Abstract：Rock is a kind of natural engineering material with genetic defects. For the complexity of its mechanical property，the mature model to describe rock damage process is not yet established. To solve this problem，from the basic isotropic damage，based on strain equivalent principle and least energy consumption principle，one novel damage evolutionary model of the rock from the energy principle is developed. From analysis the whole test process of granite block from meso-damage to macro fracture，the damage evolutionary model of granite is obtained based on energy principle. Compared to the computing results of traditional Marzars damage model，we can find that the new damage model proposed here can reflect the rock damage process more reliably，and coincide with the real fracture process of rock test very well.
2011, Vol. 30 
