Investigation of Mechanical Behavior of Carbon Fiber Reinforced Sandwich Composites with Different Weights

Abstract

In this study, the impact and three-point bending performances of sandwich structures produced using carbon fiber-reinforced composite materials and XPS foam core with different fiber weights were investigated. Carbon fiber weighing 200 g/m² and 400 g/m² were used in sandwich structures. The reinforced layers were formed by placing four layers above and four layers below the XPS foam core. For the impact resistance test, low-speed impact tests and three-point bending tests were performed at 30 J, 50 J, and 70 J energy levels. As a result of the tests, it was determined that the increase in fiber weight has a significant effect on the impact resistance and bending strength of the materials. While the samples with a fiber weight of 200 g/m² reached a maximum force value of 1200 N under 30 J energy, the samples with a weight of 400 g/m² reached a force value of 6400 N. Similarly, at energy levels of 50 J and 70 J, heavier fiber samples provided higher maximum force and energy absorption. In three-point bending tests, samples with a fiber weight of 200 g/m² reached a maximum force value of 200 N, while samples with a weight of 400 g/m² reached up to 450 N. As a result, increasing the fiber weight significantly increased the mechanical strength and energy absorption capacity of sandwich structures, indicating that materials are a critical parameter for engineering applications.

Keywords

• Carbon Fiber
• Laminated Composite
• Low Speed Impact Test
• XPS Foam.

Farklı Ağırlıklara Sahip Karbon Elyaf Takviyeli Sandviç Kompozitlerin Mekanik Davranışlarının İncelenmesi

Öz

Bu çalışmada, farklı elyaf ağırlıklarına sahip karbon elyaf takviyeli kompozit malzemeler ve XPS köpük çekirdek kullanılarak üretilen sandviç yapıların darbe ve üç nokta eğme performansları incelenmiştir. Sandviç yapılarda 200 g/m² ve 400 g/m² ağırlığındaki karbon elyaf kullanılmıştır. Takviyeli tabakaları, XPS köpük çekirdeğin dört kat üstüne ve dört kat altına yerleştirilerek oluşturulmuştur. Darbe dayanımı testi için 30 J, 50 J ve 70 J enerji seviyelerinde düşük hızlı darbe testleri ve üç nokta eğme testleri gerçekleştirilmiştir. Yapılan testler sonucunda, elyaf ağırlığının artışı malzemelerin darbe dayanımı ve eğme mukavemeti üzerinde önemli bir etkiye sahip olduğu tespit edilmiştir. 200 g/m² elyaf ağırlığına sahip numuneler 30 J enerji altında 1200 N maksimum kuvvet değerine ulaşırken, 400 g/m² ağırlığındaki numuneler 6400 N'lik kuvvet değerine ulaşmıştır. Benzer şekilde, 50 J ve 70 J enerji seviyelerinde daha ağır elyaflı numuneler daha yüksek maksimum kuvvet ve enerji absorpsiyonu sağlamıştır. Üç nokta eğme testlerinde de 200 g/m² elyaf ağırlığına sahip numuneler 200 N maksimum kuvvet değerine ulaşırken, 400 g/m² ağırlığındaki numuneler 450 N'e kadar çıkmıştır. Sonuç olarak, elyaf ağırlığının artırılması, sandviç yapıların mekanik dayanıklılığını ve enerji absorbe kapasitesini önemli ölçüde artırmış, bu da malzemelerin mühendislik uygulamaları için kritik bir parametre olduğunu göstermektedir.

Anahtar Kelimeler

• Karbon elyaf
• Tabakalı kompozit
• Düşük hızlı darbe testi
• XPS köpük

Kaynakça

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