爆炸过程裂纹发展的高速摄影试验研究

On High Speed Photograph Test of Fractures Evolution During Blasting

目的研究爆破过程应力波作用及裂纹发展规律．方法通过硼硅酸玻璃平面模型柱状装药高速摄影爆破试验，观察不同瞬间的裂纹分布图片并进行分形特征分析研究．结果随着应力波在介质中传播所产生裂纹的分维呈增加趋势，其增加幅度随着应力波作用及其自由面效应变化具有明显的起伏．结论裂纹的分形研究对于深入探索爆破过程的应力波作用规律是很有意义的．

Aim\ To study shock wave action and the fracture evolution process Methods\ Through observing the fractures during blasting with the high speed cameras, the photographs taken at different instants were analyzed by using fractal dimension Results\ It was found from the test that the fractal dimension of fracture showed an increasing trend with the increasing of time; but there were flactuations depending on the shock wave action and its surface effect Conclusion\ The fractal study on fracture is important for the shock wave action during blasting