›› 2008, Vol. 29 ›› Issue (6): 1446-1450.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of plasticity gradient volume element and start-up mechanism of strain localization

ZHAO Bing1－3, LI Ning3, ZHENG Ying-ren1   

  1. 1. Department of Architectural Engineering, Logistic Engineering University of PLA,Chongqing 400041,China; 2. School of Bridge and Structure Engineering, Changsha University of Science and Technology, Changsha 410076, China; 3. Institute of Geotechnical Engineering, Xi’an University of Technology, Xi?an 710048,China
  • Received:2006-09-11 Online:2008-06-10 Published:2013-07-15

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Abstract: The behaviors of geomaterials before destroy can be reflected by the representative volume element; but when the high strain gradient occurs (such as the strain localization occurs), the representative volume element in which the strain and stress ate nonlinear, cannot reflect the mechanical character of geomaterials entirely. A plasticity gradient volume element (PGVE) which can describe the local deformation is proposed. The start-up mechanism of strain localization is analyzed; when the hardening modulus (or softening modulus) changes from positive to negative, the deformation pattern will change from uniform pattern to localization pattern.

Key words: strain gradient, representative volume element, plasticity gradient volume element, strain localization, start-up mechanism

CLC Number: 

  • O 344
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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