Please use this identifier to cite or link to this item:
Title: Analysis of the size effect on springback behavior in micro-scaled U-bending process of sheet metals
Authors: Wang, J
Fu, M 
Ran, J
Issue Date: 2014
Source: Advanced engineering materials, 2014, v. 16, no. 4, p. 421-432
Abstract: In the micro-bending process of sheet metals, springback caused by the considerable elastic recovery during unloading has a significant effect on the dimension precision of micro-bent sheet metal parts. In design of micro-bent parts and bending process, this phenomenon needs to be considered. However, the traditional well-established knowledge for analysis of macro-scaled sheet metal bending processes may not be very suitable and efficient in analysis of micro-scaled sheet metal bending due to the geometry and microstructure size effects in the process. To explore the unloading springback of sheet metals after micro-bending, the experimental studies on the interactive influence of a few significant parameters including sheet thickness, grain size, and punch radius on the springback in micro U-bending process of copper alloy sheets were conducted. An appropriate constitutive model based on the surface layer model, which is widely used in micro-scaled forming processes, is proposed to predict the amount of springback and the relationship among these parameters is further established. The research shows that the springback angle generally increases with the decreasing sheet thickness, and for different punch radii, the springback angle has different variation trends for the sheet metals with different grain sizes. The developed analysis method is verified via the comparison of the calculated stress–strain curves with the tensile test results of three kinds of copper alloy sheets. The findings on how the size effects affect the springback behaviors of in micro-bending process are validated by the experimental results, finite element simulation, and the comparison in-between.
Publisher: Wiley-VCH
Journal: Advanced engineering materials 
ISSN: 1438-1656
EISSN: 1527-2648
DOI: 10.1002/adem.201300275
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Jan 31, 2020


Last Week
Last month
Citations as of Sep 22, 2020

Page view(s)

Last Week
Last month
Citations as of Sep 23, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.