机械波对脆性材料断裂的作用

Effect of mechanical waves on fracture of brittle materials

在继承Griffith(格里菲斯)断裂理论能量观点的基础上,通过对产生驻波(机械波形式驻波)现象的脆性材料进行力学理论分析,研究得到了在驻波振动过程中弹性势能对于脆性材料断裂的作用.在驻波分析所得结论的基础之上,将结论推广应用到一般机械波——行波,研究了加载速率、几何因素、行波能量大小对脆性材料断裂的作用,得到了适用于脆性材料断裂的普适性结论.

Based on the energy concept of Griffith fracture theory,the impact of elastic potential on brittle materials is gotten by mechanical theory analysis of the brittle materials which producing standing-wave（in this article,the standing-wave is a kind of mechanical wave） phenomenon. On the base of conclusion that the analysis of standing wave phenomenon,the conclusion is spread and applied to universal mechanical wave-traveling wave,the loading rate,geometry factors in the fracture of brittle materials and the energy of traveling wave are researched and the universal conclusion adapting to the fracture of brittle materials are gotten.