Fatigue Behavior of High Performance Fiber Yarns

Rao Y; Farris RJ; Sakuda M

Korea Polymer Journal, Vol.6, No.1, 91-104, March, 1998

the fatigue behavior of a variety of commercialhigh performance fiber yarns has been investigated. A general semiogrithmic law governs the relationship between fatigue lifetime and normalized load amplitude. Fatigue behavior is characterized by fatigue strength and fatigue strength index. the fatigue resistance of different fibers ranked as: Kevlar 5-29-Kevlar 119, Verctran Hs-Technora, Spectra 900. A fatigue failure model is proposed to support a fatigue law which suggests that the cyclic maximum strain can be used to monitor the development twist is observed. Axial splitting is seen in all fatigue fractured surfaces. Structural changes measured by X-ray diffraction and thermomechanicl analysis(TMA) support the conclusion that the strength of the material is depleted with the fatigue.

[References]

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[2] Ohta Y, Sugiyama H, Yasuda H, J. Polym. Sci. B: Polym. Phys., 32(2), 261 (1994)

[3] Ericksen RH, Polymer, 26, 733 (1985)

[4] Lafitte MH, Bunsell AR, Polym. Eng. Sci., 25(3), 182 (1985)

[5] Kpnopasek L, Hearle JWS, J. Appl. Polym. Sci., 21, 2791 (1977)

[6] Lafitte MH, Bunsell AR, J. Mater. Sci., 17, 2391 (1982)

[7] Bunsell AR, J. Mater. Sci., 10, 1300 (1975)

[8] Wang JZ, Dillard DA, Ward TC, J. Polym. Sci. B: Polym. Phys., 30, 1391 (1992)

[9] Ward IM, J. Mater. Sci., 6, 1397 (1971)

[10] Kwolek SL, U.S. Patent, 3,671,542 (1972)

[11] Allen SR, Roche EJ, Polymer, 30, 996 (1989)

[12] Northolt MG, Polymer, 21, 1199 (1980)

[13] Northolt MG, van Aartson JJ, J. Polym. Sci. Polym. Symp. (1977)

[14] Barton R, Macromol. Sci. Phys., B24, 119 (1986)

[15] Wu TM, Blackwell J, Macromolecules, 29(17), 5621 (1996)

[16] Li Y, Wu C, Chu B, J. Polym. Sci. B: Polym. Phys., 29, 1309 (1991)

[17] Panar M, Avakian P, Blumem RC, Cardner KH, Fierke TD, Yang HH, J. Polym. Sci. B: Polym. Phys., 21, 1955 (1983)

[18] Galiotis C, Robinson IM, Young RJ, Smith BJE, Batchelder DN, Polym. Commun., 26, 354 (1985)

[19] Pradad K, Grubb DT, J. Appl. Polym. Sci., 41, 2189 (1990)

[20] Schaefer DJ, Schadt RJ, Gardner KH, Gabara V, Allen SR, English AD, Macromolecules, 28(4), 1152 (1995)

[21] Landgraf RW, Achievement of High Fatigue Resistance in Metals and Alloys, ASTM STP-467, pp. 3 (1970)

[22] Hertzberg W, Deformation and Frature Mechanics of Engineering Materials, John Wiley and Sons, pp. 457

[23] Backer HG, Structural Mechanics of Fibers, Yarns and Fabrics, Wiley-Interscience, Vol. 1, Chapter 2, 3, 4

[24] Hertzberg RW, Manson JA, Skibo MD, Polym. Eng. Sci., 15(4), 252 (1975)

[25] Miner MA, J. Appl. Mech., A, 160 (1945)

[26] Hertzberg RW, Deformation and Frature Mechanics of Engineering Materials, John Wiley and Sons, pp. 426

[27] Morgan RJ, Pruneda CO, Steele WJ, J. Polym. Sci. B: Polym. Phys., 21, 1757 (1982)

[28] Northolt MG, van Aartson JJ, J. Polym. Sci. C: Polym. Lett., 11, 333 (1973)

[29] Hosemann R, Wilke W, Faserforsch Textiledmik, 15, 521 (1964)