Journal ArticleDOI
On the formation of near-tip microcracking and associated toughening effects
TLDR
In this paper, a micromechanics model is proposed to study the formation of near-tip microcracking and consequent toughening effects, and analytical expressions are derived for the microcrack density distribution and the size and shape of the micro-cracking zone.About:
This article is published in Engineering Fracture Mechanics.The article was published on 1995-01-01. It has received 20 citations till now.read more
Citations
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Journal ArticleDOI
Crack growth criteria incorporating non-singular stresses: size effect in apparent fracture toughness
TL;DR: In this paper, simple criteria accounting for the non-singular stresses at the crack tip are considered, based on the comparison of the local stress concentration with the material microstrength, and it is shown that when the load can be resolved into a superposition of elementary loads, the size effect can asymptotically be presented as a weighted sum of the elementary size effects (i.e. the size effects associated with the elementary loads).
Journal ArticleDOI
Stress field interaction and strain energy distribution between a stationary main crack and its process zone
A. Brencich,Alberto Carpinteri +1 more
TL;DR: In this article, the damage process zone developed by brittle materials in front of a macro-crack is simulated by means of a distribution of micro-cracks, and the main features of the interaction phenomena turn out to be almost independent of the microcrack density.
Journal ArticleDOI
Hybrid crack-tip element and its applications
TL;DR: In this paper, a hybrid crack-tip element with a distribution of traction along the crack surfaces is developed, where linear superposition and approximate functions based on the linear elasticity theory are employed in the formulation.
Journal ArticleDOI
Elastic and elastic–plastic singular fields around a crack-tip in particulate-reinforced composites with progressive debonding damage
Keiichiro Tohgo,Takanori Itoh +1 more
TL;DR: In this article, the elastic and elastic-plastic singular fields around a crack-tip in particulate-reinforced composites with debonding damage of particle-matrix interface were analyzed.
Journal ArticleDOI
Effects of dislocation pile-up and nanocracks on the main crack propagation in crystalline metals under uniaxial tensile load
Xiaotao Li,Xiaoyu Jiang +1 more
TL;DR: In this paper, the authors investigated the interaction between the main crack propagation and micro-defects (i.e., dislocations, grain boundaries and nanocracks) under uniaxial tensile load theoretically.
References
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Journal ArticleDOI
Elastic solids with many cracks: A simple method of analysis
TL;DR: In this paper, a simple method of stress analysis in elastic solids with many cracks is proposed, based on the superposition technique and the ideas of self-consistency applied to the average tractions on individual cracks.
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Crack‐Growth Resistance of Microcracking Brittle Materials
TL;DR: In this article, a mechanics model of micro-crack toughening is presented, which predicts the magnitude of microcracks as well as the existence of R-curve effects.
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Crack tip shielding by micro-cracking in brittle solids
TL;DR: In this article, the effect of profuse micro-cracking at the tip of a macroscopic crack is studied with emphasis on the reduction in stress intensity, or shielding, within the microcrack region.
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Microcrack coalescence and macroscopic crack growth initiation in brittle solids
TL;DR: In this paper, the effect of microcracks on crack growth initiation in brittle solids was investigated with a view to determining the range of dominance of each mechanism, and the extent of shielding of the crack tip by the intervening micro-cracks was estimated under isotropic damage conditions.
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Microcrack toughening in alumina/zirconia
TL;DR: In this article, an analysis of microcrack toughening in Al 2 O 3 ZrO 2 is presented, which consists of experimental measurements of the microcracks parameters that dictate the predicted level of toughness, as well as calculations of the toughness using micro-crack models based on the micro cracks observed in the process zone.