ゴム状態におけるゴム状高分子の力学的挙動と破壊について

概要

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Recent developments in the research on mechanical behavior of rubberlike polymers is introduced at first and the functional form of the strain energy density function, W, is discussed. The gradients ∂W/∂I_1 and ∂W/∂I_2 for vulcanized rubbers are in general functions of both I_1 and I_2 but almost constant at relatively large deformation. In the small deformation region, the change of their value with deformation is very steep and, in particular, ∂W/∂I_2 takes a negative value in its region. It is estimated that ∂W/∂I_1 corresponds to the entropy elasticity and ∂W/∂I_2 to the energy caused by intermolecular forces. Second, the failure property of rubbery polymers is introduced and the failure criterion is proposed. Lastly, a statistical approach to the analysis of the failure process is introduced and shown the relation between creep failure and the failure during the constant-rate tensile process is shown.
社団法人日本材料学会の論文
1974-01-15