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论文类型：期刊论文

发表时间：1999-05-01

发表刊物：APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION

收录刊物：SCIE

卷号：20

期号：5

页面范围：503-512

ISSN号：0253-4827

关键字：laminated plate; vibration; buckling; initial imperfection; coupling effect; nonlinear dynamic stability

摘要：In this paper, the influence of initial imperfection and coupling between bending and extension on vibration, buckling and nonlinear dynamic stability of laminated plates is studied. The governing equation is derived. It is a nonlinear modified Mathieu Equation. Numerical solutions of 5 typical composite materials namely, Glass-epoxy Scotch-1002, Aramid-epoxy Kevlar-49, Boron-epoxy B4-5505, Graphite-epoxy T300-5208 and AS-3501 are computed. Results reveal that the existence of initial imperfection, and also coupling effect, make the plates much more sensitive to entering parametric resonance with amplitude greater than that of perfect plates. Coupling effect for different composite laminates, especially, for that with few layers, is different. If coupling effect is neglected, the design of plate structures for buckling and dynamic stability would unconservatively be for more than 10%.