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Tension and bending of finite thickness plates with a semi-elliptical surface crack

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Abstract

This paper deals with the tension and bending of finite thickness plates with a semi-elliptical surface crack. The analysis is performed by means of a modified body force method, in which the accuracy and the validity are greatly improved by using reasonable patterns of the body force densities and the resultant force boundary conditions. Numerical calculations are done for various combinations of the shape and the size of the crack, and practically exact values of the stress intensity factors are determined by extrapolating the numerical results for several mesh patterns. Empirical formulae in polynomial forms are also presented for convenience of practical use.

Résumé

L'étude traite de la mise sous traction et flexion d'une plaque d'épaisseur finie comportant une fissure de surface semi-elliptique. On recourt pour l'analyse à une méthode modifiée d'évaluation des champs de force, où la précision et la validité ont été améliorées en utilisant des configurations pondérées des densités des forces, et des conditions aux limites qui en résultent.

Des calculs numériques sont effectués pour diverses combinaisons de forme et de taille d'une fissure, et l'on détermine des valeurs pratiquement exactes des facteurs d'intensité de contraintes en extrapolant les résultats numériques ä diverses configurations de maillage.

Des formules empiriques sous forme polynominale sont également présentées en vue de rendre aisée leur utilisation pratique.

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Isida, M., Noguchi, H. & Yoshida, T. Tension and bending of finite thickness plates with a semi-elliptical surface crack. Int J Fract 26, 157–188 (1984). https://doi.org/10.1007/BF01140626

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  • DOI: https://doi.org/10.1007/BF01140626

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