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Purpose: To compare the impact of different bridge constructions and different loads on stress distribution in bridges. Design/methodology/approach: The study was conducted on 96 computer models of both premolars and molars that simulated a missing second premolar restored with a bridge supported on crown inlays or onlays. Simulations were made of a bridge constructed from four different materials:...
Purpose: The aim of the research is the computer simulation of the internal stresses in bilayer coatings Ti+TiN and Ti+Ti(C,N) obtained in the magnetron PVD process on the sintered high-speed steel of PM HS6-5-3-8 in working atmosphere including 100% N2, and 50%N250%CH4. Design/methodology/approach: The experimental values of stresses were determined basing on the X-ray diffraction patterns using...
Purpose: The determination of the temperature distribution, temperature gradients and thermal stresses in the exhaust valve with using the layer of the carbon deposit in initial phase of the work of turbocharged Diesel engine. Design/methodology/approach: The results of calculations of the temperature distribution, temperature gradients and thermal stresses in the exhaust valve of turbocharged Diesel...
Purpose: Bimetallic bars which possess higher corrosion resistance and mechanical properties, it is the new kind of bimetallic bars, which are better than standard bars. The bimetallic bars are more often applied in concrete construction. Design/methodology/approach: The simulations of the bar rolling were carried out using the Forge2007® commercial program. Findings: The use of non-corrosive steel...
Purpose: The determination of the temperature distribution in the wet cylinder sleeve in initial phase of the work of turbo Diesel engine. Design/methodology/approach: The results of calculations of the temperature distribution in the wet cylinder sleeve of the turbo Diesel engine were received by means of the two - zone combustion model and the finite element method. Findings: The computations presented...
Purpose: Appropriate selection of material and geometric characteristics of intraosseus pillar implant part creates a possibility to control the bone tissue loading. Design/methodology/approach: A basic tool that is commonly used the evaluation of bone loading state is the linear FEM analysis. It requires setting of appropriate experiment conditions. Hence, an analysis has been carried out in order...
Purpose: The paper presents the results of theoretical investigations of the process of rolling reinforcement bars designed for concrete reinforcement. In the investigation. particular consideration was given to the analysis of the effect of pre-finished band shape on the formation of ribs on the finished bar in the finished pass. Design/methodology/approach: Using the numerical modelling to rolling...
Purpose: Basing on the results of computer simulations, it will be possible to choase proper technological parameters for the slitting rollers (such as shape), which will assure the slitting of the band and verify the force parameters. Design/methodology/approach: Using FEM-based computer programs for solving the problems of the theory of plasticity enables determining the force parameters during...
Purpose: New kind of reinforcement bars are bimetallic reinforcement bars which has a higher corrosion resistance and mechanical properties, than the standard bars. The bimetallic bars are more and more often applied to building of concrete construction. This kind of application decides about high requirements imposed upon their performance characteristics and mechanical properties. Design/methodology/approach:...
Purpose: The qualification of influence of received step of analysis in numeric calculations on the value and distribution of the temperature in the inlet and outlet valve in the turbo Diesel engine in initial phase its work. Design/methodology/approach: The results of calculations of the value and distribution temperature in the valves in turbo Diesel engine received by means of the two zone combustion...
Purpose: FEA analyses are frequently faced with modeling situations where field surface and changing contact cannot be assumed ignored. Design/methodology/approach: The effect of stress in machine elements due to friction between working machine parts has to be considered for analyzing the machine component with ANSYS software package. The interaction between the hole surface and pin was modeled with...
Purpose: The analysis of asymmetric band rolling in the finishing stand of a plate rolling mill has been carried out within the present study with the aim of establishing the effect of the speed asymmetry factor, av, on band bending during the rolling process and determining the strain velocity distributions of the rolled material in the roll bite region. Design/methodology/approach: The simulation...
Purpose: In order to correctly design the process of bar rolling in grooves it is required that several limitations affecting the rolling process be considered. When developing a technology, energy and force parameters among others, are needed to be taken into account. Therefore, it is purposeful to examine variations in the energy and force parameters during the rolling of bars. Design/methodology/approach:...
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