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Purpose: The study aims to predict the loss factor properties of composite laminated plates. Design/methodology/approach: Elastic constants of laminates and damping properties have been determined by using an identification procedure based on multi-level theoretical approach. Findings: The present paper is the first attempt at proposing a novel adaptive procedure to derive loss factor parameters for...
Purpose: The hot ductility investigations under strain rate 0.01/s were shown in this work. The investigations were carried out on the low carbon-manganese steel 1008 with addition of boron. Design/methodology/approach: The ductility of the steel was measured by reduction of area of fraction after the extension test in the temperature range from 700 to 1200 degrees centigrade. The test was carried...
Purpose: Aluminium alloys have been indispensable for the progress of many technologies during the last decades. In particular, most stiffeners in aerospace structures are composed of aluminium panels often solicited with elastic and plastic bucking under particular boundary and loading conditions. The purpose of this paper is to enhance the difficulties encountered to predict the incipient elastic-plastic...
Purpose: This paper is aimed to study an effect of nitrogen incorporation on the structure and tribological properties of amorphous a C:N:H layers grown on polycarbonate substrates. Design/methodology/approach: Series of the layers were deposited from CH4 + N2 gas mixture with application of Plasma Enhanced Chemical Vapour Deposition technique assisted by radio waves (RF PE CVD). An analysis of atomic-level...
Purpose: This paper undertakes to assess what opportunities exist for the economical recovery of valuable metals from amorphous solid wastes that may be considered as"synthetic ores". Also, this work is an attempt to optimize a leaching process that is the most determinant step of hydrometallurgical process used to extract metals from ores. Design/methodology/approach: The samples of amorphous...
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: of this publication is to present the changes of the structure in the power station boiler and turbine components made of low cast steel Cr-Mo-V after long time creep service. Design/methodology/approach: The material of the research studies has been obtained from Polish power stations. All examined elements have exceeded their assessed life of 100.000 hours. The microstructures of the elements...
Purpose: Intensification of die casting of car silumins wheels with use of the water mist instead of compressed air dies cooling in low pressure casting process were presented in the paper. Design/methodology/approach: Examinations of casting process parameters were carried out on the industrial workstation of casting car wheels under the low pressure and also with Magma computer simulating system...
Purpose: Basic material concept, technology and some results of studies on aluminum matrix composite with dispersive aluminum nitride reinforcement was shown. Studied composites were manufactured with use f ex-situ technique and powder metallurgy. Design/methodology/approach: Aluminum nitride powder was manufactured in process of self-evolving high-temperature synthesis SHS. Composite powder Al-AlN...
Purpose: In this work there are presented basic methods of reverse task of active and passive mechanical systems realization. The principal aim of the research taken is to work out a method of structure and parameters searching i.e. structural and parametric synthesis of discrete model of mechanical system on the base of desired requirements. The requirements refer to dynamic features of the system,...
Purpose: The aim of this paper is to present the critical analysis of some multi-criteria techniques applied in the area of quality management. It is strongly stated that some solutions in this scientific area characterizes the non-methodological approaches. Design/methodology/approach: The research methodology, in presented work, has been based on the theoretical analysis of the quality tools management...
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: Building up on the fracture mechanics (Paris law for crack propagation) based fatigue life prediction model developed earlier by the authors, Monte Carlo simulation has been performed to evaluate sensitivity of die life related to important geometrical and material parameters. Stochastic nature of various fatigue-related die parameters is used to reflect their variability. Design/methodology/approach:...
Purpose: The paper is dealing with one segment of broader research of universality systematicness in application of seven basic quality tools (7QC tools). The research was carried out in different areas that include power plant, process industry, government, health and tourism services. The aim of the research was to show on practical examples that there is real possibility of application of 7QC tools...
Purpose: The purpose of this paper is to discuss some problems concerning the extremely high values of the nitride layer hardness and the features of so called S-phase which are formed after low-temperature ion nitriding of high-alloyed austenitic (austenitic-ferritic) steels. Design/methodology/approach: The investigations are performed mainly by using of ray diffraction method after ion nitrided...
Purpose: The goal of this work is to introduce basic methods of preparing polymeric gradient materials, which allow to join two different components to ensure the required properties and structure of the functionally gradient materials. Design/methodology/approach: In this paper few of methods of preparing functionally gradient polymeric materials are briefly described which were successful employed...
Purpose: An FFT-based spectral dynamic analysis method is developed for the viscously damped, linear discrete dynamic systems subjected to nonzero initial conditions. Design/methodology/approach: The discrete Fourier transform (DFT) theory is used to develop a spectral dynamic analysis method. The dynamic response of a linear system is assumed as the sum of the forced and free vibration response parts...
Purpose: ESMOS is a project financially supported by the SOCRATES/Minerva European Commission initiative, which aims to enhance student mobility through online support. The ESMOS partnership has explored existing practice in student mobility support, particularly investigating how technology is being utilised to support students. It has also examined the factors that affect exchange students and has...
Purpose: of this paper: A study of an automated laser autogenous welding process of butt joints of austenitic stainless steel AISI 321 sheets 0.5 [mm] and 1.0 [mm] thick using a high power diode laser HPDL has been carried out. Design/methodology/approach: Influence of basic parameters of laser welding on shape and quality of the butt joints and the range of optimal parameters of welding were determined...
Purpose: of this paper: The paper presents a concept of a system for off-line programming, simulation and remote supervision of the Mitsubishi Movemaster RV-M1 robot. Design/methodology/approach: In the software development process a robot installed in institute's laboratory has been used. The software has been coded in a high level programming language in a manner that allows future improvements...
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