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An empirical model for bending capacity of defected pipe combined with axial load

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Main Author: Phan, Hieu Chi
Other Authors: Le, Tien-Thinh
Format: Article
Language:English
Published: International Journal of Pressure Vessels and Piping 2021
Subjects:
Defected pipe
Corrosion
Bending capacity
Empirical model
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S0308016121000661?via%3Dihub#kwrds0010
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1773
https://doi.org/10.1016/j.ijpvp.2021.104368
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spelling oai:localhost:PNK-17732022-08-17T05:54:43Z An empirical model for bending capacity of defected pipe combined with axial load Phan, Hieu Chi Le, Tien-Thinh Bui, Nang Duc Duong, Huan Thanh Pham, Tiep Duc Defected pipe Corrosion Bending capacity Empirical model Q1 Buried pipes suffer from various natural and human-related phenomena leading to the bending forces on such structures. The analytical models face obstacles such as the complications in modeling material behavior and the local stress concentration due to the appearance of defects are combined. This causes the accumulative over and under-estimation of pipe capacity due to the idealizations of full plastic stress distribution and location of defects at the most dangerous area, respectively. Consequently, such models are not appropriate in the case that defects are not located on the bending plane. The Finite Element, FE, approach is used to overcome these difficulties with the appearance of defects is randomly propagated around the pipe. Additionally, the bilinear material model is also applied accounting for the shape of actual stress-strain curves in a simplified manner. Various Finite Element Analyses are conducted consequently to have an extensive FE database with 772 samples labeled by the bending capacity of the corresponding pipe. To avoid the difficulties for users due to the requirement of coding skill, statistics, and advanced mathematics knowledge, and the implicit appearance of the conventional data-driven models, an empirical model, which can be explicitly expressed, has been developed. The main process of developing such a model is to optimize the design variables in the reduction factors. The objective function is chosen as the Mean Absolute Error of the predicted versus simulated reduction factor. The proposed model has been validated with the high accuracy of R-square at 0.9929 on the test set reveals an improvement compared to other available models. 2021-06-15T07:11:12Z 2021-06-15T07:11:12Z 2021 Article Working Paper https://www.sciencedirect.com/science/article/abs/pii/S0308016121000661?via%3Dihub#kwrds0010 https://dlib.phenikaa-uni.edu.vn/handle/PNK/1773 https://doi.org/10.1016/j.ijpvp.2021.104368 en International Journal of Pressure Vessels and Piping
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic Defected pipe
Corrosion
Bending capacity
Empirical model
spellingShingle Defected pipe
Corrosion
Bending capacity
Empirical model
Phan, Hieu Chi
An empirical model for bending capacity of defected pipe combined with axial load
description Q1
author2 Le, Tien-Thinh
author_facet Le, Tien-Thinh
Phan, Hieu Chi
format Article
author Phan, Hieu Chi
author_sort Phan, Hieu Chi
title An empirical model for bending capacity of defected pipe combined with axial load
title_short An empirical model for bending capacity of defected pipe combined with axial load
title_full An empirical model for bending capacity of defected pipe combined with axial load
title_fullStr An empirical model for bending capacity of defected pipe combined with axial load
title_full_unstemmed An empirical model for bending capacity of defected pipe combined with axial load
title_sort empirical model for bending capacity of defected pipe combined with axial load
publisher International Journal of Pressure Vessels and Piping
publishDate 2021
url https://www.sciencedirect.com/science/article/abs/pii/S0308016121000661?via%3Dihub#kwrds0010
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1773
https://doi.org/10.1016/j.ijpvp.2021.104368
_version_ 1751856251867758592
score 8.891145

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