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Evaluation of brittle failures of polyethylene by subjection to biaxial stress
Author(s) -
McFedries R.,
Brown W. E.,
McGarry F. J.
Publication year - 1962
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.760020230
Subject(s) - materials science , brittleness , composite material , stress (linguistics) , polyethylene , modulus , philosophy , linguistics
First and second order effects of density and melt index were found to be significant with stress level a significant factor in determining failure time using Maltese Cross shaped specimens. Stress and temperature had the greater influence on failure. Influence of temperature‐viscosity interaction is of concern along with transition in the mode of failure from ductile to brittle type. Reduction in the effect of melt index with increasing density is in accord with new theories on polyethylene crystal structure. It was also shown that higher modulus materials fail more rapidly.