Papers by Author: Ibolya Zsoldos

Abstract: In order to simulate the polyhedral grain nucleation in alloys, 3-D cell population growth processes are studied in space-filling periodic cellular systems. We discussed two different methods by which space-filling polyhedral cellular systems can be constructed by topological transformations performed on “stable” 3-D cellular systems. It has been demonstrated that an infinite sequence of stable periodic space-filling polyhedral systems can be generated by means of a simple recursion procedure based on a vertex based tetrahedron insertion. On the basis of computed results it is conjectured that in a 3-D periodic, topologically stable cellular system the minimum value of the average face number 〈f〉 of polyhedral cells is larger than eight (i.e. 〈f〉 > 8). The outlined algorithms (which are based on cell decomposition and/or cell nucleation) provide a new perspective to simulate grain population growth processes in materials with polyhedral microstructure.

Abstract: We want to help to the technical preparation of the implantation of individual prosthesis by using the newest means of computer aided manufacturing. There are such cases when the factory-made implantations available are not suitable to replace the missing bone or joint. We have solved the replacement of an osteal skull defect with the Rapid Prototyping method in this paper. The advanced techniques has assured greater accuracy and simpler operative-technique in this case.

Abstract: A computer algorithm based on a topological model has been created to determine the tensile strength of glass metals in a theoretical way.