Improved shape hardening function for bounding surface model for cohesive soils

Leal, Andrés Nieto; Kaliakin, Victor N.

doi:10.1016/j.jrmge.2013.12.006

Cited by 6 publications

(2 citation statements)

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“…The quantity

Ĥ

denotes a proper scalar shape hardening function of the state. The shape hardening function associated with the GBSM was chosen after a thorough review of past modeling practices; the selected functional form simplified earlier versions of the BS model without compromising the GBSM's predictive capabilities.…”

Section: Brief Overview Of Gbsmmentioning

confidence: 99%

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Improved rotational hardening rule for cohesive soils and definition of inherent anisotropy

Leal

Kaliakin

Mashayekhi

2017

Num Anal Meth Geomechanics

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Summary Improved, microfabric‐inspired rotational hardening rules for the plastic potential and bounding surfaces associated with the generalized bounding surface model for cohesive soils are presented. These hardening rules include 2 new functions, fη and fI0, that improve the simulation of anisotropically consolidated cohesive soils. Three model parameters are associated with the improved hardening rules. A detailed procedure for obtaining suitable values for these parameters is presented. The first 2 parameters affect the simulation of constant stress ratio loading where, because of the presence of fη, the third parameter is inactive. The second new function, fI0, accelerates the rotation of the plastic potential and bounding surfaces during shearing, which is particularly important for overconsolidated soils tested in extension. This paper also describes the proper manner in which to define the inherent anisotropy. This seemingly straightforward test has rarely been discussed in sufficient detail.

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“…The quantity

Ĥ

Section: Brief Overview Of Gbsmmentioning

confidence: 99%

“…Additional details pertaining to each of the aforementioned quantities have been discussed elsewhere. () This paper describes the improved “rotational hardening rules” for the PPS and BS associated with the GBSM for cohesive soils.…”

Section: Brief Overview Of Gbsmmentioning

confidence: 99%