Journal ArticleDOI
Comparison of the criteria for mixed mode brittle fracture based on the preinstability stress-strain field Part I: Slit and elliptical cracks under uniaxial tensile loading
Surjya Kumar Maiti,R. A. Smith +1 more
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In this article, the authors proposed a new approach based on maximum tangential principal stress (MTPS) to predict the angle of crack extension, critical load and unstable crack paths.Abstract:
Predictions for the angle of crack extension, critical load and unstable crack paths based on the criteria of maximum tangential stress (MTS), maximum tangential strain (MTSN) and strain energy density (SED) for angled slit and elliptical cracks under uniaxial tensile loading are compared. The tangential stress associated with the MTS criterion need not be a principal stress and a new approach to this criterion is suggested. A criterion based on maximum tangential principal stress (MTPS) is proposed. Predictions by these two criteria are compared. Some difficulties associated with the application of the SED criterion are indicated. A new basis, which permits a unification of all the criteria in respect of prediction of critical load, is suggested. Some of the results have been compared with data available in the literature.read more
Citations
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Journal ArticleDOI
The initiation of secondary cracks in compression
TL;DR: In this paper, an extension of the maximum tangential stress criterion is proposed in which shear crack initiation is analogous to tensile crack initiation, except that the direction and stress level of initiation are determined by the direction of and magnitude of maximum shear stress.
Journal ArticleDOI
Fracture testing of a soft rock with semi-circular specimens under three-point bending. Part 2—mixed-mode
TL;DR: In this article, a semi-circular specimen under three-point bending (SCB) technique was employed to determine the Mode I fracture toughness of a water-saturated synthetic mudstone.
Journal ArticleDOI
The fracture behaviour of PMMA in mixed modes I and II
T.M. Maccagno,John F. Knott +1 more
TL;DR: In this paper, the brittle fracture behaviour of PMMA under mixed mode I/II loading has been investigated using pre-cracked bend bar specimens loaded in antisymmetric and symmetric four point loading.
Journal ArticleDOI
Analysis of mixed mode crack initiation angles under various loading conditions
TL;DR: In this paper, a detailed analysis of mixed mode I-II crack initiation angles under different loading conditions is presented using different criteria, including the maximum tangential stress criterion (MTS), which was originally proposed originally for brittle materials, is modified such that it can be used for ductile materials.
Journal ArticleDOI
A review of fatigue crack growth in steels under mixed mode i and ii loading
TL;DR: In this article, a review of the available models and experimental studies in the literature on mixed mode I and II loading, and the parameters that affect the mode of crack growth are discussed.
References
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Journal ArticleDOI
On the Crack Extension in Plates Under Plane Loading and Transverse Shear
Fazil Erdogan,G.C. Sih +1 more
Journal ArticleDOI
On the Stress Distribution at the Base of a Stationary Crack
TL;DR: In this article, it was shown that at the base of the crack in the direction of its prolongation, the principal stresses are equal, thus tending toward a two-dimensional (two-dimensional) hydrostatic tension.
Journal ArticleDOI
Slightly curved or kinked cracks
Brian Cotterell,James R. Rice +1 more
TL;DR: In this paper, a solution for the elastic stress intensity factors at the tip of a slightly curved or kinked two-dimensional crack is presented for the deviation of the crack surface from a straight line and is carried out by perturbation procedures analogous to those of Banichuk [1] and Goldstein and Salganik [2, 3].
Book ChapterDOI
Mechanics of Fracture
TL;DR: In this article, the theoretical strength of crystalline solids is derived based on idealised forms of atomic force-displacement curves, in which the force is defined as the differential with respect to distance of the interatomic or inter-ionic energy.
Journal ArticleDOI
Some basic problems in fracture mechanics and new concepts
TL;DR: In this paper, the authors re-examine some of the fundamental concepts of the classical theory of fracture and discuss the numerous inconsistencies and misconceptions that have not received attention, and apply the modified Griffith theory for ductile material.
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