To describe the anisotropy of microdamage of the crust block, we use the damage tensor that is expressed in the fissure density.

为壳块体微损伤的各向异性，引入裂纹度表示的损伤张量形式。

Microdamage accumulation will finally lead to bone fatigue fracture.

显微损伤的终会导致骨的疲劳骨折。