PROCESS OF TESTING OF SHEET MATERIAL Russian patent published in 1995 - IPC

FIELD: material testing. SUBSTANCE: testing is conducted under conditions of flat-deformed state and linear tension state. Process includes cutting of samples of sheet material along direction and at angle 45 deg towards rolling so that ratio of height h of sample to its width b was not less than 1.25 and ratio of length L to width b is not less than 15. Upsetting of at least one pair of samples cut at distance b₁ from each other having thickness h₁ chosen from relationship h₁= 0,1-0,2h is conducted. Before testing samples are bent along lintel till their faces match in width with direction of working surface of plate. Samples oriented at angle 45 deg towards rolling are cut with inclination of 90 deg with respect to each other. Upsetting is conducted both between flat plates and between plates with wedge protrusions which working surfaces are inclined at angle 90 deg with respect to each other. The latter is recommended for upsetting of samples cut from materials with thickness not less 1.5 mm. EFFECT: enhanced efficiency and authenticity of process. 4 cl, 6 dwg