破断スペクトルと粘弾性的性質との関係

概要

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Using a mechanical model of 12 material parameters, which had been proposed recently, the empirical rule found by Grosch and Harwood for the correlation between the energy at break and the energy loss at break in various vulcanized rubber samples in uniaxial extension measurements was first rewritten in the form, 6C1•f1(λb, λbmax)+Af2(λb, λbmax, m)=K•[Af3(λb, λbmax, m)]2/3Here C1, λbmax, m and A are the material parameters, and λb and K stand for the strain-at-break and the proportionality factor, respectively. f1, f2 and f3 are the functions of those respectively parenthesized in the equation.This equation was then simplified to give an approximate relationship such that(λbmax-λb)/m≅blogaTwhere logaT is the shift factor as usual. b is a factor independent of temperature and was found rather insensitive to the change in the values of λbmax and C1 but fairly sensitive to the change in m within the ranges examined.The experimental data on various rubber samples obtained in this study confirmed well the relations herein derived.
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