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Wrinkling prediction for GPa-grade steels in sheet metal forming process

Title
Wrinkling prediction for GPa-grade steels in sheet metal forming process
Author
윤종헌
Keywords
Wrinkling; GPa-grade steels; Sheet metal forming; Crash forming
Issue Date
2019-06
Publisher
SPRINGER LONDON LTD
Citation
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, v. 102, No. 9-12, Page. 3849-3863
Abstract
This paper newly proposes a phenomenological wrinkling criterion to predict the formation of severe wrinkling in GPa-grade steels by adopting a critical amount of compressive strain with respect to the specific triaxiality and the geometrical bending strain, which were updated incrementally. To enhance the accuracy of the wrinkling criterion during the sheet metal forming process, the non-flange and flange wrinkling criteria were separately applied to the adapted region, which was distinguished from the entire domain by checking the blank holding pressure (BHP) caused by the contact pressure between the sheet and binder, systematically. The proposed wrinkling criterion exhibits superior performance in the prediction of experimental wrinkles that occur in the B-pillar and crash forming with a TRIP1180 sheet when compared with conventional criteria such as geometrical bending strain, thickness strain, and potential wrinkling.
URI
https://link.springer.com/article/10.1007%2Fs00170-019-03518-3https://repository.hanyang.ac.kr/handle/20.500.11754/116419
ISSN
0268-3768; 1433-3015
DOI
10.1007/s00170-019-03518-3
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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