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14.11.2018 | Original Paper | Ausgabe 3/2019 Open Access

Rock Mechanics and Rock Engineering 3/2019

On the Inelastic Mechanical Behavior of Granite: Study Based on Quasi-oedometric and Indentation Tests

Zeitschrift:
Rock Mechanics and Rock Engineering > Ausgabe 3/2019
Autoren:
H. Shariati, M. Saadati, A. Bouterf, K. Weddfelt, P.L. Larsson, F. Hild
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Abstract

The inelastic behavior of Bohus granite is investigated based on experimental and numerical results. The yield surface and related dilation angle are determined based on quasi-oedometric tests performed in an earlier work. It is shown how to obtain the yield surface and dilation angle from this test for hydrostatic pressure levels up to 750 MPa. In the constitutive modeling, a Drucker-Prager law is employed together with a variable dilation angle. The constitutive model is first applied to simulate the quasi-oedometric test and the stress and strain fields are obtained. Furthermore, the validation of the model is investigated by simulation of the spherical indentation test. The results are compared with corresponding experimental data and a good agreement is found.

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