Study on Finite Element Method for Solving Stress Concentration Problem

Stress concentration is a complex problem in material mechanics, especially in Aeronautics and Astronautics applications, the concentrated stress will do great harm to the safe operation of the launch vehicle. Therefore, it is a common practice to simulate and verify the structural design or manufacturing process in the use of materials and dynamics. This paper first introduces the problem of stress concentration in aerospace, demonstrates the necessity and importance of studying this problem, at the same time, puts forward a stress concentration solution based on finite element method, which simplifies the geometric model by using symmetrical characte-ristics, so as to reduce the batch data of analysis. Compared with the conventional analysis using Patran and NASTRAN, its geometric model has a higher degree of discretization, The superiority and reliability of this method are verified by two examples. The results show that this finite element method is more accurate and effective in dealing with stress concentration problems, especially complex geometric models, and has high value for engineering practice.