Dynamic Caustic Real-virtual Image of Interaction between Explosion Load and Inclined Crack
In order to study the interaction between the explosion load and the joints and cracks in rock mass,the stress field at the tip of inclined crack and the dynamic propagation of wing crack under the action of explosion load were studied by using the dynamic caustic line real image and virtual image comprehensive experiment method.The results show that under the action of explosion stress wave P wave,the mode Ⅰ stress intensity factor at the lower tip of the crack is less than 0,and the mode Ⅰ stress intensity factor at the upper tip of the crack is less than 0.Under the action of the main crack of the explosion,the main crack of the explosion is connected with the inclined prefabricated crack.The stress intensity factor of mode Ⅰ at the tip of the inclined prefabricated crack is less than 0,and the crack is not generated due to the compressive stress.The stress intensity factor of mode Ⅰ at the tip of the crack is greater than 0,and the stress intensity factor of mode Ⅱ is greater than 0,which is subjected to tensile stress and produces a horizontal wing crack.The comprehensive experimental method can simultaneously obtain the real image and virtual image caustic speckle data of crack tip under explosion load,and quantitatively characterize the interaction process between explosion load and inclined crack.
万方数据
维普
