摘要
通过分析计算炮孔周边径向裂纹尖端的应力强度因子，认为：爆生气体驱动的裂纹扩展可分为稳定扩展和非稳定间断扩展两阶段。在稳定扩展阶段，裂纹扩展速度由Ｇｒｉｆｆｉｔｈ理论确定；在间断扩展阶段，裂纹的平均扩展速度完全取决于焊生气体在裂纹中的一维膨胀流动速度。
On the basis of the analysis and calculating of the stress-intensity factor ofcrack tips , concludes that the propagation of fracture driven by explosion products includes a stable grow stage and a discontinuous grow stage : the propagation velocity ofthe first stage is decided by Griffith Theory; the velocity of the second is completelycontrolled by the penetrating velocity of explosion products within the crack·
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1994年第3期264-268,共5页
Explosion and Shock Waves
关键词
爆生气体
裂纹扩展
岩石爆破
explosion products,fracture,propagation velocity stress-intensity factor, arrest toughness
