Bifurcation Analysis in Sands under True Triaxial Conditions with Coaxial and Noncoaxial Plastic Flow Rules

Veiskarami, Mehdi; Tamizdoust, Mohammadreza Mir

doi:10.1061/(asce)em.1943-7889.0001344

Cited by 12 publications

(3 citation statements)

References 45 publications

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“…It has been found that the constitutive models based on classical plasticity theory often provide poor predictions of the onset of shear band. Therefore, efforts have been made to improve the prediction capability by incorporating more versatile elastoplastic constitutive models, including nonnormality, noncoaxial, sub‐loading surface model and other extensions, 1,18–27 of which the noncoaxial plastic models may be the most successful 20–23,27 …”

Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Zhang

Wang²,

et al. 2021

Num Anal Meth Geomechanics

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Predicting the onset of shear band is of significance in understanding the failure of geomaterials. The prediction accuracy is dictated by the constitutive model used for the description of the pre‐bifurcation behaviour. In this study, we first modify a recently proposed hypoplastic constitutive model by incorporating a general strength criterion and a stiffness function. We proceed to consider the onset of shear band in sand under true triaxial conditions. We demonstrate that our analyses capture the pre‐bifurcation stress–strain relationship at different values of intermediate principal stress and predict fairly well the onset of shear band. The acoustic tensor criterion generally adopted in elastoplastic approaches is inadequate for hypoplastic approaches. No special non‐coaxial treatment is required for the present approach to yield a reasonable variation trend of bifurcation strain with intermediate principal stress ratio b.

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Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Zhang

Wang²,

et al. 2021

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…It has been found that the constitutive models based on classical plasticity theory often provide poor predictions of the onset of shear band. Therefore, efforts have been made to improve the prediction capability by incorporating more versatile elastoplastic constitutive models, including nonnormality, noncoaxial, sub-loading surface model and other extensions, 1,[18][19][20][21][22][23][24][25][26][27] of which the noncoaxial plastic models may be the most successful. [20][21][22][23]27 Hypoplastic constitutive models, as an alternative to elastoplastic models, have aroused increasing interests recently.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, efforts have been made to improve the prediction capability by incorporating more versatile elastoplastic constitutive models, including nonnormality, noncoaxial, sub-loading surface model and other extensions, 1,[18][19][20][21][22][23][24][25][26][27] of which the noncoaxial plastic models may be the most successful. [20][21][22][23]27 Hypoplastic constitutive models, as an alternative to elastoplastic models, have aroused increasing interests recently. [28][29][30][31][32][33][34][35][36][37][38][39][40][41] Some beneficial features of hypoplastic constitutive models include simple formulation, fewer parameters, non-linear behaviour before failure and smooth transition from contractancy to dilatancy.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Li¹,

Wang²,

Wu³

et al. 2021

Preprint

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Predicting the onset of shear band is of significance in understanding the failureof geomaterials. The prediction accuracy is dictated by the constitutive modelused for the description of the pre-bifurcation behaviour. In this study, we firstmodify a recently proposed hypoplastic constitutive model by incorporating ageneral strength criterion and a stiffness function. We proceed to consider theonset of shear band in sand under true triaxial conditions. We demonstrate thatour analyses capture the pre-bifurcation stress–strain relationship at differentvalues of intermediate principal stress and predict fairly well the onset ofshear band. The acoustic tensor criterion generally adopted in elastoplasticapproaches is inadequate for hypoplastic approaches. No special non-coaxialtreatment is required for the present approach to yield a reasonable variationtrend of bifurcation strain with intermediate principal stress ratio 𝑏.

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Load–Displacement Behavior of Driven Piles in Sand Using CPT-Based Stress and Strain Fields

2018

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Bifurcation Analysis in Sands under True Triaxial Conditions with Coaxial and Noncoaxial Plastic Flow Rules

Cited by 12 publications

References 45 publications

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity

Load–Displacement Behavior of Driven Piles in Sand Using CPT-Based Stress and Strain Fields

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