Kuryliak V. Increasing of the reliability of the assessment of the quality of metal materials in high-speed loads conditions

In the dissertation the solution of an important scientific and practical task to increase the evaluation of the quality level of loaded metal materials is obtained by selecting and implementing the speed parameters of the evaluated samples in the software "AQM". The object of research in work is the process of assessing the quality of metal materials, the subject of the study are the methods of qualimetry and their application to assess the quality of metal materials that work in high-speed loads. The aim of the work is to increase the reliability of the assessment of the quality of metal materials that operate in high-speed load conditions through the use of qualimetry methods. The results of theoretical and statistical researches concerning estimation of quality level of speed-loaded metal materials with the help of methods of qualimetry are given. It is established that in order to increase the reliability of their evaluation, it is necessary to propose acceptable qualitative characteristics of metal materials, which, in the case of quality evaluation in conditions of high-speed loads, are represented by dynamic parameters. The paper presents the results of experimental studies of impulse shock loading of metal samples. During the experiment, qualitative dynamic characteristics of the metal materials were obtained. It is determined that the transverse and longitudinal shear rate, shear velocity and breaking strength are determinative in the process of assessing the quality level of loaded metal materials. Five possible variants of quality of samples are established with the help of the "web of quality" and a scale principle first applied to regional high-speed loads.