Results 261 to 270 of about 71,955 (280)

Instability and Spacing of Cooling or Shrinkage Cracks

Journal of the Engineering Mechanics Division, 1979
When a system of parallel equidistant cooling crack propagates into halfspace, it reaches at a certain depth a critical state at which the growth of every other crack is arrested. Later these cracks reach a second critical state at which they close. The intermediate cracks, at doubled spacing, open about twice as wide and advance further as cooling ...
Zdeněk P. Bažant, Abu bakr A. Wahab
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Crack normal to layered elastic periodically stratified space

Theoretical and Applied Fracture Mechanics, 2008
Abstract The paper deals with the plane problem of stress distribution near crack tips in an elastic periodically stratified space. The crack is normal to the layering in a two-constituent laminated composite. The lower and upper crack surfaces are loaded symmetrically by arbitrary normal loads. The problem is approximated using the homogenized model
S.J. Matysiak, D.M. Perkowski
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An elliptic crack in an elastic half-space

International Journal of Engineering Science, 1992
We consider the effect of the free surface on the stress distribution of an elliptic crack aligned parallel to the free boundary and at a depth \(h\) below it. The title problem is posed as a dual integral equation in Cartesian coordinate system. By suitable transformation the dual integral equation is first reduced to an infinite system of dual ...
Roy, A., Chatterjee, M.
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Subharmonic Phased Array for Crack Evaluation (SPACE)

2018
Crack depth is one of the important factors determining material strength. Hence, the accurate measurement of crack depth is essential to ensure the reliability of aged structures and manufactured products. If cracks are open, crack depth can be measured by ultrasonics because ultrasound is strongly scattered by the crack tip (Fig. 10.1a) [1]. However,
Yoshikazu Ohara, Tsuyoshi Mihara, Kazushi Yamanaka   +2 more
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Using Surface Crack Spacing to Predict Crack Network Geometry in Swelling Soils

Soil Science Society of America Journal, 2000
Prediction of the geometrical characteristics of steady crack networks in swelling soils is possible using a previously published model based on concepts of multiple cracking and fragmentation. Applications of the model require estimation of the model parameters: the thickness of the upper intensive‐cracking layer,
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Interface tunnel cracks in a composite anisotropic space

Journal of Applied Mathematics and Mechanics, 2008
Exact solutions of the problem of tunnel cracks in the plane between two anisotropic half-spaces which are in conditions of generalized plane deformation (without the presence of planes of elastic symmetry) are obtained. Using the proposed procedure, which rests on constructed solutions of the Riemann matrix problem in the space of generalized ...
A.F. Krivoi, G.Ya. Popov
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Crack Spacing in Brittle Films on Elastic Substrates

Journal of the American Ceramic Society, 1990
An approximate, analytical solution is derived for the minimum spacing that can exist between a series of parallel cracks propagating in a thin film. The analysis is pertinent to the specific case of a film and substrate having identical elastic properties. In the absence of plasticity, only three parameters govern the minimum crack spacing. The cracks
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Cracking in a loaded, brittle elastic half-space

International Journal of Solids and Structures, 1992
Abstract An approximation giving the relation between the applied load and the crack density in a microscratch test is presented from considerations of sliding contact and fracture analysis. First, the three-dimensional problem of two interacting cracks, with arbitrary shape and configuration, in an elastic half-space is analyzed using the body force
L.M. Keer, C.H. Kuo
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Mean crack spacing modelling for RC tension elements

Engineering Structures, 2017
Abstract An approach for predicting the crack spacing of reinforced concrete tension elements is presented in this paper. Two well established methods, the mean strain and the stress transfer approaches (partial interaction) are combined through a newly proposed strain compliance principle.
Gintaris Kaklauskas, Regimantas Ramanauskas, Ronaldas Jakubovskis   +2 more
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Interface crack in the inhomogeneous transversely isotropic space

Materials Science, 2012
We construct the exact solution of the problem of circular interface crack in an inhomogeneous transversely isotropic space under the action of arbitrary loads applied to the crack lips. The formulas for the stress intensity factors on the boundary of the crack and the values of these factors for some combinations of transversely isotropic materials ...
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