Elastoplastic Constitutive Equation with Tangential Stress Rate Effect and Its Application to Soils.

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  • HASHIGUCHI Koichi
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Kyushu University
  • TSUTSUMI Seiichiro
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Kyushu University
  • OKAYASU Takashi
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Kyushu University
  • SAITOH Koshiro
    The Japanese Society of Agricultural Machinery Faculty of Agriculture, Kyushu University

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Other Title
  • 接線応力速度を考慮した弾塑性構成式の提案および地盤材料への適用
  • セッセン オウリョク ソクド オ コウリョ シタ ダン ソセイ コウセイシキ ノ テイアン オヨビ ジバン ザイリョウ エ ノ テキヨウ

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Abstract

The plastic instability phenomenon exhibiting the bifurcation of deformation mode and the localization of deformation is observed in a large plastic deformation process leading a material to failure. The prediction of this phenomenon is of importance for the development of engineering in practice, e. g. the mechanical design of machinery, civil and architectural structures. In this article the novel elastoplastic constitutive equation is first proposed, which is applicable to the analysis of not only monotonic but also cyclic loading behavior and is capable of describing the inelastic deformation caused by the stress rate tangential to the yield surface. Based on it, the constitutive equation of soils is formulated.

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