Effect of Railcar Wheel Tire Profiles on the Contact Stress Level in Subway Rails

Strength of Materials - The statistical analysis performed on the defectiveness of rails in the Kiev subway railway shows that the main cause of the occurrence of most defects is the contact...     

Restricted proteolysis of legumin of broad beans: Effect on thermodynamic properties of aqueous solutions and interaction with ficoll

Thermodynamic properties of aqueous solutions of both native and modified legumin of broad beans (Vicia faba L.) have been examined. A restricted trypsin-induced proteolysis was used to modify protein structure. Evaluation of protein affinity to ficoll in aqueous solutions showed that modified protein possessed higher hydrophilicity. Thermodynamic properties of diluted solutions were used to predict the phase behaviour in concentrated systems containing protein and ficoll. At specific concentrations of native legumin, the system can separate in two phases, whereas in the case of modified protein the single-phase behaviour of the system was predicted for any concentrations of both components. The experimental data obtained in concentrated systems confirmed predictions of thermodynamic analysis of diluted solutions.     

Predicting the propagation of damage in roller bearings of aircraft engines by vibration analysis

This work represents the results of testing roller bearings for wear. In this study, we have measured vibration overloads and analyzed them with regard to the occurrence of damage in bearing parts. We have determined the relationship between the vibration intensity and the type of damage in working surfaces of roller bearing parts.     

Study of the Consolidation and Phase Formation in the γ-TiAl-Based Material Sintered with a TiH2 Precursor

Powder Metallurgy and Metal Ceramics - The hydride powder technique was employed to produce intermetallic TiAl alloys using a mixture of Al and TiH2 powders. The features peculiar to the...