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作者:

Wang, Guosheng (Wang, Guosheng.) | Li, Zehua (Li, Zehua.) | Liang, Jingyu (Liang, Jingyu.) | Lu, Dechun (Lu, Dechun.) | Du, Xiuli (Du, Xiuli.)

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摘要:

The state-dependent deformation behavior of sand is reinterpreted from the perspective of strain increment magnitude and direction by analyzing the existing test data. A state-dependent non-orthogonal elastoplastic constitutive model for sand is established by incorporating the state variable into plastic strain increment magnitude and direction, respectively. For the magnitude of plastic strain increment, an S-type isotropic compression hardening rule applicable in large stress ranges is proposed, which is extended into a new hardening parameter for general stress states. Furthermore, the state variable is introduced into the newly proposed hardening parameter to consider the state dependence. On the other hand, the non-orthogonal plastic flow rule is employed to determine the plastic strain increment direction. To consider its state dependence, the relationship between the state variable and the parameter controlling the plastic flow direction is established. The comparison with the test results of four types of sand demonstrates that the proposed model can reasonably capture the state-dependent deformation behaviors of plastic strain increment magnitude and direction of sand.

关键词:

Non -orthogonal plastic flow rule Hardening parameter State dependence Sand Constitutive model

作者机构:

  • [ 1 ] [Wang, Guosheng]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Zehua]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Lu, Dechun]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Liang, Jingyu]Beijing Univ Civil Engn & Architecture, Sch Civil & Transportat Engn, Beijing 102616, Peoples R China

通讯作者信息:

  • [Liang, Jingyu]Beijing Univ Civil Engn & Architecture, Sch Civil & Transportat Engn, Beijing 102616, Peoples R China;;

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来源 :

COMPUTERS AND GEOTECHNICS

ISSN: 0266-352X

年份: 2023

卷: 166

5 . 3 0 0

JCR@2022

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