You can make the blade from a springleaf from an old Ford.
你可以用一辆旧福特牌汽车上的钢板做矛头。
2
Two or three locking screws are placed specifically at the ends of the plate. This 'springleaf' like construct allows micro-motion at the fracture site.
在钢板末端固定两个或三个锁定螺钉，这种类似“跨越的钢片”的结构允许骨折部位产生微动。
3
By the variational method, the governing equation of the plate non-linear theory is solved, and he relationship between load and deformation of a single springleaf is obtained.