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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2004, Vol. 25 ›› Issue (6): 606-610.

• 论文 • Previous Articles     Next Articles

Key Technology Research and System Development of Complex Aircraft Skin Stretch-forming Simulation

BAI Di, ZHOU Xian-bin, LI Dong-sheng, LIU Yi-cheng   

  1. Faculty 704, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2003-10-10 Revised:2003-12-22 Online:2004-12-25 Published:2004-12-25

Abstract: To pre-estimate the formability of complex aircraft skin parts and simulate the whole deformation processes, a finite element simulation system-STRETCHFORM is developed to assist the manufacture according to the stretch-forming feature of skin parts. The system is composed of three function modules—pre-processing, solving and post-processing, and key techniques including motion of mechanism, static implicit algorithm, contact and search algorithm as well as evaluation criterion of forming quality are analyzed and accomplished. Simulation of stretch-forming process for "S" shape skin and air inlet part are carried out, and it demonstrates the good precision and stability in comparison with the results of MARC, PAM-STAMP and experiment.

Key words: aircraft skin, stretch-forming, numerical simulation, static implicit algorithm, motion of mechanism