Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154761
Title: Structural fatigue investigation of transverse surface crack growth in rail steels and thermite welds subjected to in-plane and out-of-plane loading
Authors: Liu, Yang
Tsang, Kin Shun
Hoh, Hsin Jen
Shi, Xiaopeng
Pang, John Hock Lye
Keywords: Engineering::Mechanical engineering
Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Liu, Y., Tsang, K. S., Hoh, H. J., Shi, X. & Pang, J. H. L. (2020). Structural fatigue investigation of transverse surface crack growth in rail steels and thermite welds subjected to in-plane and out-of-plane loading. Engineering Structures, 204, 110076-. https://dx.doi.org/10.1016/j.engstruct.2019.110076
Journal: Engineering Structures
Abstract: This study investigates the structural fatigue crack growth behavior of observed transverse surface cracks in rail steel and thermite weld subjected to in-plane and out-of-plane loading. Stress Intensity Factor (SIFs) solutions were derived from finite element model analysis for transverse surface cracks located at five different crack initiation locations in the cross-section of rail steel and thermite weld. The SIFs were presented by the conventional geometry factor Y and weld magnification factor Mk solutions for rail steel and thermite weld. Fracture toughness and fatigue crack growth rate tests were conducted to determine the mechanical properties of thermite weld materials and are compared with reported data for rail steels (R260 and R350HT). Fatigue crack growth prediction algorithm was developed using the coupled root mean square integration approach and was compared with the conventional uncoupled two-degree of freedom approach for semi-elliptical surface crack growth in the depth and surface directions respectively. The fatigue crack growth algorithm and propagation life prediction provide valuable observations on the crack shape evolution. It proves that out-of-plane bending loading is a more significant failure mode as compared to in-plane bending loading for thermite weld joints at curve tracks. Fatigue crack propagation results provide fatigue stress range-life curves for weld-toe surface cracks initiated at the head-to-web region of thermite welded joint structure.
URI: https://hdl.handle.net/10356/154761
ISSN: 0141-0296
DOI: 10.1016/j.engstruct.2019.110076
Rights: © 2019 Elsevier Ltd. All rights reserved
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles
MAE Journal Articles

SCOPUSTM   
Citations 20

12
Updated on Jan 29, 2023

Web of ScienceTM
Citations 20

9
Updated on Jan 22, 2023

Page view(s)

47
Updated on Jan 28, 2023

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.