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ZHANG Hui-mei, YANG Geng-she. DAMAGE MECHANICAL CHARACTERISTICS OF ROCK UNDER FREEZE-THAW AND LOAD COUPLING[J]. Engineering Mechanics, 2011, 28(5): 161-165.
Citation: ZHANG Hui-mei, YANG Geng-she. DAMAGE MECHANICAL CHARACTERISTICS OF ROCK UNDER FREEZE-THAW AND LOAD COUPLING[J]. Engineering Mechanics, 2011, 28(5): 161-165.
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DAMAGE MECHANICAL CHARACTERISTICS OF ROCK UNDER FREEZE-THAW AND LOAD COUPLING

  • (1. Department of Mechanics, Xi’an University of Science & Technology, Xi’an 710054, China; 2. College of Architecture and Civil Engineering, Xi’an University of Science &Technology, Xi’an 710054, China)

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  • Received Date: December 31, 1899
  • Revised Date: December 31, 1899
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    • Abstract
  • The paper derives the damage evolution equation in terms of freeze-thaw cycle and strain for the freeze-thaw and loaded rock based on micro mechanical mechanism and using the methods of macro phenomenological damage mechanics and non-equilibrium statistics. The real damage propagation constitutive relation of the freeze-thaw and loaded rock is established by using the generalized theory of strain equality. And the evolutionary route of micro-structural damage and materials mechanical properties for the rock are discussed. It is shown that the damage of freeze-thaw rock is mainly caused by fatigue. The dual effect of the freeze-thaw and the load on the rock damage presents obvious nonlinear property, and the coupling effect weakens the whole damage. Moreover, the influence of freeze-thaw cycle and strain on the damage propagation is determined by the lithology and the initial damage state of the rock..
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