我们知道金属内部组织的方向性或纹理导致金属机械性能的各向异性,深拉延过程中变形的凸耳现象也表明金属(板材),是各向异性的。板料的深拉延性能取决于各向导性应变系数,定义为R_ρ=?_W/∈_1式中∈_w We know that the orientation or texture of the internal structure of the metal leads to the anisotropy of the mechanical properties of the metal. The deformed lug phenomenon during the deep drawing also indicates that the metal (plate) is anisotropic. The deep drawability of the sheet depends on the anisotropic strain rate, defined as R_ρ =? _W / ∈ 1 where ∈_w