The Action Result of the Concentrated Load on the Briquettes which Obtained from the Technogenous Material

In this study, the calculation results of the briquette stress state by the Finite element method are presented. The fields of compressive and tensile stresses in briquette are determined. The conditions affecting the process of the briquette destruction are considered. Keywords: metallurgical briquette, finite element method, stress stat

Recycling Option of the Wrong Length Copper Wire

The purpose of the study is to study the possibility of utilizing copper waste from drawing. The experimental testing was carried out with reference to the compacting of segments of copper wire to produce products in the form of bars. The finite element method was used to evaluate the stress-strain state when the raw material compression scheme in the container was realized. It is shown that with the tested treatment modes a high level of strength properties is achieved, but an insufficient level of plastic characteristics. Keywords: Recycling, copper wasters, stress, strain, program complex ABAQUS, finite element method, pressing, extrusio

Osteointegration Characterization of Additive Manufactured Porous Titanium Scaffold Based on Microhardness and Ca/P Ratio

Additive technologies are getting widely used in orthopedics due to the opportunity of full modelling of complex cellular structures and producing personalized implants. Titanium and its alloys are still the main material used for metallic implants manufacturing. In this study microhardness and Ca/P ratio of bone tissue surrounding the implant were investigated. By means of ABAQUS software titanium porous structure implants were designed. Their biomechanical properties were close to biomechanical properties of trabecular bone tissue. Direct metal laser sintering (DMLS) was used to manufacture implants from Ti-6Al-4V titanium alloy. They were augmented in trabecular bone defects of Chinchilla rabbits for 6, 12 and 25 weeks. The samples were examined by scanning electron microscopy (SEM) in a FEG SEM ZEISS CrossBeam AURIGA and the Ca/P ratio was calculated using the accompanying Oxford Inca software. Vickers hardness test method was performed for microhardness. It was shown that there was a significant increase in both mineral and mechanical properties of bone samples with an increase of observation period. The results found in this study illustrate a distinct relationship between the mineralization parameter of bone tissue and its microhardness (r = 0.808, r2 = 0.65).     Keywords: Scaffold, Microhardness, Titanium, Ca/P ratio, Bone defect, Osteointegration, Additive manufacturin

Strain state of billet under torsion in closed container

Translated from Russian (Isv. Vyssh. Uchebn. Zaved., Chern. Metall. 1987 (12) p. 45-49)Available from British Library Document Supply Centre- DSC:5828.4(M-Trans--37876)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo