Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8241
Title: Material properties and residual stresses of cold-formed high strength steel hollow sections
Authors: Ma, JL
Chan, TM
Young, B
Keywords: Cold-formed steel
High strength steel
Hollow section
Material characterization
Residual stress
Issue Date: 2015
Publisher: Elsevier Ltd
Source: Journal of constructional steel research, 2015, v. 109, p. 152-165 How to cite?
Journal: Journal of Constructional Steel Research 
Abstract: Abstract This paper presents the experimental investigation on the material properties and residual stress distributions of cold-formed high strength steel hollow sections. The nominal yield stresses (0.2% proof stresses) of the hollow sections were 700, 900 and 1100 MPa. The sections were composed of 9 square hollow sections, 2 rectangular hollow sections and 6 circular hollow sections. 66 tensile coupons were tested to determine the modulus of elasticity, 0.2% tensile proof stress, ultimate tensile strength and elongation at fracture of the material. The results were also compared with the American, Australian and European standards. Based on the Ramberg-Osgood expression, a new constitutive model for high strength steel material is proposed. On three of the hollow sections, strength variation and cold-forming effect were studied by testing coupons extracted from different locations of the cross-sections. Residual stresses were also investigated both in longitudinal and transverse directions on three hollow sections using wire-cutting method. A total number of 82 longitudinal strips and 3 transverse rings were cut from the original sections.
URI: http://hdl.handle.net/10397/8241
ISSN: 0236-5731
DOI: 10.1016/j.jcsr.2015.02.006
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