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Nature of fatigue behavior and effect of flaw size in polystyrene
Author(s) -
McMaster A. D.,
Morrow D. R.,
Sauer J. A.
Publication year - 1974
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.760141112
Subject(s) - materials science , polystyrene , composite material , scanning electron microscope , notching , fracture (geology) , compression (physics) , stress (linguistics) , tension (geology) , cyclic stress , weibull distribution , mathematics , polymer , philosophy , metallurgy , statistics , linguistics
Fatigue tests under reversed tension‐compression have been made on polystyrene specimens in both the unnotched and notched condition. For the notched specimens subject to a stress amplitude of 2500 psi, the log of the fatigue life was found to be a linear function of the log of the notch size. From the data, it was possible to determine an inherent flaw size for polystyrene subject to alternating loading and this value is compared to corresponding values obtained from static tests. Fracture surfaces were examined by scanning electron microscopy and the changes produced by notching are discussed.