Results 261 to 270 of about 165,542 (311)
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Three‐dimensional analysis of thermally loaded cracks
International Journal for Numerical Methods in Engineering, 1993AbstractThe 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. +2 more
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Three‐dimensional liquid transport in concrete cracks
International Journal for Numerical and Analytical Methods in Geomechanics, 2004AbstractCracks 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. +3 more
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Three-dimensional crack analysis
International Journal of Solids and Structures, 1977Abstract 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 ...
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Self-Similar Crack Expansion Method for Three-Dimensional Crack Analysis
Journal of Applied Mechanics, 1997The self-similar crack expansion method is developed to calculate stress intensity factors for three-dimensional cracks in an infinite medium or semi-infinite medium by the boundary integral element technique. With this method, the stress intensity factors at crack tips are determined by calculating the crack-opening displacements over the crack ...
Xu, Yonglin, Moran, B., Belytschko, T.
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Boundary elements for three‐dimensional elastic crack analysis
International Journal for Numerical Methods in Engineering, 1987AbstractIn 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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AN ANALYSIS FOR THREE DIMENSIONAL CRACKS
Fatigue & Fracture of Engineering Materials & Structures, 1994Abstract— A new method of analysis is proposed for an infinite solid containing an embedded plane crack of arbitrary shape. The analysis is fundamentally based on the body force method, but proper expressions of the body force densities are introduced and the stress conditions of the crack surface are replaced by the resultant force conditions in order
M. ISIDA, H. TSURU, H. NOGUCHI
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Analysis of Three-Dimensional Cracks with Independent Crack Mesh
Solid State Phenomena, 2006In 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 +4 more
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Three-Dimensional Analysis of Laminates With Cross Cracks
Journal of Applied Mechanics, 1988An 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. +2 more
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Three-Dimensional Cracks: An Introduction
1996In the previous chapters the solution of two-dimensional and axi-symmetric crack problems have been examined in detail by employing the technique of distributing strain nuclei (in the form of dislocations or dislocation dipoles). Although the two-dimensional crack models give a good approximation to crack geometries encountered, most defects or cracks ...
D. A. Hills +3 more
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Three‐dimensional crack analysis using singular boundary elements
International Journal for Numerical Methods in Engineering, 1989AbstractA multi‐domain method of solving three‐dimensional elastic crack problems in an infinite elastic body using the boundary element method is proposed. The displacement and traction behaviours near a crack front are incorporated in special crack elements.
Jia, Z. H., Shippy, D. J., Rizzo, F. J.
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