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Material properties and residual stresses of cold-formed high strength steel hollow sections
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 1100MPa. 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.
Highlights Cold-formed high strength steel hollow sections were examined. Material characterizations were conducted through 66 tensile coupon tests. Cold-forming effects were investigated on halves of the three hollow sections. A new material model for high strength steel was proposed. Residual stresses on three sections were measured and reported.
Material properties and residual stresses of cold-formed high strength steel hollow sections
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 1100MPa. 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.
Highlights Cold-formed high strength steel hollow sections were examined. Material characterizations were conducted through 66 tensile coupon tests. Cold-forming effects were investigated on halves of the three hollow sections. A new material model for high strength steel was proposed. Residual stresses on three sections were measured and reported.
Material properties and residual stresses of cold-formed high strength steel hollow sections
Ma, Jia-Lin (author) / Chan, Tak-Ming (author) / Young, Ben (author)
Journal of Constructional Steel Research ; 109 ; 152-165
2015-02-16
14 pages
Article (Journal)
Electronic Resource
English
Residual Stresses in Cold‐Formed Square Hollow Sections of High Strength Steel
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