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The essential work of plane stress ductile fracture of linear polyethylenes
Author(s) -
Mai Y.W.,
Cotterell B.,
Horlyck R.,
Vigna G.
Publication year - 1987
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.760271106
Subject(s) - materials science , tearing , fracture (geology) , composite material , tension (geology) , work (physics) , ligament , enhanced data rates for gsm evolution , stress (linguistics) , ultimate tensile strength , anatomy , thermodynamics , linguistics , philosophy , physics , computer science , medicine , telecommunications
The specific essential works of plane stress ductile tearing of several high‐ and ultrahigh‐molecular‐weight polyethylenes were obtained from deeply edge‐notched tension specimens, with either single or double notches, by extrapolating the straight line relationship between the total specific fracture work and ligament length to zero ligament. Provided the fracture morphologies of the torn ligament are not widely different, the specific essential work ( w e ) is a material property dependent on thickness but independent of specimen geometry. The specific essential fracture work also can be identified with J c the critical value of the J ‐integral along a contour immediately bordering the fracture process zone at the crack tip. There is good agreement between the experimental we values and theoretical J c estimates for these polyethylene materials.