AN EXPERIMENTAL STUDY AND ANALYSIS OF THE BEHAVIOUR OF ROCK UNDER CYCLIC LOADING

In this paper, two types of cyclic loading tests are described. The factors affecting the deformation of rocks are discussed. The endochronic constitutive equations are noted and applied to fit the test data. Conclusions are as follows: (1) During cycling, the total deformation of the specimen consists of initial deformation induced by static loading, creep deformation and damage deformation produced by cycling itself. The damage deformation is the main factor that results in the specimen failing. (2) There is a critical strength that is related to amplitude, loading rate and waveform. This critical strength named cyclical strength is lower than the static strength. (3) The cycle amplitude and the loading waveform have important effects on deformation. In each cycle, the deformation caused by sine waveform loading is larger than that by triangle waveform loading. The larger the cycle amplitude, the shorter the working-life. (4) During cyclic loading, the lateral deformation develops faster than the axial deformation. (5) Because of the existence of damage deformation, the working-life in cyclic loading is less than that in creep. (6) For cycling in the pre-failure and post-failure regions, the specimen shows different deformation behaviour. (7) The endochronic constitutive equation has an ability to describe the stress-strain curve under cyclic loading conditions and fits the experimental data well.(A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01489062
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Zhenyu, T
  • Haihong, M
• Publication Date: 1990-2

Language

• English

Media Info

• Pagination: p. 51-56
• Serial:
  • Intl J of Rock Mech & Mining Sci & Geomechanic Abs
  • Volume: 27
  • Issue Number: 1
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0148-9062

Subject/Index Terms

• TRT Terms: Deformation; Fatigue (Mechanics); Loads; Plasticity; Repeated loads; Rocks; Sandstones; Stability (Mechanics); Tests
• ITRD Terms: 5595: Deformation; 5579: Fatigue (mater); 5567: Load; 5922: Plasticity; 5588: Repetitive loading; 4154: Rock; 4104: Sandstone; 5930: Stability; 6255: Test
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00605889
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Mar 31 1991 12:00AM