Investigation of mechanical properties of unsaturated polyester – glass fiber composites used for boat structure
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Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Altınbaş Üniversitesi / Lisansüstü Eğitim Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Mechanical properties are important to choose the suitable material in the manufacturing of
boats. In this research, the effect of glass fiber orientations and the fillers weight fraction on the
Mechanical properties of composite materials that contain unsaturated polyester as a base
material were studied in two cases, the first case is test the samples at room temperature, while in
the second case the samples are tested after immersed it in sea water for 14 days. Tensile
strength, impact resistance and water absorption tests were performed. The glass fibers were
used at (0/0, 0/90, 45/45) angles with 30% wt. The carbon and the aluminum oxide Nano be used
as fillers with (2.5%, 5%, 7.5%) and (0%, 1%, 3%) weight fraction respectively. The standard
Taguchi’s array L9 (33
) was used. The analysis of mean, the signal to noise ratio and analysis of
variance were introduced to analyze and estimate the optimal combination parameters. The
results show that the mechanical properties improved by rather than that of pure unsaturated
polyester.
The glass fibers orientations angle presents the most parameter effect than the other parameters
on the elasticity modulus, tensile resistance and impact resistance with a contribution of 81.8%,
83.39% and 96.75% respectively. Followed by carbon and aluminum oxide Nano filler. Carbon filler is the most parameter effect in the water absorption test than the other parameters with a
contribution of 44.31%, followed by fiber orientation angle and aluminum oxide Nano filler. The
optimum parameter with their levels for the highest elastic modulus was obtained at (0/90 fiber
orientation, 2.5% carbon and 1% Nano aluminum oxide filler). While the highest tensile
resistance and impact resistance present with using (0/0 fiber orientation, 5% carbon filler and 1
aluminum oxide nanofiller). It was found that the lowest value of water absorption was at (0/0
fiber orientation, 2.5% carbon filler and 0% aluminum oxide Nano filler).
In the case of samples that were immersed in sea water for 14 days, it was found that the most
parameter effect than the other parameters on the modulus of elasticity and water absorption was
the aluminum oxide Nano filler with a contribution of 36.53% and 40.58% respectively,
followed by the carbon filler and finally the direction of the fiber. And it was found that the
parameter most influence on tensile resistance and impact resistance is the direction angle of the
fiber, where its contribution was 78.6% and 91.42% respectively, followed by alumina oxide
Nano filler and finally carbon filler. It can be noticed that the sea water will influenced the
parameters and their level effects on the composite properties.
Açıklama
Anahtar Kelimeler
Composite Material, Mechanical Properties, Taguchi Technique
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Owaid, Anmar Abdulazeez. (2021). Investigation of mechanical properties of unsaturated polyester – glass fiber composites used for boat structure. (Yayınlanmamış yüksek lisans tezi). Altınbaş Üniversitesi, Lisansüstü Eğitim Enstitüsü, İstanbul.
