确定断裂面上擦痕的产状,在几何学上是求解两个平面交线的产状.平面之一是断裂面,另一是平行于擦痕的铅直面.这样,铅直面沿擦痕倾斜方向的走向即是擦痕的倾向;而此铅直面与断裂面的交线(即一条擦痕)与其自身的水平投影之间的夹角便是其倾角. 根据空间几何关系,可导出断裂面的走向、倾角与其上的擦痕的倾向、倾角之间的解析表达 Determining the shape of a scratch on a fracture surface geometrically solves the problem of the intersection of two planes. One of the planes is the fracture surface and the other is parallel to the vertical plane of the scratch. The direction of the tilt direction is the tendency of the scratches, and the angle between the intersection of the vertical plane and the fracture plane (ie, a scratch) with its own horizontal projection is the angle of inclination. According to the spatial geometry, the fracture The direction of the surface, the inclination and the tendency of the scratches on it, the angle between the analytic expression