Experimental and Theoretical Studies on Bending Performance of Hot Press GFRP Composite Panels

Öz

In this study, the bending performances of GFRP (glass fiber reinforced plastic) composite panels produced by the hot press method were investigated. For this purpose, composite plates prepared with glass fiber and resin were pressed under a certain temperature and pressure and turned into panels. The panels produced were subjected to bending test since they are materials that operate under variable loads. Three-point bending test was applied by taking samples of 14x150x6 mm3 size from the panels. Finite element analysis (FEA) was performed to verify the experiment and to visually examine the stress distribution. At the end of the study, experimental and theoretical results were compared, and the effects of applied loads were discussed. The highest bending stress was 150.39 MPa in the experiments, and 164.31 MPa in the SE analysis. The displacement of the material before damage is 4.92 mm and 5.46 mm for the test and FEA, respectively. It was observed that the results of the experiment and FEA gave close results. The results obtained will support the studies of determining the size and mechanical properties of GFRP composite materials before their use in different areas.

Anahtar Kelimeler

• GFRP
• Bending test
• Composite
• Hot press
• Finite element analysis

Sıcak Pres CETP Kompozit Panellerin Eğilme Performansları Üzerine Deneysel ve Teorik Çalışmalar

Öz

Bu çalışmada, sıcak pres yöntemi ile üretilmiş CETP (Cam elyaf takviyeli polimerler) kompozit panellerin eğilme performansları araştırılmıştır. Bu amaçla cam elyaf ve reçine ile hazırlanmış kompozit plakalar belli bir sıcaklık ve basınç altında preslenerek panellere çevrilmiştir. Üretilen paneller değişken yükler altında çalışan malzemeler olması nedeni ile eğilme testine tabi tutulmuştur. Panellerden 14×150×6 mm3 ebatlarında numuneler alınarak üç nokta eğilme testi uygulamıştır. Deneyin doğrulanması ve gerilme dağılımının görsel olarak incelenebilmesi amacıyla sonlu elemanlar analizi (SEA) yapılmıştır. Çalışma sonunda deneysel ve teorik sonuçlar karşılaştırılmış ve uygulanan yüklerin etkileri tartışılmıştır. Deneylerde en yüksek eğilme gerilmesi 150.39 MPa, SE analizinde ise 164.31 MPa şeklinde gerçekleşmiştir. Malzemenin hasar öncesi deplasmanı deney ve SEA için sırasıyla 4.92 mm ve 5.46 mm’dir. Deney ve SEA sonuçlarının birbirine yakın sonuçlar verdiği görülmüştür. Elde edilen sonuçlar CETP kompozit malzemelerin farklı alanlarda kullanımı öncesi boyut ve mekanik özelliklerin belirlenmesi çalışmalarına destek olacak niteliktedir.

Anahtar Kelimeler

• CETP
• Eğilme testi
• Kompozit
• Sıcak pres
• Sonlu elemanlar analizi

Kaynakça

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