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Stress‐strain behavior of irradiated polyurethane elastomers
Author(s) -
Fritz E. G.,
Johnson Peggy M.
Publication year - 1963
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.1963.070070422
Subject(s) - materials science , elastomer , polyurethane , irradiation , composite material , strain (injury) , modulus , stress (linguistics) , physics , nuclear physics , medicine , linguistics , philosophy
The applicability of the Martin‐Roth‐Stiehler stress‐strain relationship to a number of reactor‐irradiated (gamma‐ray dose range 0–1.9 × 10 10 ergs/g. in carbon) polyurethane elastomers has been demonstrated. For each level of dose and irradiation temperature, the stress‐strain values showed remarkably good agreement with the behavior predicted by this relationship, thus permitting a realistic characterization of the stress‐strain curves up to extension ratios of 3 by two parameters: the tangent modulus E 0 and a coefficient K . While the available data did not justify conclusive inferences regarding the explicit nature of the functions E 0 ( D ) and K ( D ), it appears from this analysis that E 0 varies exponentially with dose D and that K is a slowly varying function of dose.