Dalam proses pembuatan komposit, orientasi fiber adalah salah satu faktor yang amat penting yang perlu diambil kira. Kewujudan sudut yang tidak sama di dalam proses fiber boleh menyebabkan kemerosotan prestasi mekanikal komposit tersebut. Sifat-sifat sandwich komposit boleh berubah dari segi pelbagai aspek terutamanya semasa proses pembuatan komposit tersebut. Kajian ini menunjukkan pengaruh orientasi fiber terhadap sifat mekanikal komposit sandwich. Proses pembuatan yang digunakan untuk membuat komposit sandwich adalah proses ‘wet hand lay-up’. Orientasi fiber telah ditetapkan kepada 0°, 9° dan 15°. Kesan orientasi fiber ini dikaji dengan menjalankan ujian mekanikal terhadap komposit. Ujian yang dijalankan adalah ujian mampatan dan ujian lenturan. Hasil teoritis menunjukkan penurunan prestasi mekanikal komposit apabila sudut orientasi fiber meningkat. Beberapa spesimen dengan sudut orientasi fiber yang berbeza dibuat untuk mengkaji dan membuktikan hasil teoritis dan hasil kajian menunjukkan setiap kenaikkan sudut mempengaruhi prestasi mekanikal komposit sandwich. Daripada kajian ini, terbukti bahawa orieantasi fiber memainkan peranan yang besar dalam menentukan prestasi komposit sandwich. Ini kerana, walaupun sudut fiber yang lari sangat kecil, prestasi komposit menurun dan perbezaannya sangat ketara.
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In composites manufacturing process, fibre orientation of the composites is one of the most important factor in composites manufacturing that needs to be taken account into as any misalign angle present in the fibre lay-up could lead to the decrease of the composites mechanical performances. The properties of the sandwich composites materials can be affected by every aspect especially during the manufacturing process of the composite. This study shows the effect of fibre orientation on the mechanical properties of a sandwich composite material. The manufacturing process used to manufacture the composites is a wet hand lay-up process. The orientation of the glass fibre is set to 0°, 9° and 15°. The effect of the fibre orientation is analysed by performing the mechanical test on the composites. Test to be performed is set to be compression test and bending test. Theoretical results shows that the mechanical performance of the composite decrease as the offset angle of the glass fibre increases. Several specimens with different fibre orientation is manufacture to analyse and proof the theoretical results and the analysis shows that each fibre offset angle can affect the mechanical performance of the sandwich composite. Therefore, it can concluded that fibre orientation significantly effects the performances of the sandwich composites as even a small misalign angle could lead to a significant decrease of the composites mechanical performance.
Effect of fibre orientation on the mechanical properties of sandwich composite material / Mukhlisin Aminuddin