Desenvolvimento de um programa para dimensionar parafusos pré carregados sob esforços axiais em junções parafusadas

Abstract

From design to the assembly phase of machinery, equipment and metallic structures, for example, there has always been a need to join components using fasteners. One of the most used fastening elements in these connections are screws, which allow bolted connections between components. Due to the importance of these unions for a good functioning between the joined elements, the project is necessary to guarantee the effectiveness and safety of the screws in relation to the efforts to which these bolted unions are subjected and depending on the configurations of active efforts, it becomes complex , slow, unproductive and with more possibilities of errors the sizing of these elements done manually. Faced with this screw sizing problem, aiming at agility in sizing and didactic and commercial use, this work uses Typescript, React Js, Electron Js technologies, as well as other web and desktop development technologies to develop a program to size preloaded screws in bolt joints subjected to static or dynamic axial forces, showing the user the stiffness constant of the bolted joint, the safety factors against joint separation, against bolt yielding and against failure of the bolt due to fatigue, in the case of dynamic loads, in addition to presenting graphs of these safety factors as a function of the preload applied to the screws. The sizing calculation methodology was acquired from renowned literature and passed on to algorithms made in Typescript, using the idea of Clean Architecture, where the algorithms to perform the calculations are separate and independent of the graphical interface, ensuring greater ease of maintenance and scalability of the algorithms of these codes, and the algorithms to create the program's interface. As a result, through the technologies used, it was possible to create a modern, intuitive, easy-to-use interface with almost instantaneous calculation resolution. As the screw sizing calculation method was taken from the literature, in the results, there was a comparison between the responses from the literature and the software, where the results converged without problems, both in values and in the graphs presented.