Analytical determination of buckling load of a delaminated plate subjected to axial compression

Chattopadhyay, Lalitha (2012) Analytical determination of buckling load of a delaminated plate subjected to axial compression. International Journal of Applied Mathematics and Mechanics, 8 (18). pp. 38-51. ISSN 0973-0184

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    Abstract

    Delamination, which is the lack of adhesion and of continuity between two adjacent layers of a laminate, is probably one of the most common types of damages in composite structures. Under in-plane compression such delamination may buckle and tend to enlarge the delaminated area, which can lead to loss of global structural stability. This paper presents elastic buckling and postbuckling analysis of an axially loaded isotropic beam-plate with an across-the- width delamination symmetrically w.r.t the axis perpendicular to the mid- plane of the plate, located at a given depth. The analysis is done by considering an isotropic plate containing through-width delamination, subjected to in-plane compression. A simple analytical model for determining the global buckling load of the plate with delamination is developed, and an analytical technique using integral transform is developed for the determination of strain energy release rate, G, for a given delamination length. The strain energy release rate is obtained and compared with literature results. The influence of delamination size and the applied load on G is studied. It is observed that the strain energy release rate is zero prior to local delamination buckling and that there is a significant increase in G at the time of local buckling.

    Item Type: Journal Article
    Additional Information: Copyright for this article belongs to M/s. IJAMM
    Uncontrolled Keywords: Delamination;Buckling;Strain energy release rate;Integral transform
    Subjects: AERONAUTICS > Aeronautics (General)
    CHEMISTRY AND MATERIALS > Composite Materials
    Division/Department: Structural Technologies Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 11 Jan 2013 16:00
    Last Modified: 11 Jan 2013 16:00
    URI: http://nal-ir.nal.res.in/id/eprint/11438

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