Size effect in gas forming a hot-bent AA5xxx V-shaped trough trimmed for an airplane strakelet skin panel

Superplastic forming or gas forming is favorable method for the manufacture of sheet metal for making airplane skin panels. However, a major challenge in applying this method is controlling the thickness distribution in the formed product. Here, we explore a hot-bending-assisted process for gas form...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2016-10, Vol.86 (9-12), p.2747-2752
Main Authors: Lee, Shyong, Tang, Jung-Sung, Chu, Chun-Lin
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Contours
Engineering
Industrial and Production Engineering
Mechanical Engineering
Media Management
Metal sheets
Original Article
Plastic buckling
Shape
Size effects
Superplastic forming
Superplasticity
Thickness
Wings (aircraft)
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Summary:Superplastic forming or gas forming is favorable method for the manufacture of sheet metal for making airplane skin panels. However, a major challenge in applying this method is controlling the thickness distribution in the formed product. Here, we explore a hot-bending-assisted process for gas forming of a deep trough with a complex shape for use in airplane wings. We propose the deliberate arrangement of wrinkles to achieve uniform thickness distribution. Because full-scale experiments are costly, sub-scale specimens are preferred for collecting experimental data. In linking sub-scale data to full-scale manufacturing, the size effect on wrinkle formation sites is important. The cause of the pre-form contour and larger-size specimen could be the greater variations in contour modes due to plastic buckling during the pre-forming stage.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-016-8380-3