FIELD: physics.
SUBSTANCE: device includes two equal flat plates fixed in rupture device, so that samples can be mounted in them. Each plate has a form of trapeze of given thickness H. Plates contact each other by larger trapeze bases, with three ring grooves on working surfaces of plates, of different diameters with rectangular cross-section of given size. Average groove diameters Da uphold given ratio defined by tested pipe assortment, with groove depth h=0.4 H. Outer groove of maximum diameter fits into contours of connected plates.
EFFECT: extended technical capacities, reduced labour cost of test.
6 cl, 1 dwg
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