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Crack Tip Plasticity in Dynamic Fracture Mechanics

Crack Tip Plasticity in Dynamic Fracture Mechanics
Author: J. D. Achenbach
Publisher:
Total Pages: 25
Release: 1978
Genre:
ISBN:

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The objective of this work is to develop a procedure by which crack tip plasticity can be taken directly into account in rapid crack propagation. To set the stage, a background description of linear elastic dynamic fracture mechanics is first given. Existing solutions for dynamic crack propagation and for quasistatic crack growth accompanied by crack tip plasticity are reviewed. It is found that existing dynamic plastic fracture solutions are essentially confined to strip yield (Dugdale model) plastic zones that are collinear with the crack. The ultimate goal of the research reported in this paper is to provide the basis of a computational procedure for plastic dynamic crack propagation in structures of engineering interest. The prerequisite for such a development is knowledge of the nature of the crack tip singularity, which can be obtained via an asymptotic analysis in which attention is focused on the very near crack tip region. Here we have considered the specific case of crack propagation in antiplane strain (Mode III). The results suggest some interesting general conclusions, and the analysis has pointed the way to the solution of the Mode I problem.


Dynamic Fracture Mechanics

Dynamic Fracture Mechanics
Author: L. B. Freund
Publisher: Cambridge University Press
Total Pages: 592
Release: 1998-03-28
Genre: Mathematics
ISBN: 9780521629225

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This volume focuses on the development and analysis of mathematical models of fracture phenomena.


Dynamic Fracture Mechanics

Dynamic Fracture Mechanics
Author: Arun Shukla
Publisher: World Scientific
Total Pages: 374
Release: 2006
Genre: Technology & Engineering
ISBN: 9812773320

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Covering a wide variety of topics in dynamic fracture mechanics, this volume presents state-of-the-art experimental techniques and theoretical analysis on dynamic fracture in standard and exotic materials. Written by world renowned researchers, this valuable compendium contains eleven chapters on crack initiation, crack propagation, crack arrest, crack-stress wave interactions, and experimental, analytical and numerical methods in dynamic fracture mechanics. Contents: Modeling Dynamic Fracture Using Large-Scale Atomistic Simulations (H-J Gao & M J Buehler); Dynamic Crack Initiation Toughness (D Rittel); The Dynamics of Rapidly Moving Tensile Cracks in Brittle Amorphous Material (J Fineberg); Optical Methods for Dynamic Fracture Mechanics (H V Tippur); On the Use of Strain Gages in Dynamic Fracture (V Parameswaran & A Shukla); Dynamic and Crack Arrest Fracture Toughness (R E Link & R Chona); Dynamic Fracture in Graded Materials (A Shukla & N Jain); Dynamic Fracture Initiation Toughness at Elevated Temperatures with Application to the New Generation of Titanium Aluminides Alloys (M Shazly et al.); Dynamic Fracture of Nanocomposite Materials (A Shukla et al.). Readership: Researchers, practitioners, and graduate students in fracture mechanics and materials science.


Results on the Influence of Crack-Tip Plasticity During Dynamic Crack Growth

Results on the Influence of Crack-Tip Plasticity During Dynamic Crack Growth
Author: LB. Freund
Publisher:
Total Pages: 14
Release: 1989
Genre: Crack arrest
ISBN:

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Dynamic fracture processes in structural materials are often described in terms of the relationship between a measure of the crack driving force and the crack-tip speed. In this paper, ongoing research directed toward establishing a basis for such a relationship in terms of crack-tip plastic fields is described. In particular, the role of material inertia on a small scale as it influences the perceived fracture resistance of a rate-independent material is discussed. Also, the influence of material strain rate sensitivity on the development of crack-tip plastic deformations, and the implications for cleavage propagation and arrest in a material that can undergo a fracture mechanism transition is considered. The discussion is concluded with mention of a few outstanding problems in the study of dynamic fracture, including some recent experimental evidence that the traditional crack-tip characterization viewpoint of fracture mechanics may be inadequate under very high rate loading conditions.


Results on the Influence of Crack Tip Plasticity During Dynamic Crack Growth

Results on the Influence of Crack Tip Plasticity During Dynamic Crack Growth
Author: L. B. Freund
Publisher:
Total Pages: 32
Release: 1987
Genre:
ISBN:

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Dynamic fracture processes in structural materials are often described in terms of the relationship between a measure of the crack driving force and the crack tip speed. In this article, ongoing research directed toward establishing a basis for such a relationship in terms of crack tip plastic fields is described. In particular, the role of material inertia on a small scale as it influences the perceived fracture resistance of a rate independent material is discussed. Also, the influence of material strain rate sensitivity on the development of crack tip plastic deformations, and the implications for cleavage propagation and arrest in a material that can undergo a fracture mechanism transition, is considered. The discussion is concluded with mention of a few outstanding problems in the study of dynamic fracture, including some recent experimental evidence that the traditional crack tip characterization viewpoint of fracture mechanics may be inadequate under very high rate loading conditions. Keywords: Dynamic fracture, Dynamic crack propagation, Elastic-plastic fracture, High strain rate fracture, Crack arrest.


Mechanics of Elastic-plastic Fracture

Mechanics of Elastic-plastic Fracture
Author: Vladimir Zalmanovich Parton
Publisher: Core/Mechanical
Total Pages: 352
Release: 1989
Genre: Science
ISBN: 9780891166061

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Mechanics of Crack Growth

Mechanics of Crack Growth
Author: J. R. Rice
Publisher: ASTM International
Total Pages: 516
Release: 1976
Genre: Technology & Engineering
ISBN: 9780803105096

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Fracture Mechanics for Modern Engineering Design

Fracture Mechanics for Modern Engineering Design
Author: K. R. Y. Simha
Publisher: Universities Press
Total Pages: 204
Release: 2001-11
Genre: Fracture mechanics
ISBN: 9788173712593

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Fracture is a natural reaction of solids to relieve stress and shed excess energy. The fragility of solids is a constant threat to our survival as we drive over a bridge, go through a tunnel, or even inside a building. This book weaves together the essential concepts underlying fracture mechanics.


Fast Fracture and Crack Arrest

Fast Fracture and Crack Arrest
Author: George T. Hahn
Publisher: ASTM International
Total Pages: 423
Release: 1977
Genre: Metals
ISBN:

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