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The tensile fatigue behavior of para‐oriented aramid fibers and their fracture morphology
Author(s) -
Konopasek L.,
Hearle J. W. S.
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070211017
Subject(s) - aramid , ultimate tensile strength , materials science , composite material , kevlar , scanning electron microscope , fracture (geology) , fiber , morphology (biology) , tensile testing , fatigue limit , composite number , biology , genetics
Samples of Fiber B and PRD 49 which were the forerunners of current Kevlar aramid fibers were subject to a limited number of tensile tests and tensile fatigue tests in order to determine their fracture morphology. The fibers were examined by optical and scanning electron microscopy. Both tensile and fatigue failure occurs by axial splitting, with the fatigue splits being much longer. Compressive effects in snap‐back cause kink bands to form. The fatigue strength is only marginally less than the tensile strength.