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Tuesday, July 28, 2020 | History

2 edition of Mechanism of brittle fracture of rock. found in the catalog.

Mechanism of brittle fracture of rock.

Z. T. Bieniawski

Mechanism of brittle fracture of rock.

by Z. T. Bieniawski

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  • 20 Currently reading

Published by Council for Scientific and Industrial Research, National Mechanical Engineering Research Institute in Pretoria, South Africa .
Written in English

    Subjects:
  • Fracture mechanics.,
  • Mining engineering.,
  • Rock mechanics.

  • Edition Notes

    SeriesCSIR report -- MEG 580.
    ContributionsSouth African Council for Scientific and Industrial Research.
    The Physical Object
    Paginationxii, 226 l.
    Number of Pages226
    ID Numbers
    Open LibraryOL16606740M

    Academic Press, - Fracture mechanics - pages 0 Reviews In this work, the authors have attempted to present a concise treatment of the physics and mathematics of a representative selection of problems from areas such as earthquake mechanics and prediction, hydraulic fracturing, hot dry rock geothermal energy, and dynamic fragmentation. LECTURE NOTES; 1. Strength Profiles in the Earth. Mode, Mechanism, and Scaling of Strength: Preliminary Issues. Stress Strain Strength Profiles. 2. Constitutive Relations, Elasticity: Friction in Rocks. Friction on Rock Interfaces. Fracture Surface Energy and Elastic Solutions of Interest. Fracture Surface Energy.

    There is a macro-crack and micro-crack system in rock, which affects almost all the mechanical properties of rock, especially for the fracture mechanism. The propagation of pre-existing cracks in rock samples under load is fundamental to understanding of rock fracture mechanisms. It is evident that assumption of Griffith theory was not in accord with the fact that numerous cracks exist in by: 2. Fracture Mechanics of Concrete: Applications of Fracture Mechanics to Concrete, Rock and Other Quasi-Brittle Materials [Shah, Surendra P., Swartz, Stuart E., Ouyang, Chengsheng] on *FREE* shipping on qualifying offers. Fracture Mechanics of Concrete: Applications of Fracture Mechanics to Concrete, Rock and Other Quasi-Brittle MaterialsCited by:

    Fracture is the separation of an object or material into two or more pieces under the action of fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displacement develops perpendicular to the surface of displacement, it is called a normal tensile crack or simply a crack; if a displacement develops. Study of Fracture Mechanism of Rock Cutting p Characteristics of Energy in Circular Sawing of Natural Granite p Material Removal Mechanisms in Diamond Grinding of Granite, Part 1: The Morphological Changes of Granite from Sawing to Grinding (IUTAM) Sysmposium on Fracture of Brittle, Disordered Materials: Concrete, Rock and Cited by: 7.


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Mechanism of brittle fracture of rock by Z. T. Bieniawski Download PDF EPUB FB2

@article{osti_, title = {Mechanism of brittle fracture of rock. Parts }, author = {Bieniawski, Z T}, abstractNote = {In this study, presented in a series of 3 papers, a detailed mechanism of rock fracture in compression and tension has been propounded.

On the basis of this mechanism, it is possible to explain all the significant processes taking place in rock from initial load. Int. Rock Mech. Min. Sci. Vol. 4, pp. Pergamon Prea Ltd. Printed in Great Britain MECHANISM OF BRITTLE FRACTURE OF ROCK PART I--THEORY OF THE FRACTURE PROCESS Z.

BIENIAWSKI National Mechanical Engineering Research Institute, Pretoria, South Africa (Received 10 January ) Synopsis--This paper presents results of investigations aimed at establishing a Cited by: Mechanism of brittle fracture of rock.

Pretoria, National Mechanical Engineering Research Institute, Council for Scientific and Industrial Research, (OCoLC) Document Type: Book: All Authors / Contributors: Z T Bieniawski; South African Council for Scientific and Industrial Research. National Mechanical Engineering Research Institute.

Fracture of rocks containing a multitude of pre-existing cracks is considered from both theoretical and experimental points of view, paying attention mainly to the underlying mechanisms.

The competition between a number of mechanisms in producing tear or shear type fractures is discussed in relation to the properties of the rock and the system of pre-existing cracks on the one hand and the Cited by: Under the low-temperature and pressure conditions of Earth’s upper lithosphere, silicate rock responds to large strains by brittle fracture.

The mechanism of brittle behavior is by the propagation of cracks, which may occur on all scales. We begin by studying this form of deformation, which is fundamental to the topics that follow. MECHANISM OF BRITTLE FRACTURE OF ROCK--PART 1I The stability of mining structures may be determined on the basis of energy changes associated with the operation of making an excavation underground[12].

It is only possible, however, to understand the mechanism of failure of a rock full understanding of fracture processes in a Cited by: A review of the experimental evidence suggests that creep in brittle rock at low temperature is due to time-dependent cracking.

A transient creep law is derived from the mechanism of time. Much of the research on fracture of rocks or rock-like materials conducted over the past two decades may be considered as "academic studies" of the general phenomenon of fracture.

Yet, the understanding of this phenomenon is fundamental if a material is used in any engineering design, whether the aim is to prevent failure of the structure or to promote it.

Brittle Fracture and Toughening Mechanism in Ceramics. The predominant mechanism, responsible for the enhancement of fracture toughness in the new material, is the continuous deviation of the Author: Sheldon Wiederhorn. Introduction to Fracture Mechanics David Roylance Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, MA J Introduction ,Brittle Behavior of Engineering Structures, JohnWiley&Sons, A fracture is any separation in a geologic formation, such as a joint or a fault that divides the rock into two or more pieces.

A fracture will sometimes form a deep fissure or crevice in the rock. Fractures are commonly caused by stress exceeding the rock strength, causing the rock to lose cohesion along its weakest plane.

Fractures can provide permeability for fluid movement, such as water. This book is divided into seven chapters. Chapter 1 provides the historical background and summarizes numerous case histories of brittle fractures.

The nature of the phenomenon and factors that influence brittle fracture, including various methods of testing to determine the notch ductilities of different steels are described in Chapters 2 to 4. Purchase Fracture Mechanics of Rock - 1st Edition. Print Book & E-Book.

ISBNBook Edition: 1. MECHANISM OF BRITTLE FRACTURE OF ROCK AND ITS APPLICATIONS TO DEEP LEVEL GOLD MINING BOOK #2 Mechanism of Brittle Fracture of Rock. Doctoral Dissertation, Scientia Publications, South Africa, Pretoria, l BOOK #1 Photoelastic Coating Technique.

Masters Thesis, University Press, Johannesburg, South Africa, l Refereed Publications. Fracture Mechanics of Rock (Academic Press Geology Series) - Kindle edition by Atkinson, Barry Kean.

Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Fracture Mechanics of Rock (Academic Price: $ understanding of the basic mechanism of the fracture of rock material can be of assistance in formulating a rational behaviour pattern for rock masses.

Griffith's theory of brittle fracture3, modified by McClintock and Walsh4 to allow for the predominantly compressive stresses in.

Brittle Fracture is the sudden, very rapid cracking of equipment under stress where the material exhibited little or no evidence of ductility or plastic degradation before the fracture occurs.

Unlike most other tensile failures, where the material plastically strains under overload conditions and becomes thinner until the point of rupture, when a piece of equipment suffers a brittle fracture. Brittle fracture is one of the major concerns in Industrial Damage Mechanism and characterized by a sudden fracture in the material under stress.

Normally all materials of construction are susceptible to damage and efforts have been made to prevent failures in. The book is mainly concerned with these developments, as related to fractal descriptions of fragmentations, damage and fracture of rocks, rock burst, joint roughness, rock porosity and permeability, rock grain growth, rock and soil particles, shear slips, fluid flow through jointed rocks, faults, earthquake clustering, and so on.

Brittle Fracture DOE-HDBK/ BRITTLE FRACTURE MECHANISM BRITTLE FRACTURE MECHANISM Personnel need to understand brittle fracture.

This type of fracture occurs under specific conditions without warning and can cause major damage to plant materials. EO DEFINE the following terms: a. Ductile fracture c. Nil-ductility Transition b.

Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture.

In modern materials science, fracture mechanics is an important tool used to improve the.The assumption of linear elasticity, and hence the classical theories, fails if the hyperelastic zone shown in Fig. 1(b) becomes comparable to the local energy flux zone shown in Fig.

1(a).Brittle cleavage fracture is of the most concern in this module. Brittle cleavage fracture occurs in materials with a high strain-hardening rate and relatively low cleavage strength or great sensitivity to multi-axial stress. Many metals that are ductile under some conditions become brittle if the conditions are altered.