On the Griffith-Irwin Fracture Theory

1960 ◽  
Vol 27 (2) ◽  
pp. 352-353 ◽  
Author(s):  
J. L. Sanders
Keyword(s):  
Fracture Theory

scholarly journals Brittle Fracture Theory Describes the Onset of Frictional Motion

2019 ◽  
Vol 10 (1) ◽  
pp. 253-273 ◽  
Author(s):  
Ilya Svetlizky ◽  
Elsa Bayart ◽  
Jay Fineberg
Keyword(s):  
Friction Coefficient ◽  
Brittle Fracture ◽  
Static Friction ◽  
Quantitative Agreement ◽  
Interface Fracture ◽  
Earthquake Dynamics ◽  
Rupture Dynamics ◽  
Static Friction Coefficient ◽  
Fracture Theory ◽  
Macroscopic Motion

Contacting bodies subjected to sufficiently large applied shear will undergo frictional sliding. The onset of this motion is mediated by dynamically propagating fronts, akin to earthquakes, that rupture the discrete contacts that form the interface separating the bodies. Macroscopic motion commences only after these ruptures have traversed the entire interface. Comparison of measured rupture dynamics with the detailed predictions of fracture mechanics reveals that the propagation dynamics, dissipative properties, radiation, and arrest of these “laboratory earthquakes” are in excellent quantitative agreement with the predictions of the theory of brittle fracture. Thus, interface fracture replaces the idea of a characteristic static friction coefficient as a description of the onset of friction. This fracture-based description of friction additionally provides a fundamental description of earthquake dynamics and arrest.

scholarly journals ON THE BRITTLE FRACTURE THEORY BY YA. FRENKEL AND A. GRIFFITH

2017 ◽  
Vol 18 (3) ◽  
pp. 381-393
Author(s):  
Viktor Michajlovich Markochev ◽  
Mikhail Ivanovich Alymov
Keyword(s):  
Brittle Fracture ◽  
Fracture Theory

Fundamental Analysis of the New Version of the New Proposed Fracture Theory

2005 ◽  
Vol 502 ◽  
pp. 87-94 ◽  
Author(s):  
Refat Ahmed Elshikhy
Keyword(s):  
Physical Meaning ◽  
Brittle Materials ◽  
Current Theory ◽  
Fundamental Analysis ◽  
Ductile Materials ◽  
Detailed Explanation ◽  
New Concepts ◽  
Unified View ◽  
Fracture Theory ◽  
Cracking Process

New version of new proposed fracture theory called N-N was introduced as concepts and hypotheses. In this research analytical discussions and applications in addition to detailed explanation of physical meaning and conceptual formation of is introduced. The current theory depends mainly on energy approach in LEFM for isotropic brittle materials and can be applied for ductile materials and composites regarding their different properties. This theory represents an extension of the continued efforts to obtain a unified view for all ideas and proposals of the majority of the researchers in the field of development of the fracture theories to predict the mechanism and mechanical aspects of cracking process. Fundamental new concepts and analytical hypotheses are introduced.

Advances in Three-Dimensional Fracture Mechanics

2006 ◽  
Vol 312 ◽  
pp. 27-34 ◽  
Author(s):  
Wan Lin Guo ◽  
Chongmin She ◽  
Jun Hua Zhao ◽  
Bin Zhang
Keyword(s):  
Fracture Mechanics ◽  
Deformation Theory ◽  
Three Dimensional ◽  
Unified Theory ◽  
Constraint Factor ◽  
Engineering Structures ◽  
The Past ◽  
Fatigue And Fracture ◽  
Fracture Theory ◽  
Historical Developments

The historical developments of the fracture mechanics from planar theory to threedimensional (3D) theory are reviewed. The two-dimensional (2D) theories of fracture mechanics have been developed perfectly in the past 80 years, and are suitable for some specific cases of engineering applications. However, in the complicated 3D world, the limitation of the 2D fracture theory has become evident with development of the structure toward complication and micromation. In the 1990’s, Guo has proposed the 3D fracture theory with a 3D constraint factor based on the deformation theory and energy theory. The proposed 3D theory can predict accurately the fracture problems for practical and complicated engineering structures with defects, by integrating the 3D theory of fatigue, which has been developed to unify fatigue and fracture. Our efforts to develop the 3D fracture mechanics and the unified theory of 3D fatigue and fracture are summarized, and perspectives for future efforts are outlined.

The Rosette, Star, Tensile Fracture

1968 ◽  
Vol 90 (1) ◽  
pp. 21-27 ◽  
Author(s):  
W. R. Clough ◽  
R. M. Vennett ◽  
R. J. Hrubec
Keyword(s):  
Electron Microscope ◽  
Tensile Testing ◽  
Tensile Fracture ◽  
Fracture Modes ◽  
Fracture Topography ◽  
Fracture Configuration ◽  
Temperature Ranges ◽  
Fracture Theory ◽  
Quenched And Tempered Steel ◽  
Tempered Steel

A type of tensile fracture topography encountered fairly often in certain temperature ranges with specimens from forgings, billets, rod, and bar of quenched and tempered steel, is the “star” or “rosette.” Having available several steels which had been shown to be capable of exhibiting the rosette, star, fracture, tensile testing was done to establish the temperature ranges for which this fracture configuration was applicable. Explanations of the fracture, and determinations of the fracture modes, were sought through experimentation involving metallography and the electron microscope, and by application of continuum mathematical plasticity-fracture theory.

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