Examining the geometry of fault zones offers clues to the level and the direction of the stress exerted on the rock.

The effects of different factors, such as the loading direction, the size, the loading speed, the water content and geometry shape, on the chestnut shelled force were investigated in this manuscript.

By using geometry analysis method, this paper educed calculation formula of normal direction gear side clearance when internal gearing involute gear transmission center distance waned slightly.