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Imaging of Micro-Cracks by Photo-Displacement Microscopy
IEEE 1984 Ultrasonics Symposium, 1984Thermal waves are generated using a modulated conductor laser as the heat source. The resulting disturbance is sensed, by means of a HeNe laser probe, which detects the vertical displacement of the surface. The probing laser spot can be coincident with that of the thermal wave generating laser.
Y. Martin, E.A. Ash
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Fractal Study for Micro-Crack of Mud-Shale
Key Engineering Materials, 2016The structure, distribution and evolution of micro-crack within the mud-shale are studied in this paper. The micro-fracture behavior of mud-shale has fractal characteristics. Fractal method is used to quantitative description of the damage evolution behavior of the mud-shale.
Ping Wang, Zhan Qu, Ying Cui
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Nanoscale experimental study of a micro-crack in silicon
Physica B: Condensed Matter, 2008Abstract A micro-crack in silicon was experimentally investigated using high-resolution transmission electron microscopy (HRTEM). The crystal lattice structure of a micro-crack was carefully observed at a HRTEM image scale of approximately 18 nm. The crystal lattice structure of the crack tip region was observed to be regular with good periodicity ...
C.W. Zhao, Y.M. Xing
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Temperature-dependent micro crack healing process
Metals and Materials, 1998The crack healing process is studied theoretically on the basis of the extended the Thomson-Obreimoff model. The system free-energy F as a function of the crack lengthl and temperatureT is calculated using the self-consistent Einstein model. It is found that with the temperature increase, the energy barrier becomes lower and even disappears at the ...
Kazuhiro Kitamura +2 more
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A semi-empirical analysis of micro-cracking in concrete
Engineering Fracture Mechanics, 1990Abstract This paper presents the results of an analysis which considers the interaction between a crack and an array of microcracks. Complex variable techniques are used to derive explicit expressions for the stress intensity factors and energy release rates which arise from the interaction beween a finite length crack and a dislocation dipole ...
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Micro-crack toughening in particulate composites
International Journal of Fracture, 1991Anil Misra, A. A. Sukere
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Study on the evolution and model of rock micro-cracks
Arabian Journal of Geosciences, 2022Xiangdong Zhang +2 more
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