microcrack


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microcrack

(ˈmaɪkrəʊˌkræk)
n
a microscopic crack in a material
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Once a microcrack occurs in tensile experiments in brittle rocks, the crack will propagate unstably [16], which shows that the rock tensile testing results agree with the fracture characteristics in shale hydraulic fracturing.
Byerlee, "The effect of microcrack dilatancy on the permeability of Westerly granite," Journal of Geophysical Research, vol.
And, they found that the deformation and failure behavior were affected by joint degradation, the microcrack formation in the intact rock, the interaction between two joints, and the interactions of microcracks and joints.
According to the inactive area of the cell, the number of microcracked cells, and the impact on the output power of modules, microcracks can be divided into three categories: microscopic microcrack, general microcrack, and serious microcrack.
The cross-sectional area A can be divided into three parts: undamaged area [A.sub.ud], unhealed microcrack area [A.sub.uh], and healed microcrack area [A.sub.h], and
The finite element method (FEM) is also widely used to solve the microvoid and microcrack problems in some practical structures.
As shown in Figure 6(a), the stress-strain curves of coal specimens in the compression test under the PSBSS can be divided into four typical stages, namely, (1) original microcrack closure stage, (2) elastic deformation stage, (3) strain-softening stage, and (4) residual stage.
A number of research works have been devoted to the problems of viscous fluid motion in the cracks [1-4] but the obtained results are not sufficient for explanation of the manifestation causes of the anomalous hydrodynamic behavior of fluids in the microcrack.
They cover vectors and tensors; spherical and ellipsoid inclusion and inhomogeneity; volume integrals and averages in inclusion and inhomogeneity problems; homogenization for effective elasticity based on the energy, vectoral, and perturbation methods; defects in materials: void, microcrack, dislocation, and damage; and boundary effects on particulate composites.
The number of microcrack was increased from about half of yield stress and it was rapidly increased around the yield point.
A crack will not spontaneously grow, but if you add a deforming stress and then repeat that stress, each load cvcle will give a microcrack or a nick a chance to grow.
Specific topics include transport by pulsatile flow in a branching network of cerebral vasculature, psychophysiological determinants of a driver's condition, particle motion in coronary serial stenosis, simulating microcrack growth and repair in living bone, an intelligent corset, and image segmentation methods for intracranial aneurysm hemodynamics research.