Results 211 to 220 of about 23,328 (266)

Three‐dimensional liquid transport in concrete cracks

International Journal for Numerical and Analytical Methods in Geomechanics, 2004
AbstractCracks in concrete are measured in 3D by microfocus X‐ray computer tomography. The tomographic images are thresholded matching a characteristic of the measured crack attenuation profile. A methodology is proposed to convert the 3D measured voxel data into a network of parallel plates.
Carmeliet, J., Delerue, J.F., Vandersteen, K., Roels, S.   +3 more
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Three‐dimensional analysis of thermally loaded cracks

International Journal for Numerical Methods in Engineering, 1993
AbstractThe stress intensity factors for cracks in three‐dimensional, thermally stressed structures are computed by using the boundary element method. While many boundary and volume‐integral‐based formulations are available for the treatment of thermoelastic problems in solids, the present analysis is based on a recently developed boundary‐only ...
Raveendra, S. T., Banerjee, P. K., Dargush, G. F.   +2 more
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Three-Dimensional Analysis of Laminates With Cross Cracks

Journal of Applied Mechanics, 1988
An approximate 3-dimensional analysis to study the effects of a system of transverse and longitudinal matrix cracks in cross-ply laminates is given. The method considers a repeating unit cell containing three subcells in every one of which the displacement vector is expanded to second order.
Aboudi, J., Lee, Shi-Wei Ricky, Herakovich, C.T.   +2 more
openaire   +3 more sources

Three-Dimensional Slightly Nonplanar Cracks

Journal of Applied Mechanics, 1992
Abstract Three-dimensional slightly nonplanar cracks are studied via a perturbation method valid to the first-order accuracy in the deviation of the crack shape from a perfectly planar reference crack. The Bueckner-Rice crack-face weight functions are used in the perturbation analysis to establish a relationship, within first-order ...
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Three-Dimensional Analysis of Cracking in a Multilayered Composite

Journal of Applied Mechanics, 1995
The three-dimensional problem of a multilayered composite containing an arbitrarily oriented crack is considered in this paper. The crack problem is analyzed by the equivalent body force method, which reduces the problem to a set of singular integral equations.
Kuo, C. H., Keer, L. M.
openaire   +1 more source

On the Three-Dimensional Theory of Cracked Plates

Journal of Applied Mechanics, 1975
This paper discusses a method for solving three-dimensional mixed-boundary-value problems which arise in elastostatics. Specifically, the method is applied to a plate of finite thickness which contains a finite, through the thickness, line crack. The analysis shows that (a) in the interior of the plate only the stresses σx, σy, σz, τxy are singular of ...
openaire   +1 more source

Analysis of Three-Dimensional Cracks with Independent Crack Mesh

Solid State Phenomena, 2006
In order to simulate the growth of arbitrarily shaped three-dimensional cracks, the finite element alternating method is extended. As the required solution for a crack in an infinite body, the symmetric Galerkin boundary element method formulated by Li and Mear is used.
Tae Soon Kim, Jai Hak Park, June Soo Park, Jong Sung Kim, Tae Eun Jin   +4 more
openaire   +1 more source

Boundary elements for three‐dimensional elastic crack analysis

International Journal for Numerical Methods in Engineering, 1987
AbstractIn this paper 8‐node traction singular boundary elements are employed to represent displacement and traction variations in the vicinity of the crack front in three‐dimensional geometries. The numerical procedure suggested for evaluating the singular integrals extending over these special elements is described. The efficiency and accuracy of the
Luchi M. L, RIZZUTI, Sergio
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Scattering by a planar three-dimensional crack

The Journal of the Acoustical Society of America, 1987
The scattering of a three-dimensional crack is formulated by the boundary integral equation method. A numerical scheme for solving the derived integral equations by using triangular boundary elements is described in detail. The computed results include the stress intensity factors and the scattered patterns for cracks having an elliptical shape.
W. Lin, L. M. Keer
openaire   +1 more source

Three-dimensional crack analysis

International Journal of Solids and Structures, 1977
Abstract A method is presented for the stress analysis of plane cracks of any shape in a stressed three-dimensional linear elastic space. The approach utilizes a system of integral equations which is defined over the crack area only. When these equations are solved for the unknown dislocations, all other quantities related to the crack and the space ...
openaire   +2 more sources