材料参数对炸药等脆性材料裂纹扩张速率的影响研究

Research on the Effect of Explosive Material Parameters on Its Crack Expand

炸药等脆性材料的力学特性与塑性材料有本质的区别。本文根据脆性材料的动力学特性,推导出了脆性材料物理参数与其裂纹长度及裂纹扩张速率的关系,并据此重点讨论了材料参数对脆性材料在冲击波作用下裂纹扩展速率的影响,同时给出了脆性材料的动态断裂破坏准则。本研究可推广到混凝土、岩石等脆性材料的实际工程应用中。

There exists essential difference between the brittle material and the plastic material about mechanics characteristic. According to the dynamics characteristics of the brittle material, the equation between the brittle material parameters and the crack length ＆ crack expand velocity is deduced, and the effects of brittle material parameters on crack expand velocity under the shock wave is discussed in this paper emphatically. The dynamic fracture criterion under shock wave is also put forward. All of above can be applied in many brittle materials engineering such as concrete, rock, etc.