Development of an information system for determination of elastic-plastic boundary of rods of rolled profiles

An information system for determination of elastic-plastic boundary of rods of rolled profiles was developed. Rods of rolled profiles are widely used in mechanical engineering and in the space industry specifically. There were no analytical methods that allow determining the elastic-plastic boundary of torsion rod until recently. Numerous experiments were necessary to determine the boundaries of the rods for different profiles for different torsional moments. The authors derived analytical expressions allowing to calculate the elastic-plastic boundary of rods of rolled profiles whose profile is limited by piecewise smooth curves. These formulas are given in this article. Computer programs are written based on the derived analytical expressions and the certificates of state registration of software are obtained. An information system for determination of elastic-plastic boundary of rods of rolled profiles was developed based on these computer programs. Use of the information system will reduce the time of the survey; increase the accuracy and reliability of the results. There is no need in expensive equipment for determination of elastic-plastic boundary of rods of rolled profiles due to information system. An information system for determination of elastic-plastic boundary of rods of rolled profiles on the platform of Google App Engine in Python has been developed. An open library of symbolic computation SymPy was used in the development of information system.