応用力学論文集
Online ISSN : 1884-832X
Print ISSN : 1345-9139
ISSN-L : 1345-9139
拡張接線下負荷面モデルに基づく土の非比例負荷挙動の予測
瀬戸内 秀規橋口 公一小宮 康明
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ジャーナル フリー

2005 年 8 巻 p. 385-393

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In nonproportional loading process, the traditional elastoplasticonstitutive model predicts the unrealistically stiff mechanical response leading to an excessively high critical load. The new concept of the tangential stress rate relaxation, called the tangential relaxation, is proposed by Hashiguchi, in which the direction of the tangential strain rate induced by the tangential stress rate has the components not only tangential but also outward-normal to the subloading surface. In this paper, the validity of the concept for the prediction of the deformation behavior of sand is evaluated by simulating the directional dependency of the inelastic strain increment on the stress increment directions, i.e. vertex effect, and also the inelastic deformation during the rotation of the principal stress axes direction under the constant mean stress and deviatoric stress, i. e. non-coaxiality.

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