Experimental study of influential rule of fractal intercept on energy dissipation of stress wave

Yexue Li, Qi Peng, Jianbo Zhu, Jianfeng Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Scanning experiment of rough fracture and impacting dynamics test of jointed granite is respectively conducted in order to investigate influential rule of geometrical characteristic of joint surface on energy dissipation of stress wave and establish quantitative relationship between fractal intercept and energy dissipation ratio contributed by intercept of stress wave across joint on the condition of fractal dimension 2.0≤D≤2.2. It is shown that contribution towards total energy dissipation ratio from fractal dimension is still primary; but in the interval, its contribution towards total energy dissipation ratio is constant and increment of total energy dissipation ratio is decided by fractal intercept. Energy dissipation ratio which is contributed by intercept of jointed rock decreases nonlinearly with the increasing of fractal intercept. By mechanism analysis, it is indicated that on the condition of similar impact loading, smaller shear displacement leads to less work and corresponding lower energy dissipation of stress wave because larger fractal intercept corresponds to higher shear stiffness. From microscopic view, during impacting loading, sample with larger fractal intercept brings lower probability of tiny plastic strain, crystal cracking, mutual impingement among molecule, so energy of stress wave is less dissipated.
Original languageEnglish
Pages (from-to)3982-3988
Number of pages7
JournalYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering
Volume30
Issue numberSUPPL. 2
Publication statusPublished - 1 Sep 2011
Externally publishedYes

Keywords

  • Energy dissipation ratio contributed by intercept
  • Fractal intercept
  • Jointed rock
  • Rock mechanics
  • Stress wave

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Geology

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