Fatigue behaviour of plastics is discussed by means of creep curves and the phenomenon of self heating. Amorphous thermoplastics such as polymethyl methacrylate (PMMA) and rigid suspension polyvinyl chloride (S-PVC) and partially crystalline polypropylene (PP) are examples. In practice, the first formation of crazes and microcracks and their defor mation have to be taken as a limit for mechanical loading rather than the ultimate failure.
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References
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E. Alf., Dissertation, TH Aachen.
2.
K. V. Gotham, S. Turner, 30th Annual Conference SPE, 15. — 18.5, 1972, Part two, p. 539-544.
