Mirosław Głowacki

The main goal of the paper is modelling of phenomena accompanying the steel subjected to deformation in very high temperature. Analysis of the phenomena in solid surface part and semi-solid core is necessary due to inhomogeneity of material properties in both the zones of the sample. Experimental basis of the work were TESTS done in IMZ Gliwice using Gleeble 3800 physical simulator. The interpretation of the tests was done using Def_Semi_Solid software. This program allows the numerical analysis of steel behaviour during deformation of axial-symmetrical samples at very high temperatures. The paper presents the comparison of experimental and numerical results.

In this paper the digital image analysis of voids formed during the deformation of steel samples in the GLEEBLEE 3800 physical simulator device with the semi-solid core. The presented and characterized indicators describe the shape of voids, and their relative position as qualifiers quality indicators as well as the correlation between the indicators and possible defects in the material. The paper contains the results and discussion of presented analysis.

This paper shows example results of computer simulations supporting the production process of sink. Design and verification of deep drawing process and tools design were carried out using finite element models implemented in Inventium Suite. Wrinkling and fracture of the material were the main phenomena subjected to the investigation using numerical analysis. A number of computer simulations were carried out in order to eliminate defects and analyze the shape of the final product.

The paper deals with the speed up of a computer program, which simulates rolling of steel with semi-solid zone. The mathematical models describing the rolling process are fully three dimensional. It leads to very long computation time while the discretization of the problem is made in finite element manner. The main objectives of the contribution are optimization of the program code, as well as making of the first look at possibilities of parallel computation in application to the presented problem. The paper has proved that efficient optimization of the program code can lead to significant shortening of the computation time also with the automatic and manual parallelization. It was concluded that adaptation of the procedures and loops to rigorous requirements of the parallel compiler is strongly recommended.

The paper summarizes the system for WEB resources monitoring based on defined query. Experiment compares results returned by the proposed system to those provided by Google Search and Google Alert services. Results indicate that the system could be solid base for development and tests of pattern detection and information retrieval mechanism, while providing more data than Google solutions. Drawback of system and further development plans are also presented.

W artykule przedstawiono koncepcję, architekturę oraz testy mobilnego systemu monitoringu zbiorników wodnych. Jego głównymi elementami są zdalnie sterowana łódź oraz echosonda rejestrująca dodatkowo dane GPS. Opracowany system może być wykorzystywany w kilku konfiguracjach, umożliwiając realizację funkcjonalności takich jak generowanie map batymetrycznych lub bieżący monitoring dna zbiornika wodnego. Główne funkcjonalności systemu zostały przetestowane i zaprezentowane wraz rezultatami testów, ich analizą, wnioskami i planem dalszego rozwoju.

In studies of new materials or products, it is necessary to carry out a series of tests to determine the physical properties of the product as a function of the manufacturing process parameters. The technological process of making successive samples for both experimental and research purposes is a mechanism which is time-consuming and which usually requires considerable financial outlays. At the same time, scientific literature offers a large number of experimental results carried out for a similar range of problems. The idea conceived in this study is to create a model that, based on the results of experiments collected from the scientific literature, will reduce the number of necessary physical tests by replacing them with an effective mechanism estimating some of the technological process parameters. Consequently , the concept of an algorithm has been presented to estimate the parameters of the manufacturing process of ADI (Austempered Ductile Iron). It can operate as a fundamental part of a larger expert system, supporting the design and configuration of production processes in various industries. This article describes the results of tests showing the efficiency of the proposed solution and outlines plans for further development of the system to increase its effectiveness and usefulness.