Ductile Fracture Of Metals

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Author: P. F. Thomason
Publisher: Pergamon
ISBN: 9780080401782
Size: 55.58 MB
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Ductile Fracture Of Metals by P. F. Thomason

Original Title: Ductile Fracture Of Metals

The book provides a clear and concise account of the recent developments in research into ductile fracture in metals and alloys. Aspects covered include localized fracture at the root of notches and sharp cracks, and fracture in bulk plastic-deformation processes of the metal and metal forming type. It also discusses various theoretical models in depth, detailing conceptual errors and weaknesses. Overall the book provides a complete presentation of the current understanding of the mechanics and physics of ductile fracture processes. It serves as a valuable text for final year undergraduates, post-graduates, academics, research scientists and engineers who have a working knowledge of basic plasticity theory and of the metallurgy of engineering alloys.

Micromechanism Of Cleavage Fracture Of Metals

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Author: Jianhong Chen
Publisher: Butterworth-Heinemann
ISBN: 0128010517
Size: 53.74 MB
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Micromechanism Of Cleavage Fracture Of Metals by Jianhong Chen

Original Title: Micromechanism Of Cleavage Fracture Of Metals

In this book the authors focus on the description of the physical nature of cleavage fracture to offer scientists, engineers and students a comprehensive physical model which vividly describes the cleavage microcracking processes operating on the local (microscopic) scale ahead of a defect. The descriptions of the critical event and the criteria for cleavage fracture will instruct readers in how to control the cleavage processes and optimize microstructure to improve fracture toughness of metallic materials. Physical (mechanical) processes of cleavage fracture operating on the local (microscopic) scale, with the focus on the crack nucleation and crack propagation across the particle/grain and grain/grain boundaries Critical event, i.e., the stage of greatest difficulty in forming the microcrack, which controls the cleavage fracture Criteria triggering the cleavage microcracking with incorporation of the actions of macroscopic loading environment into the physical model Effects of microstructure on the cleavage fracture, including the effects of grain size, second phase particles and boundary Comprehensive description of the brittle fracture emerging in TiAl alloys and TiNi memory alloys

A Summary Of The Theory Of Fracture In Metals

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Size: 55.93 MB
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A Summary Of The Theory Of Fracture In Metals by

Original Title: A Summary Of The Theory Of Fracture In Metals

The theoretical strength of metals, bas d on atomic forces, is in the order of 100 to 1000 greater than that observed. Reasons for this discrepancy are discussed in detail, but the more important ones are (1) lattice imperfections, (2) the fact th t real metals ar polycrystalline aggregates, (3) crystalline anisotropy, and (4) the ability of metals to deform by shear. Plastic flow, particularly heterogeneous plastic flow, is intimately associated with crack initiation. The precise conditions under which plastic flow c ase and bond rupturing (cracking begins are not completely understood. The body-centered cubic lattice has geometric characteristics that make it particularly susceptible to fracture with little or no preceding plastic flow. Multidirectional stress fields, both microscopic and macroscopic, affect the degree of plastic deformation that precedes crack initiation. The theory of fracture as it exists oday is reviewed. (Author).

Fracture Of Metals

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Author: H. Liebowitz
Publisher: Elsevier
ISBN: 1483273202
Size: 27.94 MB
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Fracture Of Metals by H. Liebowitz

Original Title: Fracture Of Metals

Fracture of Metals is part of a multivolume treatise that brings together the fundamentals for critical evaluation of the different theories and experimental findings on brittle fracture. These results, together with their design implications, should be made available to professional engineers, students, and researchers in industrial organizations, educational and research institutions, and various governmental agencies. Seven major areas are covered in this treatise on fracture. They are: (1) microscopic and macroscopic fundamentals of fracture; (2) mathematical fundamentals of fracture; (3) engineering fundamentals of fracture and environmental effects; (4) engineering fracture design; (5) fracture design of structures; (6) fracture of metals; and (7) fracture of nonmetals and composites. The present volume focuses on the fracture of metals. The book opens with chapter on the influence of alloying elements on fracture behavior in metallic systems of the three common crystal structures: face-centered cubic, body-centered cubic, and hexagonal close packed. Separate chapters follow on the principal microstructural factors which seem to be important for fracture toughness; the nature of the fracture processes occurring in high-strength materials; and the state of knowledge on fracture toughness of structural steels. Subsequent chapters deal with the strength and toughness of hot-rolled, ferrite-pearlite steels; fracture behavior of aluminum and its alloys; and fracture phenomena associated with electrical effects.

Chevron Notch Fracture Test Experience

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Author: Kevin R. Brown
Publisher: ASTM International
ISBN: 9780803114807
Size: 33.37 MB
Format: PDF
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Chevron Notch Fracture Test Experience by Kevin R. Brown

Original Title: Chevron Notch Fracture Test Experience

Reviews the latest information and experimentation on the fracture-toughness testing of materials using specimens that are chevron notched, a procedure that has been an ASTM standard only since December 1989. The 13 papers were presented at a symposium in Indianapolis, May 1991; they include studies

Fracture Mechanics Of Metals Composites Welds And Bolted Joints

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Author: Bahram Farahmand
Publisher: Springer Science & Business Media
ISBN: 9780792372394
Size: 45.89 MB
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Fracture Mechanics Of Metals Composites Welds And Bolted Joints by Bahram Farahmand

Original Title: Fracture Mechanics Of Metals Composites Welds And Bolted Joints

This book was written to serve as both a professional's overview of the entire field of fatigue and fracture mechanics as it is currently practiced, and as an introduction to the application of the Fracture Mechanics of Ductile Metals (FMDM) theory. Particular benefits include: Application of fracture mechanics concepts to metallic structure, composites, welds and bolted joints. Extensive discussion of two welding techniques currently used in aerospace and aircraft structure, with emphasis given to state-of-the-art friction stir welding techniques. Life assessment of welded and bolted joints, with example problems. Damage tolerance and durability assessment of composites, not found in any other book published in this area. Presentation of Elastic-Plastic Fracture Mechanics (EPFM). Application of multi-specimen and single-specimen techniques to obtain fracture properties. Introduction to Fracture Mechanics of Ductile Metals (FMDM) theory to determine residual strength capability of structural metals. Discussion of techniques to determine the material fracture toughness properties without the need for laboratory testing. This is the first single text to present applications of fatigue and fracture mechanics to metals and composites and also include practical applications and example problems. It will be an essential reference for researchers, practitioners, and students alike.

Local Approach To Fracture

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Author: Jacques Besson
Publisher: Presses des MINES
ISBN: 291176255X
Size: 65.61 MB
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Local Approach To Fracture by Jacques Besson

Original Title: Local Approach To Fracture

Models allowing the prediction of the failure of structures by crack propagation were first introduced in the 50's using linear fracture mechanics whose principles were first proposed by Griffith (1920). This approach was extended to non linear cases (plasticity and viscoplasticity) in the 70's based on the work of Rice (J or C* integrals) ; it has been largely adopted by the industry. However this so called global approach cannot deal with ail practical cases and cannot explain all experimental observations as, for instance, the warm pre-stress effect (WPS). The local approach to fracture, which relies on a fine analysis of strains, stresses and damage of highly solicited regions (cracks, notches...) of structures is an alternative which allows to solve problems encountered while applying the global approach. It has been developped since the 80's in particular in France. Important reseach efforts are currently undertaken in this field in Europe (France, Germany), United States and Japan. This book presents several aspects of the local approach to fracture : damage mechanisms, experimental techniques, damage evolution law and failure criteria, modelling of damage, numerical simulation. This work is the result of a collective work carried out by the best french specialists (École des Mines de Paris, École Centrale Paris, ENS Cachan, Université de Louvain, INSA Lyon, ONERA, EDF).

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