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An experimental investigation of edge strain and bow in roll forming a V-section

journal contribution
posted on 2023-10-26, 04:21 authored by Buddhika Abeyrathna, Bernard RolfeBernard Rolfe, Peter HodgsonPeter Hodgson, Matthias WeissMatthias Weiss
V-sections were roll formed from two grades of steel, and the strain on the top and bottom of the strip near the edge was measured using electrical resistance strain gauges. The channels were bent to a radius of 2 and 15 mm along the centerline. The steel strips were of mild and dual phase steel of yield strength 367 MPa and 597 MPa respectively. The longitudinal bow was measured using a 3-dimensional scanning system. The strain measurements were analysed to determine bending and mid-surface strains at the edge during forming. The peak longitudinal edge strain increased with material yield strength for both profile radii. For the 15 mm radius, the bow was larger in the dual phase steel than in the mild steel. For the 2 mm profile radius, the bow was smaller compared with the 15 mm profile radius and it was similar for both steels. It was observed that the difference between the peak longitudinal edge strain and yield strength to Youngs modulus ratio of the material is an important factor in determining longitudinal bow.

History

Journal

Materials science forum

Volume

773-774

Pagination

153 - 159

Location

Durnten-Zurich, Switzerland

ISSN

0255-5476

Language

eng

Publication classification

C1 Refereed article in a scholarly journal; C Journal article

Copyright notice

2014, Trans Tech Publications

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