Glass fiber reinforced plastics, fatigue

Lockwood, P. A., Dynamic fatigue of glass fiber reinforced plastics, fatigue and impact resistance of plastics, Proc. 4th Annual Plastics Conf, Eastern Michigan University, September, 1969, pp. 74-99. 

Fatigue of Glass-Fiber Reinforced Plastics (GRP). NOL rings of 6-inch outer diameter and 0.25-inch width were fabricated from 12 single... 

S V Kumar, S S Faza, H V S GangaRao and M A1 Megdad, Fatigue performance of concrete slabs with glass fiber reinforced plastic (RP) rebars , Proceedings 50th Annual Conference, Composites Institute, SPI, New York, 1995, Paper 21-C. 

Figure 3-70. A sequence of push-pull fatigue in unidirectional glass-fiber-reinforced plastics (TS polyester) by a microbuckling process.

The rate dependence of fatigue strength demands carefiil consideration of the potential for heat buildup in both the fatigue test and in service. Generally, since the buildup is a function of the viscous component of the material, the materials that tend toward viscous behavior will also display sensitivity to cyclic load frequency. Thus, TPs, particularly the crystalline polymers like polyethylene that are above their glass-transition temperatures, are expected to be more sensitive to the cyclic load rate, and highly crosslinked plastics or glass fiber reinforced TS plastics are much less sensitive to the frequency of load. 

Kagan, V. A., Palley, L, Nanjing, J. Plastics part design Low cycle fatigue strength of glass-fiber-reinforced polyethylene terephthalate (PET). J. Reinforced Plastics Compos. 23 (2004) 15, 1607-1614. 

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