PROCESS TESTING SHEET MATERIALS FOR DOUBLE-AXES TENSION Russian patent published in 2004 - IPC

FIELD: testing equipment. SUBSTANCE: invention can also be used to establish characteristics of mechanical properties of sheet materials under conditions of double-axes tension. Process testing sheet materials for double-axes tension consists in placement of specimen in the form of disk on matrix, in its jamming with the help of pressure ring, in loading with stiff punch positioned uniaxially with matrix and in determination of ultimate plasticity of tested material. Specimen with one-sided recess in its working part is utilized in test, it is loaded up to breaking along circular peripheral zone located between jamming area formed along outline of specimen and working part with diameter equal to 0.8 diameter of cavity in punch. EFFECT: enhanced accuracy of tests of sheet materials, reduced labor input and reduced usage of material. 1 dwg