Superloading yield surface concept for highly structured soil behavior

https://www.jstage.jst.go.jp/article/sandf1972/27/3/27_3_71/_pdf

A determination procedure of input parameters in elasto-viscoplastic finite element analysis

https://www.jstage.jst.go.jp/article/sandf1972/22/3/22_3_77/_pdf

Cyclic strength and deformation of normally consolidated clay

A generalized elastoplastic constitutive model for clay in three-dimensional stresses

“Superloading surface concept” is newly developed for the description of elasto-plastic behavior of highly structured soils. The superloading surface, which is similar in shape to the original Cam-clay yield surface, is located above the Cam-clay and the size ratio between two yield surfaces gives the degree of the structure of soil skeleton. The evolution law of the size ratio describes the decay of the structure as plastic deformation proceeds, and the superloading surface falls exactly on the Cam-clay yield surface at the end of the completely remolded state. When the soil is reloaded after elastic unloading, the elasto-plastic behavior of the soil is described by the Hashiguchi’s subloading surface, which is also similar in shape to the superloading surface. The size ratio between super and subloading surfaces gives the OCR.

Super Loading Yield Surface Concept for the Saturated Structured Soils

Analysis of deformations of soils based on the theory of plasticity and its application to settlement of embankments

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Analysis of deformations of soils based on the theory of plasticity and its application to settlement of embankments