This paper presents the metrological quality and mechanical properties of models in the form of hook holders manufactured from MED610 polymer material using PolyJet Matrix (PJM) technology. Measurements in the dimensional and shape analysis were made using the optical method with a microscope. The mechanical test was estimated by static tensile testing of the fabricated parts. A comprehensive approach to both the analysis of test results based on standardized samples and real hook models makes the presented results of great scientific and engineering value and creates the possibility of practical use in the medical industry, which has not been so comprehensively presented in the currently published research papers. Analyzing the results of measurements of the geometrical characteristics of the elements, it can be concluded that the PolyJet Matrix 3D printing technology has demonstrated a high level of precision in manufacturing the prototype parts. The static tensile test of samples, taking into account the printing directions, showed a high anisotropy of mechanical properties. The results of both strength and simulation tests indicate that it is necessary to assume a relatively high safety factor, the value of which depends on the direction of printing, which, in the case of such a responsible medical application, is very important.

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The article presents the results of compressive strength tests of cylindrical samples with a hexagonal cell structure. The samples were made of MED 610 material using the photo-curing technology liquid polymer resins. The compressive strength was estimated on the basis of a static compression test of the printed elements. It has been shown that the PolyJet Matrix 3D printing technology enables the printing models with a thin-walled cell structure, which, while maintaining the appropriate strength properties, can be used in the design and production of certain utility models.

Векленко Ю.А., Бардін О.А., Рудник М.В. Державний науково-дослідний інститут випробувань і сертифікації озброєння та військової техніки ВИЗНАЧЕННЯ КОЕФІЦІЄНТА ЗАПАСУ МІЦНОСТІ МІНОМЕТНИХ СТВОЛІВ ЗА ДОПОМОГОЮ КРЕШЕРНИХ ПРИЛАДІВ У статті розглянуто теоретичні аспекти та практичні питання випробування мінометних стволів за допомогою крешерних приладів, шляхом поступового збільшення тиску в каналі ствола, для визначення гранично допустимих навантажень на ствол міномета. Ключові слова: випробування мінометів, крешерні прилади, пружні та пластичні деформації, запас міцності, безпека розрахунку міномету.