METHOD DETERMINING PLASTO-ELASTIC DEFORMATIONS OF MATERIALS Russian patent published in 1999 - IPC

FIELD: tests of materials. SUBSTANCE: method involves marking of indentation of specified length by spherical indenter with the use of pendulum deforming device. Degree n of plasto-elastic deformation is determined by depth h of indentation by dependence n=, where r is radius of indenter, mm. Then actual depth h_act of indentation after dynamic loads is found and used to determine degree of plastic deformation. Mentioned dependence can be expressed in the form of nomogram. Work performed by pendulum of deforming device to form indentation is found in addition and is used as evaluation criterion of resistance of metal to deformation. Energy complying with upper position of pendulum of deforming device correspondingly before and after marking of indentation is found by scale of deforming device. EFFECT: widened technological capabilities while determining strength characteristics of metals working under conditions of dynamic loads. 2 cl, 4 dwg, 1 tbl