concept provided that the inherent inhomogeneity of these materials is considered in the analysis. Weibull's statistical theory of fracture appears to be ap plicable to the analysis of inhomogeneity. The be havior of Plexiglas is similar to that previously observed for high strength metals. Studies of plastic flow in metallic flat notch tensile speci mens indicate that the distribution of the princi pal longitudinal strain across the notch section is related to the distribution of the longitudinal elastic stress raised to the power b, where b is primarily a function of the strain hardening ex ponent of the material. Also, Neuber's conclusion that K sub t represents the geometric mean of the true stress and true strain concentration factors in pure shear seems generally applicable to the plane stress tension case.
Author: Toshiro Kobayashi Publisher: Springer Science & Business Media ISBN: 4431539735 Category : Technology & Engineering Languages : en Pages : 277
Book Description
As the shift from the Metal Age progresses, materials engineers and materials scientists seek new analytical and design methods to create stronger and more reliable materials. Based on extensive research and developmental work done at the author’s multi-disciplinary material laboratory, this graduate-level and professional reference addresses the relationship between fracture mechanisms (macroscale) and the microscopic, with the goal of explaining macroscopic fracture behavior based on a microscopic fracture mechanism. A careful fusion of mechanics and materials science, this text and monograph systematically considers an array of materials, from metals through ceramics and polymers, and demonstrates lab-tested strategies to develop desirable high-temperature materials for technological applications.
Author: D.M.R. Taplin Publisher: Elsevier ISBN: 1483158179 Category : Technology & Engineering Languages : en Pages : 800
Book Description
Advances in Research on the Strength and Fracture of Materials: Volume 3Bs—Applications and Non-Metals contains the proceedings of the Fourth International Conference on Fracture, held at the University of Waterloo, Canada, in June 1977. The papers review the state of the art with respect to testing of fracture in a wide range of non-metals such as ceramics, glass, composites, polymers, biomaterials, and concrete. This volume is divided into five sections and opens by discussing the role of acoustic emission in fracture toughness testing and the relation between static and dynamic fracture toughness of structural steels. The reader is then introduced to methods for determining stress-intensity factors of simplified geometries of structural parts; stress analysis of pressure vessels by thermal shock; the fracture toughness of constructional steels in cyclic loading; and fracture processes and fracture toughness in powder forged steels. The remaining chapters explore the influence of low-cycle damage on fracture toughness; fracture of structural alloys at temperatures approaching absolute zero; fracture mechanisms in Si-Al-O-N ceramics; propagation and bifurcation of cracks in quartz; and the effect of pressure and environment on the fracture and yield of polymers. This monograph will be a useful resource for metallurgists, materials scientists, and structural and mechanical engineers.
Author: William G. Barrois Publisher: ISBN: Category : Metals Languages : en Pages : 306
Book Description
This Manual on the Fatigue of Structures presents a synthesis of knowledge drawn from many specialist areas, but is primarily intended to provide design and production engineers with a proper appreciation of the many aspects of design against fatigue. The Manual consists of the following five chapters: (1) Strength of Structures and Fatigue - General, (2) Plastic Strain in Metals, (3) Static Test of Specimens, (4) Static Strength of Notched or Cracked Components, and (5) Physical Changes and Damage during Fatigue. This Manual was prepared at the request of the Structures and Materials Panel of AGARD-NATO. (Author).
Author: Volker Weiss
Author: Volker Weiss
Author: 
Author: Defense Documentation Center (U.S.)
Author: Engineering Foundation, New York. Welding Research Council
Author: Toshiro Kobayashi
Author: 
Author: 
Author: 
Author: D.M.R. Taplin
Author: William G. Barrois