Dynamic analysis of a stiffened composite plate under blast load: A new model and experimental validation

Demet Balkan*, Özgür Demir, Aytaç Arıkoğlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

In this paper, the nonlinear dynamic behavior of a laminated composite plate with sandwich stiffener subjected to the non-uniform blast load is investigated. The main plate examined has four layers carbon/epoxy and the stiffeners composed of carbon/epoxy face sheets and polypropylene honeycomb core. The experimental and theoretical studies are carried out in order to investigate the effect of sandwich stiffeners on the dynamic response of laminated composite plates under the blast load. In the theoretical study, the equations of motion of the stiffened laminated composite plate are derived by the use of virtual work principle. Geometric nonlinearities are modelled by taking von Kármán Large Deformation Theory into account for the sandwich plate. The clamped boundary conditions are considered for all edges of the plate. The equations of motion are discretized into the time domain by using Galerkin's method. The nonlinear coupled equations system is solved by NDSOLVE function of Mathematica Software and the displacements, strains and stresses are calculated in order to investigate the stiffened laminated composite plate's response to the blast load. The experimental, theoretical and numerical analysis results are compared.

Original languageEnglish
Article number103591
JournalInternational Journal of Impact Engineering
Volume143
DOIs
Publication statusPublished - Sept 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd

Funding

This research is supported by The Scientific and Technological Research Council of Turkey under Project No. 114M404 .

FundersFunder number
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu114M404

    Keywords

    • Galerkin's method
    • Non-uniform blast load
    • Stiffened composite Plate

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