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Analysis of shape defects during flexible roll forming of steel/aluminum double-layered blanks.

Authors :
Woo, Young Yun
Oh, Il Yeong
Hwang, Tae Woo
Moon, Young Hoon
Source :
International Journal of Material Forming; Nov2020, Vol. 13 Issue 6, p861-872, 12p
Publication Year :
2020

Abstract

Flexible roll forming is an advanced sheet-metal-forming process that allows the production of parts with variable cross-sections. Double-layered blanks can have enhanced properties such as a high stiffness-to-weight ratio and high corrosion resistivity when combined with suitable materials. However, in the flexible-roll-forming process of double-layered blanks, additional shape defects and interface delamination can occur owing to their inhomogeneous mechanical properties compared with those of single-layered blanks. In this study, investigations on shape defects generated during the flexible-roll-forming process of steel/aluminum double-layered blanks were performed. Shape defects such as web-warping, wrinkling, and delamination at the interface were investigated on three different blanks with trapezoidal, convex, and concave shapes. The results show that the process-induced longitudinal strains significantly affect the occurrence of shape defects. Moreover, the longitudinal strains strongly depend on the blank shapes, their stacking order, and mechanical properties of the constituent layers. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19606206
Volume :
13
Issue :
6
Database :
Complementary Index
Journal :
International Journal of Material Forming
Publication Type :
Academic Journal
Accession number :
146531724
Full Text :
https://doi.org/10.1007/s12289-019-01504-4