CHEN Hong-kai, TANG Hong-mei. Method to Calculate Fatigue Fracture Life of Control Fissure in Perilous Rock[J]. Applied Mathematics and Mechanics, 2007, 28(5): 575-580.
Citation: CHEN Hong-kai, TANG Hong-mei. Method to Calculate Fatigue Fracture Life of Control Fissure in Perilous Rock[J]. Applied Mathematics and Mechanics, 2007, 28(5): 575-580.

Method to Calculate Fatigue Fracture Life of Control Fissure in Perilous Rock

  • Received Date: 2006-04-21
  • Rev Recd Date: 2007-03-08
  • Publish Date: 2007-05-15
  • Rupture and safety of perilous rock are dominated by control fissure behind perilous rock block.Based on model-Ⅰ and mode-Ⅱ stress strength factors of control fissure under acting of weight of perilous rock,water pressure in control fissure and earthquake forces,method to calculate critical length of control fissure is established.Water pressure in control fissure is taken as a variable periodic load,and abiding by P-M criterion,when control fissure is filled with water method is established to calculate fatigue fracture life of control fissure in critical status by contributing value of stress strength factor stemming from water pressure of control fissure in Paris's fatigue equation.Further,parameters C and m of sandstone with quartz and feldspar in the area of the Three Gorges Reservoir of China are obtained by fatigue fracture testing.
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