On finite element model for the analysis of through cracks in laminated anisotropic cylindrical shells

Lakshminarayana, HV and Murthy, MVV and Srinath, LS (1981) On finite element model for the analysis of through cracks in laminated anisotropic cylindrical shells. Engineering Fracture Mechanics, 14 (4). pp. 697-712. ISSN 0013-7944

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    A finite element model is developed to analyze laminated composite cylindrical shells with through cracks, in order to solve the problem of the effect of sharp notches on the strength of such shells, used in structural applications. Anisotropic elastic behavior, bending-extensional coupling, and transverse shear deformation effects are taken into consideration, the model being based on a refined shallow shell theory analogous to Mindlin's (1951) theory for flat plates and the approach of dividing a cracked configuration into triangular-shaped singular elements around the crack tip with adjoining quadrilateral-shaped regular elements. The parabolic isoparametric cylindrical shell elements (both singular and regular) used in the model, in which independent displacement and rotation interpolation is used directly in the shell middle surface, are similar to the degenerate solid thick shell elements used by Barsoum et al. (1979). The model yields accurate stress intensity factors from a relatively coarse mesh, and the variation of the effective stress intensity factor with the orthotropic parameter is established. The model can be applied to arbitrary lamination patterns, and it can be used for fracture mechanics analyses without any major modifications.

    Item Type: Journal Article
    Additional Information: Copyright for this article belongs to Elsevier Science Ltd.
    Uncontrolled Keywords: Anisotropic shells;Cylindrical shells;Finite element method;Fracture mechanics;Laminates;Shell stability;Crack propagation;Elastic properties; Mesh;Reinforced shells; Shear properties; Shell theory; Stress distribution; Stress intensity factors
    Subjects: ENGINEERING > Structural Mechanics
    Division/Department: Structures Division, Structures Division, Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 08 Feb 2010
    Last Modified: 03 May 2012 10:19
    URI: http://nal-ir.nal.res.in/id/eprint/882

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