导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (10): 422847-422847.doi: 10.7527/S1000-6893.2019.22847

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Numerical simulation and deformation prediction of stress peen forming for integrally-stiffened panels

TIAN Shuo1,2,3, SHANG Jianqin1,2,3, GAI Pengtao1,2,3, CHEN Fulong1,2,3, ZENG Yuansong1,2,3   

  1. 1. AVIC Manufacturing Technology Institute, Beijing 100024, China;
    2. Aeronautical Science and Technologies Key Laboratory for Plastic Forming, Beijing 100024, China;
    3. Beijing Key Laboratory of Digital Plasticity Forming Technology and Equipment, Beijing 100024, China
  • Received:2018-12-11 Revised:2018-12-27 Online:2019-10-15 Published:2019-02-22
  • Supported by:
    National Project

Abstract: The integrally-stiffened panel, especially high stiffened integral panel, is commonly used in the aerospace industry due to its high structural efficiency, obvious weight loss benefits and good sealing effect. Stress peen forming is an effective process to induce curvatures in large-medium, long-life, high-performance complex integrally-stiffened panel. Numerical simulation is a promising approach that promotes the investigation, development and application in stress peen forming of integrally-stiffened panel. In order to simulate the stress peen forming of integrally-stiffened panel, a multi-shot impact finite element model based on response surface function, an reverse bending stress field simulation model based on strain neutral layer shifting to inner compression region and a stress peen forming RBF neural network prediction model are established. By applying these three models, the numerical simulation of stress field method, the high-precision numerical simulation and deformation prediction of stress peen forming for integrally-stiffened panel are realized. The present study provides a more convenient, efficient and economical way for the research and application of the stress peen forming process for integrally-stiffened panel.

Key words: integrally-stiffened panel, shot peening, stress peen forming, strain neutral layer, finite element method, RBF artificial neural network, deformation prediction

CLC Number: