FIELD: analysis and testing of materials. SUBSTANCE: installation has supporting rings 18 and circular recesses 19 in which faces of specimen 11 are positioned, cylindrical pistons 20 and levers 21 and 22. Grips are made as internal 25 and external 28 cylinders positioned one inside the other with clearance and stepped flanges 26 and 29, respectively. Stepped flange 26 of internal cylinder 25 has two parallel flats 27, and face of vacant end of external cylinder 28 is provided with slots 30. Circular chamber 32 is formed by pistons 20 and side surfaces of external cylinder 28 and specimen 11. Novelty in installation is manufacture of grips in the form of internal 25 and external 28 cylinders and use of supporting rings 18, cylindrical pistons 20 and levers 21 and 23. EFFECT: higher test results. 2 dwg
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