›› 2009, Vol. 30 ›› Issue (S2): 83-87.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on test of modelⅠnonlinear fracture toughness of undisturbed frozen soils based on energy balance method

LIU Xiao-zhou 1, 2, WU Yin1, WANG Zhong-chang1, LI Hong-sheng1, WU Jun-jie2   

  1. 1.Key Laboratory for Prediction & Control on Complicated Structure System of Education Department of Liaoning Province, Dalian University, Dalian 116622, China; 2.State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental & Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2009-08-17 Online:2009-08-10 Published:2011-06-21

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Abstract:

By using the fracture model based on the principle of energy balance, nonlinear fracture toughness tests on undisturbed frozen soils were conducted. According to the variational rules of heave quantities, the frozen depths and time at different depths, the temperatures were controlled strictly when the specimens were being made and tested. The nonlinear fracture toughness and of modelⅠ straight crack specimens are obtained, which make a meaningful attempt and spread the thoughts for the research of nonlinear fracture toughness of undisturbed frozen soils.

Key words: undisturbed frozen soils, field test, energy balance method, nonlinear fracture toughness

CLC Number: 

  • TU 445
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