New higher order plate theory in modeling delamination buckling of composite laminates

Aditi Chattopadhyay, Haozhong Gu

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

A new higher order plate theory for modeling delamination buckling and postbuckling of composite laminates is developed. Delaminations between layers of composite plates are modeled by jump discontinuity conditions, in both lower and higher order terms of displacements, at the delaminated interfaces. Some higher order terms are identified at the beginning of the formulation by using the conditions that shear stresses vanish at all free surfaces including the delaminated interfaces. Therefore, all boundary conditions for displacements and stresses are satisfied in the present theory. Geometric nonlinearity is included in computing layer buckling. The general governing equations, along with all boundary and continuity conditions of plates, are derived for predicting the delamination buckling and postbuckling behavior. The associated delamination growth problem is also examined by the use of Griffith-type fracture criterion. A numerical example is presented to validate the theory. The results are also compared with experimentally obtained data.

Original languageEnglish (US)
Pages (from-to)1709-1716
Number of pages8
JournalAIAA Journal
Volume32
Issue number8
StatePublished - Aug 1994

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Delamination
Laminates
Buckling
Composite materials
Shear stress
Boundary conditions

ASJC Scopus subject areas

  • Aerospace Engineering

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New higher order plate theory in modeling delamination buckling of composite laminates. / Chattopadhyay, Aditi; Gu, Haozhong.

In: AIAA Journal, Vol. 32, No. 8, 08.1994, p. 1709-1716.

Research output: Contribution to journalArticle

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