R&D Of Multiaxial Strain Fatigue Analysis Platform

At present, most of the parts in aerospace vehicles, nuclear power plants, pressure vessels, cars, are subjected to complex multiaxial fatigue. Therefore, in order to describe the failure mode of the components accurately and realistic, the features of multiaxial fatigue should be considered. However, it is difficult to predict the multiaxial fatigue life of the components because of complex of the mechanics:a large number of fatigue parameters should be queried, the analyzing and computing processes are complex. The traditional manual calculation are very complicated and time-consuming. As the strategy of "Internet Plus" has been promoted by the China government, the multiaxial strain fatigue analysis platform developed by combining the network technology and the theory of multiaxial fatigue analysis is not only a good tool to improve the work efficiency of the R & D personnel and the calculating accuracy of the results, but also supplies a good environment to share resource and work paperless.Firstly, multiaxial fatigue life prediction theories were reviews in this paper. Currently, under multiaxial constant amplitude and variable amplitude loading, fatigue life prediction steps are summarized. In this paper, Wang-Brown method was used to carry on multiaxial cycle count. Wang-Brown model was used to calculation of fatigue damage and Miner's theory was used to carry on accumulation of fatigue damage.Secondly, the platform is designed based on the Spring MVC design pattern. Under the development environment of Eclipse, the platform interface is designed by using JSP technology. The analysis program is written by using Java, which is one kind of the object-oriented programming language. The PostgreSQL database is selected to establish data tables. Finally, the platform is run and tested in the Tomcat server. Based on the progresses described above, a multiaxial strain fatigue platform based network was developed.Finally, The feasibility of the platform are verified by several engineering examples which subjects the constant amplitude load or the variable amplitude load. From results of the examples under different type of load, the multiaxial fatigue life of the components can be predicted accurately by using the developed analysis platform. The work of this paper is suitable for engineering application and a significant advantage of this work is to save the labor intensity of R & D personnel. The work of this paper will promote the development of the application the network technology in the field of multiaxial fatigue life prediction.