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Fatigue behavior of very high strength (VHS) circular steel tube to plate T-joints under in-plane bending
journal contribution
posted on 2023-05-17, 18:19 authored by Jiao, H, Mashiri, F, Zhao, X-LThis paper investigated the fatigue behavior of very high strength (VHS) steel tubes (t < 2 mm) to steel plate T-joints under cyclic in-plane bending. VHS tubes, with a yield stress of 1350 MPa and an ultimate tensile strength of 1500 MPa, were welded to G350 steel plates using the GTAW welding method. Three different failure modes were observed. Stress concentration factors (SCFs) ranging from 1.2 to 2.2 were obtained through linear extrapolation at the weld toe. The fatigue life of VHS (t < 2 mm) to plate T-joints subject to in-plane bending was determined using the hot spot stress approach with a stress concentration factor SCF = 2.0 and the existing fatigue design equation in CIDECT Design guide No. 8. VHS tubes (t < 2 mm) showed better fatigue life than cold formed CHS (2 mm ≤ t < 4 mm) to plate T-joints when welded to plates and loaded under in-plane bending. A class of 102 was proposed for fatigue design of VHS-plate T-joints under in-plane bending based on the current steel design standards.
History
Publication title
Thin-Walled StructuresVolume
68Pagination
106-112ISSN
0263-8231Department/School
School of EngineeringPublisher
Elsevier Sci LtdPlace of publication
The Boulevard, Langford Lane, Kidlington, Oxford, England, Oxon, Ox5 1GbRights statement
Copyright 2013 Elsevier Ltd.Repository Status
- Restricted