Stress Analysis on the Stretch Forming of the Aluminum Saddle-Shaped Skins


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The stretch forming applied force during the forming process and exceed the yield stress of the raw material to make the part deforming plastically, and fitting the contour of a form block, then the purpose of forming can be reasonably achieved. The saddle-shaped skin located in the mating area between the vertical stabilizer and the empennage. This study investigates the stress distribution on the stretch forming of saddle-shaped skins. First, apply the FEM software-ABAQUS to analyses the stretch forming of saddle-shaped skin. Then use the statistical method to analysis the stress in different forming conditions. Finally, the stress of saddle-shaped skins on the critical location is analyzed and discussed. This study aims to modify the process parameters in advance to prevent the failure and defects of skin and provide valuable information for both production engineer and tool designer to improve their design of process parameters and form block.



Advanced Materials Research (Volumes 89-91)

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu




C. K. Huang et al., "Stress Analysis on the Stretch Forming of the Aluminum Saddle-Shaped Skins", Advanced Materials Research, Vols. 89-91, pp. 703-708, 2010

Online since:

January 2010




[1] Lange Kurt, Handbook of Metal Forming, Southeast Book Company (1985), pp.215-223.

[2] Woo H., Forming technology of double-curvature skins, Aviation Manufacturing Technology, Vol. 3(2002), pp.55-57. (in Chinese).

[3] Metha H. S., Kobayashi S., Finite Element Analysis and Experimental Investigation of Sheet Metal Stretching, Rep. No. MD 71-2, University of California, USA (1971).

[4] Kim J. H., Oh S. I., Kobayashi, S., Analysis of Stretching of Sheet Metals with Hemispherical Punch, International Journal of Machine Tool Design Research, Vol. 18(1978), pp.209-218.


[5] Sigert K. et al., Prediction of the final part properties in sheet metal forming by CNC-controlled stretch forming, Journal of materials processing technology, Vol. 71(1997), pp.141-146.


[6] Lin S. P., Application of DEFORM-2D and DEFORM-3D in simulation of metal forming, Mould Technology, Vol. 3(2000), pp.75-80. (in Chinese).

[7] Im Yong-Tai, Walczyk Daniel F., A comparison of pin actuation schemes for large-scale discrete dies, Journal of Manufacturing Processes, Vol. 2, No. 4 (2000), pp.247-257.


[8] Metal Forming with ABAQUS, Hibbitt, Karlesson & Sorensen, Inc. (1997).