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The fracture mechanics of polymers at high rates
Author(s) -
Casiraghi T.
Publication year - 1978
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.760181016
Subject(s) - materials science , fracture toughness , fracture mechanics , stress intensity factor , composite material , fracture (geology) , polymer , work (physics) , toughness , stress (linguistics) , simple (philosophy) , mechanics , thermodynamics , linguistics , philosophy , physics , epistemology
Abstract Instrumented pendula have been applied to investigate the fracture toughness of some polymeric materials—homopolymers and composites—by fracture mechanics. The method is simple, and can be easily used for routine testing or research work. The load transducer is such that it allows the achievement of very accurate stress‐time curves. Data are reported which clearly show the dependence of K c on speed, temperature, and molecular weight. K c is the critical stress intensity factor. It has also been found that the K c experimental values can be correlated with a peculiar feature of the fracture surface for the determination of the intrinsic value of K c /1 by the use of both the Dugdale model and a simple graphic correlation.