Farklı açılardaki çeşitli çokgen delikli kare plakların burkulma analizi

Year 2024, , 149 - 163, 15.03.2024

Mustafa Halûk Saraçoğlu , Fethullah Uslu , Uğur Albayrak

https://doi.org/10.17714/gumusfenbil.1330261

Abstract

Plakların burkulması, yapıların tasarımında büyük önem taşımaktadır. Plakta zorunlu olarak bir delik olması gerekiyorsa, delik alanı ve şekli de kritik burkulma yüklerini etkileyecektir. Bu çalışmada, çeşitli delik şekillerine ve farklı yükleme tiplerine sahip delikli basit mesnetli kare plakaların burkulma analizleri incelenmiştir. Farklı dönme açılarına sahip dairesel, altıgen ve kare olmak üzere üç farklı delik şekli modeli dikkate alınmıştır. Narinlik oranı etkisini araştırmak için ise örnekler 100, 20 ve 10 olmak üzere üç farklı narinlik oranı değeri ile hesaplanmıştır. Yükleme tipinin etkisini incelemek için numuneler dört farklı düzlem içi yük ile yüklenmiştir. Analizler genel amaçlı bir sonlu elemanlar programı kullanılarak gerçekleştirilmiş ve farklı çokgen deliklere sahip kare plak modelleri için dönme açılarına bağlı olarak kritik burkulma yükleri belirlenmiştir. Kritik burkulma yükü, dairesel delikli plakalar için dönme açısından bağımsızdır, ancak altıgen ve kare delikli delikler için bağımlı olacaktır. Bu plaklar için 0 dereceden 90 dereceye kadar farklı dönme açıları için burkulma analizleri yapılmıştır. Sonuçlar, delik alanları aynı olmasına rağmen hesaplanan kritik burkulma yüklerinin aynı kalmadığını göstermektedir.

Keywords

Burkulma analizi, Altıgen delik, Dönme açısı, Delikli plak

Buckling analysis of perforated square plates with different oriented various shaped polygon holes

Abstract

Buckling of the plates is of great importance in design of structures. If the plate has a hole because of necessity, hole area and shape also affect the critical buckling loads. In this study, buckling analyses of perforated simply supported square plates with various perforation patterns and different loading types were investigated. Three different perforation patterns as circular, hexagonal and square with different orientations were considered. In order to investigate the slenderness ratio effect, samples were calculated with three different ratio values of 100, 20 and 10. The samples were loaded with four different in-plane loads to examine the effect of loading type. Analyses were performed by using a general purpose finite element program and critical buckling loads were determined depending on the orientation angles for square plate models with different hole perforations. The critical buckling load is independent from the orientation angle for circular perforated plates but depends on for hexagonal and square hole perforations. For these plates buckling analyses were performed for different orientation angles of 0 degrees to 90 degrees. The results show that the calculated critical buckling loads did not remain the same although the hole areas were the same.

Keywords

Buckling analysis, Hexagonal hole, Orientation angle, Perforated plates

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