Tensile and shear strength for a self-drilling screw and transition of failure-modes and shear-strengths for self-drilling screwed connections at elevated-temperatures
Journal of Structural Fire Engineering
ISSN: 2040-2317
Article publication date: 15 December 2021
Issue publication date: 9 August 2022
Abstract
Purpose
The purpose of this study is to clarify both tensile and shear strength for self-drilling screws, which are manufactured from high-strength, martensitic-stainless and austenitic stainless-steel bars, and the load-bearing capacity of single overlapped screwed connections using steel sheets and self-drilling screws at elevated temperatures.
Design/methodology/approach
Tensile/shear loading tests for the self-drilling screw were conducted to obtain basic information on the tensile and shear strengths at elevated temperatures and examine the relationships between both. Shear loading tests for the screwed connections at elevated temperatures were conducted to examine the shear strength and transition of failure modes depending on the test temperature.
Findings
The tensile and shear strengths as well as the reduction factors at the elevated temperature for each steel grade of the self-drilling screw were quantified. Furthermore, either screw shear or sheet bearing failure mode depending on the test temperature was observed for the screwed connection.
Originality/value
The transition of the failure modes for the screwed connection could be explained using the calculation formulae for the shear strengths at elevated temperatures, which were proposed in this study.
Keywords
Acknowledgements
The authors thank Kamiyama-tekkosho Co. Ltd. for providing all drilling screws for the tests. The authors are also thankful for the valuable advice from Professor Dr. Ben Young at The Seventh International Conference on Structural Engineering, Mechanics and Computation 2019 in Cape Town for this study. Additionally, this research was funded by the Japan Iron and Steel Federation.
Citation
Ozaki, F., Liu, Y. and Ye, K. (2022), "Tensile and shear strength for a self-drilling screw and transition of failure-modes and shear-strengths for self-drilling screwed connections at elevated-temperatures", Journal of Structural Fire Engineering, Vol. 13 No. 3, pp. 321-346. https://doi.org/10.1108/JSFE-10-2021-0063
Publisher
:Emerald Publishing Limited
Copyright © 2021, Emerald Publishing Limited