›› 2010, Vol. 31 ›› Issue (8): 2425-2434.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental research on elastoplastic coupling character of marble

ZHANG Kai1, ZHOU Hui1, FENG Xia-ting1, SHAO Jian-fu2,YANG Yan-shuang1, ZHANG Yuan-gang3   

  1. 1 State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics， Chinese Academy of Sciences，Wuhan 430071, China; 2 LML, Universite des Science et Technologie de Lille, Lille 59650, France ;3 Yanzhou Coal Mining Company Limited, Zoucheng, Shandong 273500, China
  • Received:2010-02-28 Online:2010-08-10 Published:2010-08-30

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Abstract:

A lot of research work shows that when rock undergoes plastic deformation, its elastic parameters vary. In order to study the elastoplastic coupling characteristic of rock, cyclic loading experiments on two kinds of marbles are carried out. The experiments show that comparing with conventional triaxial experiments, cyclic loading experiments do not influence the deformation and strength of the rocks. The elastic parameters obviously vary with plastic deformation. When taking the elastoplastic coupling character into consideration, bulk modulus and shear modulus are more suitable to be selected as elastic parameters than elastic modulus and Poisson ratio. The variation of the parameters of strength with plastic internal variable is also obtained under the hypothesis of Mohr-Coulomb yield criterion. The results can provide experimental basis for the furthur study on the elastoplastic coupling constitutive model of rock.

Key words: marble, elastoplastic coupling, cyclic loading, experimental research

CLC Number: 

  • TU 458
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