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The strain response of plastics to complex stress histories
Author(s) -
Turner S.
Publication year - 1966
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.760060406
Subject(s) - viscoelasticity , creep , materials science , stress (linguistics) , function (biology) , simple (philosophy) , forensic engineering , structural engineering , mechanics , composite material , engineering , physics , philosophy , linguistics , epistemology , evolutionary biology , biology
Whereas the creep behaviour of plastics is conventionally studied by the application of a simple step‐function of stress, the stress conditions encountered in service are often much more complicated. The response of a liner viscoelastic material to a complex stess history can be calculated from the step‐function response, but this is not so for plastics which are non‐liner viscoelastic. The paper considers this from a mainly experimental viewpoint and underlines the general inadequacy of the current continuum echanical approach. The sections on recovery and intermittent stressing are of particular practical importance since it is under these conditions that plastic display particulary useful characteristics.