摘要
从损伤的实质物理意义出发,提出了损伤参量的抽象分形,把损伤推广应用到岩石的破碎阶段,用损伤插值分形来表示总体损伤,从而构造出损伤与块度的迭代关系式。根据冲击荷载作用下岩石中的能量耗散规律与脆性动态断裂准则,把应力波作用下的疲劳损伤迭代关系式应用到岩石的破坏后阶段,从而得出冲击能量、岩石损伤、块度分布之间的关系。实验研究表明,两种关系计算所得的损伤吻合较好。
The concept of abstract fractal characteristic of damage parameter is put fotward based on the internal physical meaning of damage and applied to the destruction phase of rock. The relationship between fractal damage and rock fragment sizes is studied. According to the principles of energy dissipation and dynamic fracture of rock impacted by loads, the damage evolution equation in the destruction phase of rock is presented. The results of experiment show that the two methods coincide well with each other.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第A02期2304-2308,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(50174056)
关键词
断裂力学
损伤
分型
能量作用密度
块度分布
fracture mechanics
damage
fractal
energy action density
size distribution of rock fragments
