1503 バラスト材の繰り返し変形解析におけるcycle-jump型弾塑性構成モデルの適用(軌道構造,SS2:メンテナンス,コストダウン,第18回交通・物流部門大会(TRANSLOG2009))

概要

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The cyclic deformation of railway ballast is simulated using the cycle-jump type constitutive model. The cycle-jump type model is based on the overstress formulation. The reversible response is represented by a pressure-dependent, hypoelastic model. The criterion of generation of progressive plastic deformation, the shakedown stress, is assumed to depend the accumulative plastic strain. The present model is used to simulate the cyclic triaxial tests of railway ballast. The accuracy of the simulation results depends on the convergence of the strain accumulation, while the larger value of the cycle increment ΔN enables us to reduce the computational work.
一般社団法人日本機械学会の論文
2009-12-02