抄録
Hysteresis loops and anisotropy due to plastic deformations were studied, and the conclusions are as follows : 1. Plastic deformation is to be devided into shears in three directions, and each shear must be considered individually. 2. Individual resistances in three directions, R1, R2, R3, are equal in magnitude, or [number formula] 3. The stress range of elastic deformation in any direction, when the direction of shear is reversed, is R. 4. The resistances R1, R2, R3, do not correspond to the shearing stresses τ1, τ2, τ3, but they correspond to such shearing stresses S1, S2, S3, as [number formula] where, σx, σy, σz, are the principal stresses, and σm is the mean stress. The above conclusions are the authors' new theory of plasticity. By this theory the following experimental facts can be accounted for. 1. The relation between tension and pure shear. 2. Hysteresis loops. 3. Anisotropy due to plastic deformations. 4. The relation between the yield point of mild steel and the plastic deformation after that.
