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Volume 39 Issue 6
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DU Xiu-li, HUANG Jing-qi, JIN Liu, ZHAO Mi. Three-dimension elastic-plastic damage constitutive model for intact rock[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(6): 978-985. DOI: 10.11779/CJGE201706002
Citation: DU Xiu-li, HUANG Jing-qi, JIN Liu, ZHAO Mi. Three-dimension elastic-plastic damage constitutive model for intact rock[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(6): 978-985. DOI: 10.11779/CJGE201706002
shu

Three-dimension elastic-plastic damage constitutive model for intact rock

  • 1. The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China;
    2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China

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  • Received Date: March 16, 2016
  • Published Date: June 24, 2017
    Graphical Abstract
    • Abstract
  • Based on the concept of true stress and the strain equivalence hypothesis, a three-dimension elastic-plastic damage constitutive model for rock is established. Combining the nonlinear unified strength model as the yield function and the equivalent plastic shear strain as the hardening parameter considering the effect of stress level, the formulation of elastic-plastic behavior of rock is deduced in the true stress space. As in the normal stress space, the damage evaluation law is given by considering the effect of confining pressure. The present theoretical results and the test data are compared. It is indicated that the proposed constitutive model describes the strength and deformation behaviors and the strain softening behaviors of rock. Furthermore, the model can be employed to simulate rock engineering structures under multi-dimensional nonlinear stress, providing a basic reference for structural design and analysis.
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    • References (29)
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