The fatigue lives (i.e., the number of cycles to failure) of short fiber reinforced thermoplastic matrix composites were investigated. First, S-N curves were generated at stress ratios of R = 0 and R = -1 for short glass fiber reinforced Copolyamide coupons with 0° (30% or 50% fiber content by weight), 45° (50% fiber content) and 90° (30% or 50% fiber content) fiber orientations. Second, these S-N curves were compared to data reported in the literature for a wide range of short glass and short carbon fiber reinforced thermoplastics materials. On the basis of these comparisons, all available data were “collapsed” on two S-N curves, one for R = 0 and one for R = -1.
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References
1.
1. A. Zago, G.S. Springer and M. Quaresimin, “Cumulative Damage of Short Glass Fiber Reinforced Thermoplastics,”Journal of Reinforced Plastics and Composites, 20(7):596-610.
2.
2. A. Zago and G.S. Springer, “Fatigue Lives of Short Fiber Reinforced Thermoplastics Parts,”Journal of Reinforced Plastics and Composites, 20(7):611-620.
3.
3. Annual Book of ASTM Standards, “Plastics (I): D256-D2343, D695-96: Standard Test Method for Compressive Properties of Rigid Plastics,” vol. 08.01, ASTM—American Society for Testing and Materials, 1999.
4.
4. C. Lipson and N.J. Sheth, Statistical Design and Analysis of Engineering Experiments, McGraw-Hill, 1973.
5.
5. J.F. Mandell, D.D. Huang and F.J. McGarry, “Fatigue of Glass and Carbon Fiber Reinforced Engineering Thermoplastics,” in 35th Annual Technical Conference, Reinforced Plastics/Composites Industry, pp. 1-11, SPI—Society of Plastics Industry, 1980.
6.
6. D.W. Adkins and R.G. Kander, “Fatigue Performance of Glass Reinforced Thermoplastics,”Proceedings of the Fourth Annual Conference on Advanced Composites, pp. 437-445, ASM International, 1988.
7.
7. E. Jinen, “Accumulated Strain in Low Cycle Fatigue of Short Carbon-Fibre Reinforced Nylon 6,”Journal of Material Science, vol. 21, pp. 435-443, 1986.
8.
8. J.J. Horst, “Influence of Fibre Orientation on Fatigue of Short Glassfibre Reinforced Thermoplastics,” PhD Thesis, Delft University, Delft, Holland, 1992.
9.
9. N. Jia and V.A. Kagan, “Effects of Time and Temperature on the Tension-Tension Fatigue Behavior of Short Fiber Reinforced Polyamides,”Polymer Composites, vol. 19, pp. 408-414, 1998.
10.
10. H. Hamada, M. Hiragushi and K. Tomari, “Effect of Surface Treatment on Fatigue Properties of Glass Fiber Reinforced Injection Molded Parts,” in Proceedings of the 53rd Annual Technical Conference, vol. 3, pp. 3981-3985, SPE—Society of Plastics Engineers, 1995.
11.
11. J.F. Mandell, F.J. McGarry, D.D. Huang and C.G. Li, “Some Effects of Matrix and Interface Properties on the Fatigue of Short Fiber-Reinforced Thermoplastics,”Polymer Composites, vol. 4, pp. 32-39, 1983.
12.
12. J.F. Mandell, F.J. McGarry and C. Li, “Fatigue Crack Growth and Lifetime Trends in Injection Molded Reinforced Thermoplastics,” in High Modulus Fiber Composites in Ground Transportation and High Volume Applications, ASTM-STP 873, pp. 36-50, American Society for Testing and Materials, 1985.
13.
13. J.C. Malzahn and J.M. Schultz, “Tension-Tension and Compression-Compression Fatigue Behavior of an Injection-Molded Short-Glass-Fiber/Poly(Ethylene Terephthalate) Composite,”Composites Science and Technology, vol. 27, pp. 253-289, 1986.
14.
14. S. Barré and M.L. Benzeggagh, “On the Use of Acoustic-Emission to Investigate Damage Mechanisms in Glass-Fiber-Reinforced Polypropylene,”Composites Science and Technology, vol. 52, pp. 369-376, 1994.
15.
15. D. Grove, H. Kim, D. Cooper and C. Ellis, “Longitudinal Fatigue Behavior of Long and Short Glass Reinforced, Injection Moldable, Polypropylene Composites,” in Proceedings of the 26th International SAMPE Technical Conference, vol. 26, pp. 281-295, 1994.
16.
16. E.D. Silverman, “Material Properties of Unreinforced and Short Glass Reinforced Injection-Molded PVC Composites,” in 40th Annual Conference, Reinforced Plastics/Composite Institute, pp. 1-5, SPI—Society of Plastics Industry, 1985.
17.
17. C.P. Hoppel, “The Effects of Tension-Tension Fatigue on the Mechanical Behavior of Short Fiber Reinforced Thermoplastics,” in Proceedings of the 7th Technical Conference of American Society for Composites, pp. 509-518, ASC—American Society for Composites, Technomic Publishing Co., Inc., 1992.
18.
18. Annual Book of ASTM Standards, “High Modulus Fibers & Composites. D3410/D3410M-95: Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials with Unsupported Gage Section by Shear Loading,” vol. 15.03, ASTM—American Society for Testing and Materials, 1999.
