Energy principle and material removal sequence optimization method in machining of aircraft monolithic parts
| Autor: | Liang Li, Longxin Fan, Yinfei Yang, Hui Tian, Ning Han, Xiaoyue Li, Guolong Zhao, Ning He |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Aircraft monolithic part Aerospace Engineering Mechanical engineering 02 engineering and technology 01 natural sciences 010305 fluids & plasmas 020901 industrial engineering & automation Low distortion Machining Residual stress 0103 physical sciences medicine Free energy principle Strain energy Motor vehicles. Aeronautics. Astronautics Mechanical Engineering Sequence optimization Elastic energy Stiffness Material removal Distortion TL1-4050 Initial residual stress medicine.symptom Material removal sequence |
| Zdroj: | Chinese Journal of Aeronautics, Vol 33, Iss 10, Pp 2770-2781 (2020) |
| ISSN: | 1000-9361 |
| Popis: | In the machining process of aircraft monolithic parts, the initial residual stress redistribution and structural stiffness evolution often lead to unexpected distortions. On the other hand, the stress redistribution and stiffness reduction during the machining process depend on the material removal sequence. The essence of the stress redistribution is releasing the initial elastic strain energy. In the present study, the influence of the material removal sequence on the energy release is studied. Moreover, a novel optimization method is proposed for the material removal sequence. In order to evaluate the performance of the proposed method, the mechanism of the machining distortion is firstly analyzed based on the energy principle. Then a calculative model for the machining distortion of long beam parts is established accordingly. Moreover, an energy parameter related to the bending distortion and the procedure of the material removal sequence optimization is defined. Finally, the bending distortion analysis and material removal sequence optimization are performed on a long beam with a Z-shaped cross-section. Furthermore, simulation and experiments are carried out. The obtained results indicate that the optimized sequence results in a low distortion fluctuation and decreases the bending distortion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|