905 発電機器用繊維強化ゴムを対象とした直交異方性超弾性モデルの提案(OS11-(2)オーガナイズドセッション《発電機器の材料・構造解析と評価》)

概要

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In this paper, we propose of an orthotropic hyperelastic model for the fiber-reinforced rubber seals used in electric generators. The fiber-reinforced rubber is composed of rubber matrix material that is reinforced by two families of fibers. Its mechanical properties is anisotropic that depend on directions of two fiber families. We modify the Holzapfel model as applying different properties to the warp fiber and weft fiber. Moreover, terms to consider shear deformation were added to the strain energy function. In the function, the energy of the fiber families was represented by exponential functions of invariants of stretch and shear deformation in fiber families. In order to identify material parameter of proposed model, uniaxial tensile test result of the fiber-reinforced rubber were approximated by the nonlinear least squares method.
2010-08-27