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Title: Strain-based J-estimation scheme for fracture assessment of misaligned clad pipelines with an interface crack
Authors: Zhao, Hai-Sheng
Lie, Seng-Tjhen
Zhang, Yao
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Zhao, H.-S., Lie, S.-T., & Zhang, Y. (2018). Strain-based J-estimation scheme for fracture assessment of misaligned clad pipelines with an interface crack. Marine Structures, 61, 238-255. doi:10.1016/j.marstruc.2018.06.006
Journal: Marine Structures
Abstract: A reference strain J-estimation formulation is developed to perform the fracture assessment of misaligned clad pipelines containing a circumferential part-through crack located at the interface of weld metal and outer pipe. An extensive parametric study including a total of 896 finite element (FE) models is carried out to investigate the effects of various parameters (pipe diameter, crack depth, crack length, centreline offset, strength mismatch level, and strain hardening exponent) on the J-integral. Then, the estimation formulation characterizing the linear relationship between the J-integral and the applied displacement loading is proposed using the standard least square fitting, and a goodness of fit for the J-integral values obtained from the formulation and the FE analysis is endorsed. Finally, the application range of the estimation formulation is mostly extended by conducting further comparative study.
ISSN: 0951-8339
DOI: 10.1016/j.marstruc.2018.06.006
Rights: © 2018 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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