Kenevir lifli sandviç panellerin 3 nokta eğilme davranışları

Year 2023, Volume: 15 Issue: 3, 103 - 110, 30.12.2023

Onur Kelten , Abdülmecit Güldaş

https://doi.org/10.55974/utbd.1322745

Abstract

Bu makale, ham petrol rezervlerinin azalması, çevresel endişeler ve karbon emisyonlarının azaltılmasına yönelik düzenlemeler gibi nedenlerle, kompozitlerin geliştirilmesinde sentetik liflerin yerine doğal liflerin artan ilgisini tartışmaktadır. Doğal liflerin mekanik özellikleri, kimyasal bileşimleri ve yapısı ile yakından ilişkilidir ve hasat zamanı, büyüme koşulları, depolama uygulamaları, çıkarma teknikleri ve ön üretim kimyasal işlemler gibi çeşitli faktörler tarafından etkilenebilir. Makalede ayrıca iki karbon prepreg tabakası arasına 3 mm çapında 20 mm aralıklarla kenevir lifleri kullanılarak oluşturulan bir sandviç yapının 3 nokta eğilme testi için sonlu elemanlar analiz adımları anlatılmıştır. Son olarak da kenevir lifi aralıklarındaki değişimin ve kenevir lifi çapındaki değişimin gerilime etkilerini göstermek için 10 mm, 20 mm ve 30 mm aralıklarla; 2 mm, 3 mm ve 4 mm çaplarındaki kenevir lifleri kullanılarak oluşturulan sandviç yapılara ait nümerik analiz çıktıları grafik olarak verilmiştir.

Keywords

Kenevir elyaf, 3 Nokta eğilme testi, Sandviç model, Statik analiz

Supporting Institution

Türk Havacılık ve Uzay Sanayi

3-Point bending behaviors of sandwich panels with hemp fibers

Abstract

The article discusses the increasing interest in natural fibers as a substitute for synthetic fibers in the development of composites due to the depletion of crude oil reserves, environmental concerns and regulations targeting the reduction of carbon emissions. The mechanical properties of natural fibers are closely linked to their chemical composition and structure, which can be influenced by various factors such as harvesting time, growth conditions, storage practices, extraction techniques and pre fabrication chemical treatments. The article also explains the finite element analysis steps for a sandwich structure created using hemp fibers with a 3 mm diameter and 20 mm spacing between two carbon prepreg layers for a 3-point bending test.Finally, numerical analysis outputs of sandwich structures created with hemp fibers at intervals of 10 mm, 20 mm, and 30 mm, and diameters of 2 mm, 3 mm, and 4 mm, are presented graphically to demonstrate the effects of changes in hemp fiber spacing and diameter on stress.

Keywords

Hemp fiber, 3 Point bending test, Sandwich model, Statical analysis

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