Failure assessment of cracked uni-planar square hollow section T-, Y- and K-joints using the new BS 7910 : 2013+A1:2015

Sukumara Pillai, Vipin and Kolios, Athanasios and Lie, Seng Tjhen (2018) Failure assessment of cracked uni-planar square hollow section T-, Y- and K-joints using the new BS 7910 : 2013+A1:2015. Archive of Applied Mechanics. pp. 1-11. ISSN 0939-1533 (https://doi.org/10.1007/s00419-018-1423-5)

[thumbnail of Pillai-etal-AAM2018-Failure-assessment-cracked-uni-planar-square-hollow-section-T-Y-K-joints]
Preview
Text. Filename: Pillai_etal_AAM2018_Failure_assessment_cracked_uni_planar_square_hollow_section_T_Y_K_joints.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo

Download (1MB)| Preview

Abstract

This paper covers the validation of standard safety assessment procedure in the new BS 7910:2013+A1:2015 for cracked uni-planar square hollow section (SHS) T-, Y- and K-joints using the finite element analyses. The procedure is based on the failure assessment diagram (FAD) method. A completely new and robust finite element mesh generator is developed, and it is validated using the full-scale experimental test results. FAD curves are constructed using the elastic J-integral ((Formula presented.)), the elastic-plastic J-integral ((Formula presented.)) and the plastic collapse load ((Formula presented.)) values calculated using the 3D cracked models of the joints. The results reveal that the standard Option 1 FAD curve of the new BS code is not always safe in assessing the safety and integrity of cracked uni-planar SHS joints. Therefore, a penalty factor of 1.2 for plastic collapse load is recommended to move all the constructed Option 3 FAD curves above the standard Option 1 curve. The new Option 3 FAD curves are found to generate optimal solutions for cracked uni-planar SHS T-, Y- and K-joints.