EFFECT OF ORIENTATION ANGLES ON VIBRATION PROPERTIES AT CARBON FIBER REINFORCED POLYMERIC COMPOSITES

Yıl 2018, Cilt: 13 Sayı: 3, 180 - 189, 23.07.2018

Muhammet Raci Aydın Ömer Gündoğdu Barbaros Kaya Gürbüz Bayraktar Okan Kaan Aksuoğlu Osman Hotunlu

Öz

In this study, composite plates with dimensions of 300x300mm were
produced by VARTM (Vacuum Assisted Resin Transfer Molding) method using
unidirectional carbon fiber fabrics. The composite plates were produced
symmetrically at four different orientations ((0°)₄,(60°/-30°)_S,(45°/-45°)_S,
(0°/90°)_S) and four layered. Required specimens according to
three-point bending and vibration tests related ASTM standards for were cut
from produced plates. The maximum flexural stresses of the specimens were
determined by performing three-point bending tests. Free vibration tests under
fixed-free boundary conditions were performed to determine their natural
frequencies and damping ratios. As a result of the tests, specimens with (0°)₄
directional angles were found to have the highest bending strength. Also,
composite specimens with orientation angles (0°)₄ have the highest
natural frequencies and lowest damping ratios. (45°, -45°)_S, the
natural frequency values were the lowest while the damping ratio values were
found to be the highest.

Anahtar Kelimeler

Laminated Composite Structure, Damding Ratio, Fiber Orientation Angle, Vibration Properties, Flexural Stress

Kaynakça

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