Open AccessDETERMINING THE TRUE LOADING DIAGRAM BY THE DISPLACEMENT FIELD IN THE SAMPLE NECK
Author(s) -
А. А. Быков,
N.V. Burtelova
Publication year - 2020
Publication title -
problemy pročnosti i plastičnosti
Language(s) - English
Resource type - Journals
ISSN - 1814-9146
DOI - 10.32326/1814-9146-2020-82-3-296-304
Subject(s) - displacement field , isotropy , displacement (psychology) , modulus , diagram , coincidence , materials science , structural engineering , mathematics , geometry , physics , finite element method , statistics , optics , engineering , alternative medicine , pathology , psychotherapist , medicine , psychology
The article presents a technique for determining the true loading diagram of a material along the displacement field. The technique is based on the assumptions about the coincidence of the initial sections of the true and experimental loading diagrams, the coincidence of the experimental and calculated maximum loads, and the coincidence of the calculated and experimental displacement fields in the sample neck after tensile testing. The required test results of wire samples (steel SV-07X16N6) and the expression in the form of the formula for the displacement field were used published in the literature. Young's modulus, Poisson's ratio and plastic curve were determined by the method proposed in the work. Modeling was carried out in the Abaqus software package according to a model based on the hypothesis of a single loading curve and homogeneous and isotropic hardening. The correctness of certain elastic-plastic properties of the material was determined by the coincidence of the calculated and measured loading diagrams, the maximum values of the calculated and experimental load and the experimental and calculated displacement fields, as well as the assessment of the load range at which the sample was divided into parts, and the calculated values of the separation load data range. In the process of applying the methodology, the satisfaction of all formulated requirements was achieved. It is shown that the true loading diagram has a yield area, as well as a section of an intense (convex downward) section of hardening after it. The results obtained will be useful in modeling units and assemblies, as well as technological processes in which the material is plastically deformed and an increased accuracy of calculating changes in their geometric shape is required. The work also contains all the results of determining the elastic-plastic properties of the material in a tabular form, necessary for the use by specialists, for use in their professional activities.