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Evaluating the fatigue resistance of notched specimens of polyethylene
Author(s) -
Zhou Y.,
Brown N.
Publication year - 1993
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760332107
Subject(s) - materials science , composite material , polyethylene , stress (linguistics) , stress intensity factor , amplitude , intensity (physics) , strain (injury) , structural engineering , fracture mechanics , optics , philosophy , linguistics , physics , medicine , engineering
The fatigue life of a linear low density polyethylene was measured as a function of stress, notch depth., and temperature under plane strain conditions. The fatigue life was precisely related to the stress intensity. The temperature dependence of the fatigue life corresponded to an activation energy of 72.5 KJ which was independent of stress level. A general equation for the fatigue lifetime was proposed for polyethylenes in terms of the material parameters, the mechanical parameters such as stress intensity, stress amplitude, frequency, and waveform.