DEVICE FOR DETERMINING THE STRUCTURE OF A MATERIAL OR SAMPLES UNDER UNIAXIAL COMPRESSION AND METHOD FOR ITS USE

摘要

FIELD: material structure determination. ;SUBSTANCE: invention is intended to determine the structure of a material or samples under uniaxial compression. The substance of the invention lies in the fact that a device for determining the structure of a material or samples under uniaxial compression contains an upper cover, a lower cover, four pins, a dynamometer, a test sample with a coordinate grid or strain gauges, four nuts, four self-locking nuts, four locking nuts, a centering washer, four nuts for power transmission, four washers, a CT scanner including: cartridge, X-ray receiver, X-ray emitter, computer with installed software; at the same time, four studs, on which the nuts are pre-screwed, are installed on the inner part of the lower cover, the outer part of the lower cover is fixed with four self-locking nuts, which are then locked with locking nuts, while the lower end of the studs does not go beyond the plane of the end of the CT scanner cartridge, while the test sample is placed on the lower cover, a dynamometer is installed on top of the test sample, a centering washer is installed between the upper cover and the dynamometer, while the dynamometer is pressed by the upper cover, while a coordinate grid or strain gauges are preliminarily placed on the free surfaces of the test sample with the ability to determine the displacement field test sample, above the top cover, four washers and four nuts are installed on the studs to transmit the force with the possibility of providing the action of a compressive axial force on the sample under study; the lower cover is inserted into the cartridge of the computer tomograph so that the test sample is located between the X-ray receiver and the X-ray emitter, while the computer tomograph is equipped with a computer with installed software with the ability to process scan data of the test sample.;EFFECT: ensuring the possibility of obtaining a set of data on physical and mechanical properties (density, porosity, structure tensor and tensor of elastic constants) in the entire volume of the investigated full-scale specimen at a given external compressive axial force acting on the specimen under study and a known displacement field of the upper end.;2 cl, 9 dwg