摘要
本文试图通过对肥东大理岩的预制裂纹三点加载下的扩展速度的测量，模拟已有断裂再次经受应力变化时，断裂的扩展情况。试验结果给出了大理岩稳态扩展速度为１．１×１０－５～２．８×１０－４ｍ／ｓ，失稳后的扩展速度为５×１０１～１．２×１０３ｍ／ｓ。同时还给出了失稳后扩展速度的分布，并用断裂力学止裂观点对此作了解释。对裂纹扩展与地震孕震过程的关系也作了初步探讨。
This paper tries to simulate growth of crack at existing crack which is subjected to stress variation, by means of measurement of growth speed of prefabricated crack of Feidong marble under three-point loading.Results show that the steady-state growth speed of marble is 1. 1 ×10-5～2. 8 ×10-4m/s, the growth speed after destabilization is 5 ×101 ￣ 1. 2×103m/s. At the same time the distribution of growth speed after destabilization is given too. It is illustrated from the viewpoint of fracture arrest. The relations between crack growth and earthquake process are also briefly discussed.
出处
《岩土力学》
EI
CSCD
1994年第3期51-58,共8页
Rock and Soil Mechanics
关键词
岩石裂纹
扩展速度
地震
孕震过程
rock crack
growth speed
earthquake
inquiry of earthquake process
