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Influence of a central straight crack on the buckling behaviour of thin plates under tension, compression or shear loading

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Abstract

Thin-walled structural components, such as plates and shells, are used in several aerospace, naval, nuclear power plant, pressure vessels, mechanical and civil structures. Due to their high slenderness, the safety assessment of such structural components requires to carefully assess the buckling collapse which can strongly limit their bearing capacity. For very thin plate, buckling collapse can occur under shear, compression or even under tension. In the latter case, fracture or plastic failure can also take place instead of elastic instability. In the present paper, the effects of a central straight crack on the buckling collapse of rectangular elastic thin-plates—characterized by different boundary conditions, crack length and orientation—under compression, tension or shear loading are analysed. Accurate FE numerical parametric analyses have been performed to get the critical load multipliers in such loading cases. Moreover the effect of crack faces contact is examined and discussed. Some useful conclusions related to the sensitivity to cracks of the buckling loads for thin plates, especially in the case of shear stresses, are drawn. Cracked plates under tension are finally considered in order to determine the most probable collapse mechanism among fracture, plastic flow or buckling and some failure-type maps are determined.

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Acknowledgements

The author gratefully acknowledges the research support for this work provided by the Italian Ministry for University and Technological and Scientific Research (MIUR).

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  1. Department of Civil and Environmental Engineering & Architecture, University of Parma, Viale G.P. Usberti 181/A, Parma, 43100, Italy

    Roberto Brighenti

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  1. Roberto Brighenti
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Correspondence to Roberto Brighenti.

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Brighenti, R. Influence of a central straight crack on the buckling behaviour of thin plates under tension, compression or shear loading. Int J Mech Mater Des 6, 73–87 (2010). https://doi.org/10.1007/s10999-010-9122-6

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  • DOI: https://doi.org/10.1007/s10999-010-9122-6

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