›› 2009, Vol. 30 ›› Issue (9): 2581-2587.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Mechanical characteristics of rock and soil affected by particle size of crystal and mineral

XU Shang-jie1, 2, YIN Xiao-tao3, 4, DANG Fa-ning1   

  1. 1. Institute of Geotechnical Engineering, Xi?an University of Technology, Xi?an 710048, China; 2. Shandong Provincial Institute of Water Resources, Jinan 250013, China; 3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 4. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2007-02-27 Online:2009-09-10 Published:2010-03-24

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Abstract:

Big size of particle such as crystal, mineral or aggregate is often seen in rock or concrete material. The mechanical behavior of these particles with big size crystal is simulated by clump, which can break during the loading process. According to the designed numerical uniaxial compression test of particle material with same number of particle, same spatial location and different radii of clump, the material’s mechanical response affected by these different sizes of crystals, minerals or aggregates is observed by means of rupture shape, fracture propagation, curve of stress and strain and energy dissipation process during the breakage of particle material under virtual experimental condition. It is found that big size particle does favor to material feature’s enhancement, can stop the expansion of crack and makes cracks produced around the clump, and that the enhancing degree is proportional to the clump radius.

Key words: particle flow, particle material, clump, breakage, energy

CLC Number: 

  • TU 443
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