TY - CHAP
T1 - A generalized-plasticity-based model for sandstone considering time-dependent behavior
AU - Weng, Meng Chia
N1 - Publisher Copyright:
© 2013 by Taylor & Francis Group, LLC.
PY - 2013/5/17
Y1 - 2013/5/17
N2 - Based on the concept of generalized plasticity, this study proposes a constitutive model for describing the time-dependent behavior and wetting deterioration of sandstone. The proposed model (1) exhibits nonlinear elasticity under hydrostatic and shear loading; (2) follows the associated flow rule for viscoplastic deformation; (3) adopts a creep modulus that varies with stress ratios; and (4) considers the primary and secondary creep behaviors of rock. This model requires 13 material parameters, comprising 3 for elasticity, 7 for plasticity, and 3 for creep. The proposed model is first validated by comparing the triaxial tests of sandstone under different hydrostatic stress and cyclic loading conditions. Then, it is versatile in simulating the time-dependent behavior through a series of multi-staged creep tests.
AB - Based on the concept of generalized plasticity, this study proposes a constitutive model for describing the time-dependent behavior and wetting deterioration of sandstone. The proposed model (1) exhibits nonlinear elasticity under hydrostatic and shear loading; (2) follows the associated flow rule for viscoplastic deformation; (3) adopts a creep modulus that varies with stress ratios; and (4) considers the primary and secondary creep behaviors of rock. This model requires 13 material parameters, comprising 3 for elasticity, 7 for plasticity, and 3 for creep. The proposed model is first validated by comparing the triaxial tests of sandstone under different hydrostatic stress and cyclic loading conditions. Then, it is versatile in simulating the time-dependent behavior through a series of multi-staged creep tests.
UR - http://www.scopus.com/inward/record.url?scp=84880084621&partnerID=8YFLogxK
U2 - 10.1201/b14917-57
DO - 10.1201/b14917-57
M3 - Chapter
AN - SCOPUS:84880084621
SN - 9781138000575
T3 - Rock Characterisation, Modelling and Engineering Design Methods - Proceedings of the 3rd ISRM SINOROCK 2013 Symposium
SP - 317
EP - 322
BT - Rock Characterisation, Modelling and Engineering Design Methods - Proceedings of the 3rd ISRM SINOROCK 2013 Symposium
PB - CRC Press
T2 - 3rd ISRM Symposium on Rock Characterisation, Modelling and Engineering Design Methods, SINOROCK 2013
Y2 - 18 June 2013 through 20 June 2013
ER -