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http://dx.doi.org/10.12989/gae.2017.12.3.347

A new approach for the cylindrical cavity expansion problem incorporating deformation dependent of intermediate principal stress  

Zou, Jin-Feng (School of Civil Engineering, Central South University)
Xia, Ming-yao (Central South University Railway Campus)
Publication Information
Geomechanics and Engineering / v.12, no.3, 2017 , pp. 347-360 More about this Journal
Abstract
The problem of cylindrical cavity expansion incorporating deformation dependent of intermediate principal stress in rock or soil mass is investigated in the paper. Assumptions that the initial axial total strain is a non-zero constant and the axial plastic strain is not zero are defined to obtain the numerical solution of strain which incorporates deformation-dependent intermediate principal stress. The numerical solution of plastic strains are achieved by the 3-D plastic potential functions based on the M-C and generalized H-B failure criteria, respectively. The intermediate principal stress is derived with the Hook's law and plastic strains. Solution of limited expansion pressure, stress and strain during cylindrical cavity expanding are given and the corresponding calculation approaches are also presented, which the axial stress and strain are incorporated. Validation of the proposed approach is conducted by the published results.
Keywords
quasi-plane strain-softening problem; intermediated principal stress; 3-D plastic potential function; deformation dependent; cylindrical cavity expansion;
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Times Cited By KSCI : 4  (Citation Analysis)
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