Finite element simulation on shot peen forming the wing panel of commercial aircraft C919

Author:  Y.J. Wang, X.D. Xiao, J.B. Wang, W. Zhang, M.J. Qiao
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.342-347)
Doc ID:  2014100
Year of Publication:  2014
Abstract:  
A wing panel is usually shaped from a machined flat panel by using a shot peen forming process to meet its aerodynamic contour. It is essential to validate the formability of the wing panel and to develop the peen forming parameters as well as to compensate the machined flat panel. Many iterations are usually required to achieve the works. Reliable numerical simulations could reduce the time and the cost. In this paper, the ideal induced stress field is calculated directly from the desired panel shape in association with the shot peen forming processes. The calculated induced stresses are validated on a rectangular plate. The maximum deviation of the simulated curvatures of the plate is 4.12%. A FE simulation technique is proposed to simulate the deformation of aircraft wing panel and is performed on a wing panel of the commercial aircraft C919. The simulated contour is in good agreement with desired panel shape. The maximum contour deviation of the simulation without applying gravity load is 10 mm. The maximum contour deviation of the simulation with applying gravity load is 3.5 mm which is consistent with the experimentally measured values