E.H. Dowell's Aeroelasticity of plates and shells PDF

By E.H. Dowell

ISBN-10: 9028604049

ISBN-13: 9789028604049

E-book via Dowell, E.H.

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Extra resources for Aeroelasticity of plates and shells

Example text

Suppose that the cracked solid is stretched by an inclined uniform load 0'. 18). Based on the 8-criterion, the planes cPo for various values of a around the crack periphery are obtained. , cPo =1= 0°) except at the intersections of the major and minor axes with the crack border. 1 for different ratios of 6/0. Fora penny-shaped crack 6/0= 1, fracture will always occur in the normal plane cPo = o. The corresponding values of 00 in the cPo-planes will depend on the crack geometry, load position and Poisson's ratio of the material.

The peak value is a function of Poisson's ratio. Smin/u2a = constant there exists a critical angle Po at which the critical applied compressive stress is a minimum. 5 V) :1. 7. Variations of density factor with crack angle for tensile loading. minum alloy in [18]. All the tests were carried out in specimens containing an inclined crack. 9. 2 ksi y'iil. , respectively. The agreement is good. /2 corresponding to Mode I crack extension and Scr remained essentially constant. Although corrections for plasticity ahead of the crack can be made, it is not considered to be essential in this discussion.

Miscellaneous crack problems of fundamental nature. The present theory has opened the door to a new and fruitful area of research in fracture mechanics. The future progress will depend largely on the willingness of the practitioners in the field to accept this new concept. There is no doubt that the classical theory will have to be replaced so that technology in fracture mechanics can advance and provide solutions to numerous previously unanswered questions, particularly in the area of applying fracture mechanics to structure problems.

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Aeroelasticity of plates and shells by E.H. Dowell


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