Block shear strength in thin-walled lean duplex stainless steel fillet welded connection with base metal fracture
- Title
- Block shear strength in thin-walled lean duplex stainless steel fillet welded connection with base metal fracture
- Author
- 김태수
- Keywords
- Lean duplex stainless steel; Fillet welded connection; Block shear; Strain hardening; Stress triaxiality effect; Steel connection
- Issue Date
- 2021-09
- Publisher
- ELSEVIER SCIENCE INC
- Citation
- In Structures January 2022 35:1243-1255
- Abstract
- This paper investigates the accuracy of different design equations given in design specifications and literatures in
determining the block shear strength of the lean duplex stainless steel fillet welded connections with base metal
fracture. It points out the problem inherent in the block shear provision specified in the North American cold-
formed design specification, which does not consider shear strain hardening. The previous test results have
found that full shear strain hardening can be assumed for the carbon steel and ferritic stainless steel welded
connections, but not applicable to the thin-walled lean duplex stainless steel welded connections with a higher
ratio of the tensile strength to yield stress. Based on the results of finite element analysis including ductile
damage simulation, this study reveals that the block shear strength of the lean duplex stainless steel specimens
can be determined accurately using the mean between the shear yield stress and the shear ultimate stress. This
paper also investigates the effect of stress triaxiality incorporated in the block shear equations found in the
literature through comparative analysis with the bolted connection. The effect is shown to be negligible for the
thin-walled lean duplex stainless steel welded connection, although higher stress triaxiality is developed in
welded connection than in bolted connection. This paper recommends a block shear equation assuming the
normal tensile stress in the net area in conjunction with partial shear strain hardening. The recommended
equation was found to be more accurate than other equations for determining the block shear strength of the
thin-walled lean duplex stainless steel welded connections.
- URI
- https://www.sciencedirect.com/science/article/pii/S2352012421008596https://repository.hanyang.ac.kr/handle/20.500.11754/170439
- ISSN
- 2352-0124
- DOI
- 10.1016/j.istruc.2021.09.012
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ARCHITECTURE(건축학부) > Articles
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