BUCKLING OF SYMMETRICALLY LAMINATED THIN RECTANGULAR COMPOSITE PLATES

Year 2017, Volume: 19 Issue: 56, 553 - 568, 01.05.2017

Erkin Altunsaray

Abstract

Critical buckling loads of symmetrically laminated thin rectangular composite plates were examined in this study. Rayleigh-Ritz Method was used to solve the governing energy equations based on Classical Laminated Plate Theory. Critical buckling loads of 24 differently laminated simply supported plates with in-plane force at the edge were calculated parametrically for 12 different aspect ratios. Results were compared with those obtained by ANSYS software package based on Finite Element Method, which seem to be approximate. The aim of this study was mainly to find the most suitable lamination type of plates. Nondimensionally tabulated results were given for practical use at the preliminary structural design stage of composite vessels. Thus, it is expected to save material, labor, time and test costs during production stage

Keywords

Symmetrically laminated thin rectangular composite plates, Buckling, Rayleigh-Ritz Method, Parametric Analysis

SİMETRİK KATMANLI İNCE DİKDÖRTGEN KOMPOZİT PLAKLARIN BURKULMASI

Abstract

Bu çalışmada simetrik katmanlı ince dikdörtgen kompozit plakların Laminasyon Plak Teorisi’nin (KLPT) denklemlerine göre RayleighRitz Yöntemi (R-R) ile gerçekleştirilmiştir. Kenarlarından basit mesnetli, düzlemsel yükleme etkisindeki (Nx) 24 farklı dizilimli kompozit plakın kritik burkulma yükü (N), 12 farklı kenar oranı (a/b ve b/a) için parametrik olarak hesaplanmıştır. Sonuçlar Sonlu Elemanlar Yöntemi (SEY) temelli ANSYS paket yazılımı sonuçlarıyla karşılaştırılmış ve yakın sonuçlar elde edilmiştir. Bu çalışmanın amacı; hazırlanan boyutsuz tabloların kullanımıyla uygun plak tiplerinin bulunması ve kompozit teknelerin yapısal ön tasarımında kullanılacak pratik bilgiler elde edilmesidir. Böylelikle üretim sırasında, malzeme, iş gücü, zaman ve test maliyetlerinden tasarruf edilmesi öngörülmüştür

Keywords

Simetrik katmanlı ince dikdörtgen kompozit plaklar, Burkulma, Rayleigh

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