不耦合装药爆炸应力场的动光弹研究

用动光弹方法定量研究了多个不耦合系数下爆炸应力场衰减规律。模型材料为环氧树脂平板。研究表明:当不耦合系数在1～1.75之间取值时,比例距离在15～60范围内,|(?)/(?)|max的值介于3.21～5.00之间,|(?)/(?)|max的值介于小4.61～9.50之间。

DYNAMIC PHOTOELASTIC INVESTIGATION OF THE ACTION OF DECOUPLE

The isochromatics of the propagation of blasting stress wave was recorded by means of the dynamic photoelasticity with a multiple spark high - speed camera. The models were made of the plate of epoxy resin. The quantitative relations of stress fields around a borehole with defferent decoupling coefficients were obtained by means of the analysis method of approximate elastic calculation. These quantitative relations are mainly the attenuation of oR with R( =R/r,where R--the distance between the center of a borehole and the point of measurement, r--the radius of a charge), the tangential stress a, with R, radial strain eR with R, the tangential strain eg with R. The influence of the decoupling coefficients on the blasting stress fields was compared.It was shown that the value of max ranges from 3. 21 to 5. 00 and the value of max is between 4. 61 and 9. 50 when the decoupling coefficient ranges from 1 to 1. 75 and the ratio distance is between 15 and 60.