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

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

References

1. [1] Treviso, A., Genechten, B.V., Mundo, D., and Tournour, M., (2015). Damping in Composite Materials: Properties and Models. Composites Part B, 78, pp:144-152.
2. [2] Chung, D., (2003). Structural Composite Materials Tailored for Damping. J Alloys Compd, 355, pp:216-223.
3. [3] Ni, R. and Adams, R., (1984). A Rational Method for Obtaining the Dynamic Mechanical Properties of Laminae for Predicting the Stiffness and Damping of Laminated Plates and Beams. Composites, 15(3), pp:193-199.
4. [4] Maheri, M. and Adams, R., (2003). Modal Vibration Damping of Anisotropic FRP Laminates Using the RayleigheRitz Energy Minimization Scheme. J Sound Vib., 259(1), pp:17-29.
5. [5] Doebling, S., Farrar, C., Prime, M., and Shevitz, D., (1996). Damage Identification and Health Monitoring of Structural and Mechanical Systems from Changes in Their Vibration Characteristics: a Literature Review. The Shock and Vibration Digest, Tech. rep. Los Alamos National Laboratory, vol:30, pp:88-92.
6. [6] Berthelot, J.M. and Sefrani, Y., (2004). Damping Analysis of Unidirectional Glass and Kevlar Fibre Composites, Compos Sci Technol, 64(9), pp:1261-1278.
7. [7] Crane R. and Gillespie, J., (1991). Characterization of the Vibration Damping Loss Factor of Glass and Graphite Fiber Composites, Compos Sci Technol, 40(4), pp:355-375.
8. [8] Wright, G., (1972). The Dynamic Properties of Glass and Carbon Fibre Reinforced Plastic Beams, J Sound Vib, 21, pp:205-212.

9. [9] Berthelot, J.M., Assarar, M., Sefrani, Y., and El-Mahi, A., (2008). Damping Analysis of Composite Materials and Structures, Compos Struct., 85(3), pp:189-204.
10. [10] Adams R. and Bacon, D., (1973). Effect of Fibre Orientation and Laminate Geometry on the Dynamic Properties of CFRP, J Compos Mater.,7(4), pp:402-428.
11. [11] Gibson R., Chaturvedi, S., and Sun, C., (1982). Complex Moduli of Aligned Discontinuous Fibre-Reinforced Polymer Composites, J Mater Sci, 17:3, pp:499-509.
12. [12] Tsai, J.L. and Chi, Y.K., (2008). Effect of Fiber Array opp.n Damping Behaviors of Fiber Composites, Compos Part B: Eng, 39(7-8), pp:1196-1204.
13. [13] Ungar, E. and Kerwin, E., (1962). Loss Factors of Viscoelastic Systems in terms of Energy Concepts, J Acoust Soc Am, 34(7), pp:954-957.
14. [14] Pei, X.Y. and Li, J.L., (2012). The Effects of Fiber Orientation on the Vibration Modal Behavior of Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites, Advanced Materials Research, Vol:391-392, pp:345-348.
15. [15] Rueppel, M., Rion, J., Dransfeld, C., Fischer, C., and Masania, K., (2017). Damping of Carbon Fibre and Flax Fibre Angle-ply Composite Laminates, Composites Science and Technology, 146, pp:1-9.
16. [16] Utomo, J.T., Susilo, D.D., and Raharja, W.W., (2017). The Influence of the Number and Position of the Carbon Fiber Lamina on the Natural Frequency and Damping Ratio of the Carbon-glass Hybrid Composite, International Conference on Engineering, Science and Nanotechnology (ICESNANO 2016), 03:(0046), pp:1-6.
17. [17] Nagasankar, P., Prabu, S.B., and Velmurugan, R., (2012). The Influence of the Different Fiber lay-ups on the Damping Characteristics of Polymer Matrix Composite, Journal of Applied Sciences, 12:(10) pp:1071-107.
18. [18] ASTM D790–10, (2011). Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. ASTM International, PA 19428-2959, United States.
19. [19] ASTM Standard E756−05 (Reapproved 2010), (2013). Standard Test Method for Measuring Vibration-Damping Properties of Materials, ASTM International, West Conshohocken, PA, USA.
20. [20] Rao, S.S., (2011). Mechanical Vibration (fifth edition), Pearson, USA.