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Analysis of Autogenous Shrinkage-Induced Microcracks in Concrete From 3D Images [PDF]
Cement and Concrete Research, 2021 A new image analysis procedure for quantifying microcracks from three-dimensional (3D) X-ray microCT images of concrete is presented. The method separates microcracks from air voids and aggregates by combining filtering and morphological operations.
N R Buenfeld, H S Wong
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On sampling bones for microcracks
Bone, 2007This paper addresses the problem of designing experiments to measure microcrack density in cortical bone. Microcracks are relatively scarce in bone cross-sections, and their size requires microscope settings having small fields of view. Thus, substantial time is required to count cracks in each cross-section.
R B, Martin, O C, Yeh, D P, Fyhrie
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Microcracks in Ultrabasic Rocks Under Uniaxial Compressive Stress
Engineering Geology, 2011 The initiation and propagation of microcracks under stress are highly dependent upon the mineralogical and textural characteristics of the various lithotypes.
Konstantinos Hatzipanagiotou +2 more
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Physical Review A, 1991
We propose a phenomenological model for microcrack nucleation in a solid under constant external stress. We argue that the kinetics of the crack nucleation process is qualitatively different from that occurring in simple metastable states such as supercooled liquids or supersaturated solutions.
, Golubovic, , Feng
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We propose a phenomenological model for microcrack nucleation in a solid under constant external stress. We argue that the kinetics of the crack nucleation process is qualitatively different from that occurring in simple metastable states such as supercooled liquids or supersaturated solutions.
, Golubovic, , Feng
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The critical density of microcracks in microcrack toughening of ceramics
Journal of Materials Science Letters, 1988Recent measurements of microcrack process zones and calculations of toughening have provided convincing evidence that microcracking is a viable toughening mechanism, at least in zirconium-toughened aluminium (ZTA) and A1203-ZrO2 composite [1]. Microcracking is frequently observed to occur in two-phase ceramics [2] or in single-phase ceramics [3] with ...
Wang Chongmin, Zhe Xiaoli, Zhang Hongtu
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The extent of microcracking and the morphology of microcracks in damaged bone
Journal of Materials Science, 1994Strain-induced damage in bovine laminar bone has been examined using laser scanning confocal microscopy (LSCM). The specimens were loaded in a fluorescein solution, which penetrated the newly formed cracks in the specimen. The microcracking, and the larger cracking, induced by strain were very clearly visible.
P. Zioupos, J. D. Currey
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Modeling the impact of microcracking on the thermoelasticity of porous and microcracked ceramics
Philosophical Magazine, 2013The foundations of the Integrity Factor Model are laid down and the model is discussed. The calculation of the internal stresses in microcracked materials (as a function of temperature) is done on the basis of both the macroscopic dilation and the lattice expansion measured by diffraction.
Alexander M. Efremov, Giovanni Bruno
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Mechanics of Materials, 1990
Abstract This study examines the phenomenon of microcrack toughening under the premise that toughening must entail mutual shielding of the main crack and the microcracks. Maximum toughening corresponds to the macrocrack/microcrack configuration that minimizes the maximum energy release rate (or stress intensity factor) among the various crack tips.
David K.M. Shum, John W. Hutchinson
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Abstract This study examines the phenomenon of microcrack toughening under the premise that toughening must entail mutual shielding of the main crack and the microcracks. Maximum toughening corresponds to the macrocrack/microcrack configuration that minimizes the maximum energy release rate (or stress intensity factor) among the various crack tips.
David K.M. Shum, John W. Hutchinson
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Analysis of a Microcrack Prototype and Its Implications for Microcrack Toughening
Journal of the American Ceramic Society, 1991The stress intensity factor, the volume, and the macroscopic dilatational strain associated with microcracking for various crack lengths and elastic mismatches are examined for a microcrack prototype, which consists of a penny‐shaped crack in the center of spherical particle under residual hydrostatic tension.
Cai, Hongda, Moran, B., Faber, K. T.
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