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Effects of fiber length and orientation on elasticity of fiber-reinforced plywood
Journal of Wood Science volume 44, pages 343–347 (1998)
Abstract
Short carbon fibers, a reinforced material in wood veneer composites, were used to investigate the effects of fiber length and orientation of fibers on the elasticity of plywood. The technical feasibility, elasticity, and strength of the reinforced plywood with short carbon fiber were evaluated. In a short fiber reinforcement system, the fiber length does not directly influence the reinforcement in Cox's theory when the fiber length exceeded a certain length. When the length of short carbon fiber is beyond 3 mm, the high reinforced result was obtained in the experiment. However, if fiber length was too long, the reinforced result was less owing to the bridge between fibers and the increase of holes. The optimum fiber length must be considered. The orientation of fibers has a strong influence on the reinforcement. Unidirectional, perpendicular, and random orientation displayed different influence on the elasticity. Experimental results were discussed with Cox's method. Reinforced plywood with short carbon fibers in random orientation has a higher shear modulus and bending strength than the controls, in addition to other mechanical properties.
References
Spann FD (1981) Reinforcement of wood with fiberglass. For Prod J 31(4):91–96
Smulski SJ, Ifju G (1987) Flexural behavior of glass fiber reinforced hardboard. Wood Fiber Sci 19:313–327
Xu H, Tanaka C, Nakao T, Nisino Y, Katayama H (1996) Flexural and shear properties of fiber-reinforced plywood. Mokuzai Gakkaishi 42:376–382
Tomimura Y, Suzuki I (1987) Manufacture of medium density fiberboard containing carbon fibers in the core layer (in Japanese). Mokuzai Gakkaishi 33:645–649
Yanagawa Y (1994) Mechanical properties of wood and glassfiber composites (in Japanese). Mokuzai Gakkaishi 40:1341–1347
Fukuda H (1994) Fukugou zairyou kiso kougaku (in Japanese). Gendai Kougaku Sya, Tokyo, pp 205–263
Timoshenko SP (1921) On the correction for shear of the differential equation for transverse vibrations of prismatic bars. Phil Mag Ser 41:744–764
Goens E (1931) Determination of Young's modulus from flexural vibrations. Ann Physik Ser 11:649–678
Hearmon RFS (1958) The influence of shear and rotatory inertia on the free flexural vibration of wooden beams. Br J Appl Phys 9:381–388
Nakao T, Okano T (1987) Evaluation of modulus of rigidity by dynamic plate shear testing. Wood Fiber Sci 19:332–338
Cox HL (1952) The elasticity and strength of paper and other fibrous materials. Br J Appl Phys 3 (March):72–79
Maki H, Simamura S (1973) Fukugou Zairyou Gityutus Gijyutsu Syuusei (in Japanese). Sangyou Gijuutsu Center, Tokyo, pp 215, 249
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Xu, H., Nakao, T., Tanaka, C. et al. Effects of fiber length and orientation on elasticity of fiber-reinforced plywood. J Wood Sci 44, 343–347 (1998). https://doi.org/10.1007/BF01130445
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DOI: https://doi.org/10.1007/BF01130445
Key words
- Short fiber
- Reinforcement
- Fiber length
- Fiber orientation
- Plywood