ゴムのせん断弾性係数とその測り方

概要

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The authors have produced for trial a tester with which shear modulus G, one of the important characteristics of rubber, could be measured in conformity with the strict theory of elasticity.If we call the value of shear modulus, measured with this tester, as GSS, it has almost one-to-one correspondence to spring hardness Hs, Comparing Gss with Gs, shear modulus calculated from tensile stress at small extension, the former is a little larger than the latter when a specimen is soft. But the harder a testpiece is, the larger the difference of two values. The relation between Yerzley′s dynamic modulus Edvn and Gss is almost linear except in a case of soft rubber. The ratio of dynamic modulus G1, obtained by resonance method, to Gss is 1.06-1.10.Also it is investigated by the new tester how the value of Gss varies when the measurement is done with piled up specimen.
日本ゴム協会の論文