### Abstract

The present paper presents a new hypoplastic constitutive model to describe the behaviour of a cohesionless and initially transversely isotropic granular material. State changes are described using a nonlinear tensor-valued function depending on the current void ratio, the Cauchy stress, a structure tensor involving anisotropy effects and on the rate of deformation. The evolution of the anisotropic material parameters are related to the loading history. For large monotonic shearing the initial transversely isotropic property gradually vanishes and a stationary state can be reached which is independent of the initial state. It is shown that for plane strain compression the peak friction angle strongly depends on the current void ratio, the mean pressure and the orientation of the transversely isotropic plane. The possibility of a spontaneous strain localization in the form of a shear band is investigated and the influence of the state parameters on the shear band inclination is discussed.

Original language | English |
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Title of host publication | Numerical models in geomechanics. Proceedings of the 7th international symposium, Graz, September 1999. |

Editors | G. N. Pande, S. Pietruszczak, H. F. Schweiger, G.N. Pande, S. Pietruszczak, H.F. Schweiger |

Pages | 121-126 |

Number of pages | 6 |

Publication status | Published - 1999 |

Event | International Symposium on Numerical Models in Geomechanics - Graz, Austria Duration: 1 Sep 1999 → 3 Sep 1999 |

### Conference

Conference | International Symposium on Numerical Models in Geomechanics |
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Country | Austria |

City | Graz |

Period | 1/09/99 → 3/09/99 |

### Fingerprint

### ASJC Scopus subject areas

- Earth and Planetary Sciences(all)
- Environmental Science(all)

### Cite this

*Numerical models in geomechanics. Proceedings of the 7th international symposium, Graz, September 1999.*(pp. 121-126)

**Effect of initial anisotropy on shear banding in granular materials.** / Bauer, E.; Huang, W.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review

*Numerical models in geomechanics. Proceedings of the 7th international symposium, Graz, September 1999..*pp. 121-126, International Symposium on Numerical Models in Geomechanics, Graz, Austria, 1/09/99.

}

TY - GEN

T1 - Effect of initial anisotropy on shear banding in granular materials

AU - Bauer, E.

AU - Huang, W.

PY - 1999

Y1 - 1999

N2 - The present paper presents a new hypoplastic constitutive model to describe the behaviour of a cohesionless and initially transversely isotropic granular material. State changes are described using a nonlinear tensor-valued function depending on the current void ratio, the Cauchy stress, a structure tensor involving anisotropy effects and on the rate of deformation. The evolution of the anisotropic material parameters are related to the loading history. For large monotonic shearing the initial transversely isotropic property gradually vanishes and a stationary state can be reached which is independent of the initial state. It is shown that for plane strain compression the peak friction angle strongly depends on the current void ratio, the mean pressure and the orientation of the transversely isotropic plane. The possibility of a spontaneous strain localization in the form of a shear band is investigated and the influence of the state parameters on the shear band inclination is discussed.

AB - The present paper presents a new hypoplastic constitutive model to describe the behaviour of a cohesionless and initially transversely isotropic granular material. State changes are described using a nonlinear tensor-valued function depending on the current void ratio, the Cauchy stress, a structure tensor involving anisotropy effects and on the rate of deformation. The evolution of the anisotropic material parameters are related to the loading history. For large monotonic shearing the initial transversely isotropic property gradually vanishes and a stationary state can be reached which is independent of the initial state. It is shown that for plane strain compression the peak friction angle strongly depends on the current void ratio, the mean pressure and the orientation of the transversely isotropic plane. The possibility of a spontaneous strain localization in the form of a shear band is investigated and the influence of the state parameters on the shear band inclination is discussed.

UR - http://www.scopus.com/inward/record.url?scp=0033404882&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9058090957

SP - 121

EP - 126

BT - Numerical models in geomechanics. Proceedings of the 7th international symposium, Graz, September 1999.

A2 - Pande, G. N.

A2 - Pietruszczak, S.

A2 - Schweiger, H. F.

A2 - Pande, G.N.

A2 - Pietruszczak, S.

A2 - Schweiger, H.F.

ER -