Abstract Small computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. Software name is AlfaK. Developing process of the software was presented in previous papers of same authors, in this paper testing of the software was done using numerical analysis. To test accuracy of AlfaK software, analysis of stress concentration factors was done numerically using CATIA V5 commercial software for characteristic geometrical changes in form. Obtained data from numerical analysis are used for comparison with results from AlfaK, and on that way, accuracy of AlfaK software is investigated.

Abstract Computer software for analysis of stress concentration factors was developed at Faculty of Mechanical Engineering Sarajevo. The software name is AlfaK. To test AlfaK software, analysis of stress concentration factors was done by using various others computer software. In addition to AlfaK, analysis was performed using Microsoft Excel modules developed within the book [1]. The goal of this paper is to show that with a good knowledge of programming languages, small software applications can be developed for specific engineering problems, in order to avoid purchasing expensive software packages.

In this paper simulation model which enables quick analysis of elastic rotor natural frequency modes is developed using Matlab. This simulation model enables users to get dependency diagram of natural frequency in relation to diameter and length of the rotor,density of the material or modulus of elasticity. Testing of the model is done using numerical analysis in SolidWorks software.