Results 251 to 260 of about 1,447,308 (304)

Strict Bounds for Computed Stress Intensity Factors

Civil-Comp Proceedings, 2009
This paper addresses the subject of local error estimators for finite element methods involving local enrichment. More precisely, we focus on the extended finite element method, which was developed in the last decade for fracture mechanics. We present a method for the calculation of accurate strict bounds of mixed-mode stress intensity factors ...
Panetier, Julien, Ladevèze, Pierre, Louf, François   +2 more
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A Stress Intensity Factor Tracer

Journal of Applied Mechanics, 1985
A new optical method, Stress Intensity Factor Tracer (SIFT), has been developed. The device measures continuously the real-time stress intensity factor variation, K1(t), of a moving crack tip using a single, stationary photodetector. The method uses the fact that any variation in K1(t) leads to a change in the intensity of light, I(t), impinging on a ...
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Stress intensity factors for cracked wedges

International Journal of Solids and Structures, 1981
Abstract The elasticity solution to the problem of a cracked semi-infinite wedge is presented. The crack emanates from the wedge apex bisecting the wedge angle. Crack surfaces are subjected to a pair of opposing concentrated forces directed either normal or tangential to the crack plane and located an arbitrary distance from the wedge tip.
Stone, S. F., Westmann, R. A.
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Dynamic Stress Intensity Factor

2003
An infinite strip of height 2h with a semi-infinite crack is rigidly clamped along its upper and lower faces at y = ± h (Figure 1). The upper and lower faces are moved in the positive and negative y-direction over distances u0, respectively. Determine the dynamic stress intensity factor K(t) during steady state crack propagation.
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Stress intensity factors for interacting cracks

Engineering Fracture Mechanics, 1987
Abstract Experimental stress intensity factors (SIFs) for two interacting straight cracks in plane-homogeneous regions were determined. Photoelastic data were collected from digitally sharpened isochromatic fringe patterns by using a digital image analysis system. SIFs were extracted by using the field equations derived from Williams' stress function.
A. Mehdi-Soozani, I. Miskioglu, C.P. Burger, T.J. Rudolphi   +3 more
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Stress intensity factors in fretting fatigue

The Journal of Strain Analysis for Engineering Design, 1979
Solutions are derived for mode I and mode II stress intensity factors for a crack at the edge of a sheet subjected to localized fretting forces. Both normal and tangential forces are considered. These solutions are approximated by a polynomial function of crack length, which is then used as a Green's function to derive stress intensity factors for ...
D P Rooke, D A Jones
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Extended Stress Intensity Factor Concepts

2013
The stress intensity factor concept for describing the stress field at pointed crack or slit tips is well known from fracture mechanics. It is substantially extended here in two directions. One extension refers to pointed V-notches with stress intensities depending on the notch opening angle. The loading mode related notch stress intensity factors K 1,
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Summary of Stress-Intensity Factors

1996
Abstract The stress-intensity concept is based on the parameter that quantifies the stresses at a crack tip. This article summarizes some stress-intensity factors for various crack geometries commonly found in structural components. Through-the-thickness cracks may be located in the middle of a plate; at the edge of a plate; or at the ...
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Determination of stress intensity factors

1982
The application of fracture mechanics principles bears largely upon the stress intensity factor. An essential part of the solution of a fracture problem in linear elastic fracture mechanics is the establishment of the stress intensity factor for the crack problem under consideration. Since the introduction of fracture mechanics much effort has been put
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Thermo-mechanical stress intensity factors evaluation

Nuclear Engineering and Design, 2010
This paper deals with the evaluation of the static mixed-mode stress intensity factors in case of thermal and mechanical loadings. A method and a formulation based on the J-integral and the energy release rate formulation is developed. The numerical results emphasize the effects of the temperature field on the stress intensity factors; thus, we show ...
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