滑移线法是求解极限荷载的一个重要方法。关于滑移线的性质有著名的Ｈｅｎｃｋｙ第二定理。经典形式的Ｈｅｎｃｋｙ第二定理是针对金属一类的非摩擦材料提出的，其文字表述为：如沿某一滑移线移动，则另一族滑移线在交点处的曲率半径的变化等于沿该滑移线移动的距离。用公式表 The slip line method is an important method to solve the ultimate load. On the nature of the slip line there is the famous Hencky second theorem. The classic form of Hencky’s second theorem is proposed for non-friction materials such as metals, the text of which is expressed as: if moving along a slip line, the change in the radius of curvature of the other slip line at the intersection point is equal to The distance the slip line moves. Formula table