Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijpvp.2013.01.004
Title: Failure assessment diagrams for circular hollow section X- and K-joints
Authors: Qian, X. 
Keywords: Area reduction factor
Circular hollow section
Energy release rate
Failure assessment diagram
Issue Date: Apr-2013
Source: Qian, X. (2013-04). Failure assessment diagrams for circular hollow section X- and K-joints. International Journal of Pressure Vessels and Piping 104 : 43-56. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijpvp.2013.01.004
Abstract: This paper reports the failure assessment curves for semi-elliptical surface cracks located at hot-spot positions in the circular hollow section X- and K-joints. The failure assessment curves derive from the square root of the ratio between the linear-elastic and the elastic-plastic energy release rates, computed from the domain-integral approach. This study examines both the material and geometric dependence of the failure assessment curves. The area reduction factor, used in defining the strength of the cracked joints, imposes a significant effect on the computed failure assessment curve. The failure assessment curves indicate negligible variations with respect to the crack-front locations and the material yield strength. The crack depth ratio exerts a stronger effect on the computed failure assessment curve than does the crack aspect ratio. This study proposes a parametric expression for the failure assessment curves based on the geometric parameters for surface cracks in circular hollow section X- and K-joints. © 2013 Elsevier Ltd.
Source Title: International Journal of Pressure Vessels and Piping
URI: http://scholarbank.nus.edu.sg/handle/10635/59057
ISSN: 03080161
DOI: 10.1016/j.ijpvp.2013.01.004
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