Abstract
Inelastic deformation and damage process of Graphite/Epoxy [±45°]4 laminate tubes under axial and combined axial and torsional loadings are discussed. The inelastic deformation and rupture properties under combined loading are discussed first. Significant viscoplastic deformation is induced by axial loading due to fiber rotation and matrix dominant deformation. The compressive strength of the laminate tubes is about 15% smaller than the tensile strength. Direction of twist has no noticeable influence on the torsional strength of the specimens. In the case of cyclic axial loadings, significant hysteresis loops and salient viscoplastic deformation are induced due to matrix dominant deformation. The negative stress ratios have marked effects on hysteresis curves, stiffness reduction and on fatigue life. These phenomena are attributable to the matrix dominant deformation of laminas and the accelerated viscoplastic deformation of polymer matrix under reversed loading. However, the fatigue strength is governed mainly by the maximum (or minimum) stress, and is influenced by the stress ratios. The fatigue strength under cyclic compression is 10 ~ 20% smaller than that of cyclic tension. The isochronous stress loci for fatigue life are also discussed.
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References
R. R. Fujczak, “Torsional Fatigue Behavior of Graphite-Epoxy Cylinders”, Proceedings of 1978 International Conference on Composite Materials(Toronto), American Inst. of Mining, Metallurgical and Petroleum Engineers Corp., p. 635–647
M.J. Owen and J.R. Griffiths, “Evaluation of Biaxial Stress Fatigue Surface for a Glass Fabric Reinforced Polyester Resin under Static and Fatigue Loading”, J. Material Science, 13, p. 1521–1537 (1978)
E. Krempl and Tyan-Min Niu, “Graphite/Epoxy [±45°]s Tubes. Their Static Axial and Shear Properties and Their Fatigue Behavior under Completely Reversed Load Controlled Loading”, J. Composite Materials, 16, p. 172–178 (1982)
E. Krempl, D. M. Elzey, B. Z. Hong, T. Ayar and R. G. Loewy, “Uniaxial and Biaxial Fatigue Properties of Thin-Walled Composite Tubes”, J. American Helicopter Society, 33, p.3–10 (1988)
K. Ikegami and M. Yoshida, “Constitutive Relations of Hybrid Fiber Reinforced Plastics of GFRP/CFRP and GFRP/AFRP under Combined Stress State”, Proc. IUTAM Symposium on Inelastic Deformation of Composite Materials (ed. by G. J. Dvorok), Springer-Verlag (in press)
R. E. Rowlands, “Strength (Failure) Theories and Their Experimental Correlation”, Failure Mechanics of Composites (ed. by G. C. Sih and A. M. Skudra), North-Holland, 1985, p. 96
H. Tobushi, S. Narumi and K. Osawa, “Biaxial Creep Deformation of Softened Celluloid under Variable Stresses”, Bull JSME, 29–248, p. 348–354 (1986)
H. Tobushi, Y. Ohashi and K. Osawa, “Creep Deformation of Softened Celluloid under Nonproportional Variable Stresses”, Bull JSME, 29–257, p. 3665–3671 (1986)
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© 1991 Springer-Verlag New York Inc.
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Murakami, S., Kanagawa, Y., Ishida, T., Tsushima, E. (1991). Inelastic Deformation and Fatigue Damage of Composite under Multiaxial Loading. In: Dvorak, G.J. (eds) Inelastic Deformation of Composite Materials. International Union of Theoretical and Applied Mechanics. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9109-8_33
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DOI: https://doi.org/10.1007/978-1-4613-9109-8_33
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