A new approach for the quasi-plane strain-softening problem of cylindrical cavity expansion based on Cam-Clay model

作者：Zou Jin-feng^*; Du Jia-min

来源：Journal of Mechanical Science and Technology, 2017, 31(3): 1315-1320.

DOI：10.1007/s12206-017-0230-1

• Quasi-plane strain problem
• Plastic strain
• Intermediated principal stress
• 3-D plastic potential function
• Deformation dependent

This paper focuses on the quasi-plane strain-softening problem of cylindrical cavity expanding in Cam-Clay soil mass. The quasi-plane strain-softening problem is defined based on the assumptions that the initial axial total strain is a non-zero constant and the axial plastic strain is not zero. A new approach for the major, intermediate, and minor principal strains are proposed based on the associated flow rule, 3-D plastic potential function, Hooke's law, stress equilibrium equation and Cam-Clay model. The correctness of the proposed approach is validated by the results in Cao and Teh. Parametric studies were performed to investigate the influences of the intermediate principal stress on the radial and circumferential stresses and the radial displacement, respectively.

• 出版日期2017-3
• 单位中南大学