{1}: | Fdef = C * Mp * (D/t)½ |
C | = | factor related to jaw shape of the shear and extend of deformation | |
Mp | = | plastic moment per unity of length | |
= | σy * ( t2 / 4 ) | ||
t | = | wall thickness | |
σy | = | yield stress | |
D | = | tube diameter |
Fcut > Fdef |
{2}: | Fmax = 55 * Mp * (D/t)½ |
Fmax > 55 * Mp * (D/t)½ |
{3}: | Fshear = A * 0.8 * σt |
Fshear | load required for shearing shear | ||
A | = | area of material between the blades of the shear | |
σt | = | tensile strength of material to be cut |
{4}: | Acrosss-sectional < 0.8 * Fcut / ( 0.8 * σt ) |