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Information × Registration Number 0221U101997, 0116U001958 , R & D reports Title Creation of Physical Model of Crack Resistive of Metals popup.stage_title Head Hanulich Borys K, Registration Date 27-01-2021 Organization Lutsk National Technical University popup.description2 ABSTRACT GDR report: 72 pages, 7 tables, 19 figures, 124 sources. METAL, CRACK RESISTANCE, THEORETICAL STRENGTH, CRACK TOP, FLOATING STRIP, ELASTIC-PLASTIC ZONE, SCALE FACTOR, X-RAY X-RAY. The object of the study is the elastic-plastic zone near the crack tip during quasi-brittle fracture under conditions of separation. The purpose of the work is to describe the relaxation processes that occur at the top of the separation crack during quasi-brittle fracture. The paper consistently groups the results of the author's research on the study of the stress-strain state in the vicinity of the crack tip in metal. A method for estimating the theoretical strength of metals is proposed, which also allows to determine the maximum possible deformation during fracture. Particular attention is paid to the development of plastic deformations in individual yield lines, because at the top of the separation crack at a certain stage of deformation plastic deformations are localized in two, symmetrical relative to the crack plane, bands (straight lines). Based on the proposed criterion for the appearance of flow lines with the use of variational calculus, a general view of the stress fields that cause the appearance of flow bands is obtained. An experiment is described to observe the complete relaxation of tangential stresses in metals when the normal ones exceed the yield strength. An example of calculating the resource of a real structure based on the provisions of linear fracture mechanics is given. To answer the question of the possible influence of the environment on the resource characteristics, a method of measuring the adsorption effect of liquids on the shear modulus is proposed. volume_up content_copy share star_border Product Description popup.authors Hanulich Borys K popup.nrat_date 2021-01-27 Close