Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas

This paper develops a new practical framework of high-cycle fatigue (HCF) probability analysis of local welded plate joints considering the uncertainty in Arctic areas. The framework includes 1) a meta-model of the local energy concentration factor relying on the genetic algorithm and neural network...

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Main Authors: Feng, Liuyang, Zhang, Limao, Liao, Xiaowei, Zhang, Wei
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/154567
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1545672021-12-28T07:14:28Z Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas Feng, Liuyang Zhang, Limao Liao, Xiaowei Zhang, Wei School of Civil and Environmental Engineering Engineering::Civil engineering Probability Analysis High-Cycle Fatigue This paper develops a new practical framework of high-cycle fatigue (HCF) probability analysis of local welded plate joints considering the uncertainty in Arctic areas. The framework includes 1) a meta-model of the local energy concentration factor relying on the genetic algorithm and neural network (GA-NN) approach, 2) the identification of uncertainties in the fatigue assessment procedure, and 3) the probability analysis relying on the Monte Carlo simulation with Latin hypercube sampling method. The GA-NN determines the interactive relationship among the geometrical properties for a good estimation of the energy-based indicator concentration factor. The probability analysis considers the uncertainty caused by the meat-model, the local welding geometry, the Young modulus under different temperatures, and the combination of the ice and wave loadings. To determine the uncertainties involved in probability analysis, this study conducts a series of experimental measurements and high-cycle fatigue tests of cruciform welded plate joints. Furthermore, this study discusses the effect of the ice loading, maximum wave stress, and main plate thickness of welded plate joints on the expected fatigue life. The additional ice loading on the welded plate joints can almost cut the expected fatigue life in 33% in comparison with that only under wave loadings, implying the necessity of considering ice loading in Arctic areas. This study also proposes a probability S-N curve with the cumulative probability of 50% based on the maximum local energy-based indicator to estimate the expected fatigue life. Ministry of Education (MOE) Nanyang Technological University The Ministry of Education Tier 1 Grants, Singapore (No. 04MNP000279C120, No. 04MNP002126C120) and the Start-Up Grant at Nanyang Technological University, Singapore (No. 04INS000423C120) are acknowledged for their financial support of this research 2021-12-28T07:14:28Z 2021-12-28T07:14:28Z 2021 Journal Article Feng, L., Zhang, L., Liao, X. & Zhang, W. (2021). Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas. Journal of Constructional Steel Research, 176, 106412-. https://dx.doi.org/10.1016/j.jcsr.2020.106412 0143-974X https://hdl.handle.net/10356/154567 10.1016/j.jcsr.2020.106412 2-s2.0-85092659358 176 106412 en 04MNP000279C120 04MNP002126C120 04INS000423C120 Journal of Constructional Steel Research © 2020 Published by Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Probability Analysis
High-Cycle Fatigue
spellingShingle Engineering::Civil engineering
Probability Analysis
High-Cycle Fatigue
Feng, Liuyang
Zhang, Limao
Liao, Xiaowei
Zhang, Wei
Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
description This paper develops a new practical framework of high-cycle fatigue (HCF) probability analysis of local welded plate joints considering the uncertainty in Arctic areas. The framework includes 1) a meta-model of the local energy concentration factor relying on the genetic algorithm and neural network (GA-NN) approach, 2) the identification of uncertainties in the fatigue assessment procedure, and 3) the probability analysis relying on the Monte Carlo simulation with Latin hypercube sampling method. The GA-NN determines the interactive relationship among the geometrical properties for a good estimation of the energy-based indicator concentration factor. The probability analysis considers the uncertainty caused by the meat-model, the local welding geometry, the Young modulus under different temperatures, and the combination of the ice and wave loadings. To determine the uncertainties involved in probability analysis, this study conducts a series of experimental measurements and high-cycle fatigue tests of cruciform welded plate joints. Furthermore, this study discusses the effect of the ice loading, maximum wave stress, and main plate thickness of welded plate joints on the expected fatigue life. The additional ice loading on the welded plate joints can almost cut the expected fatigue life in 33% in comparison with that only under wave loadings, implying the necessity of considering ice loading in Arctic areas. This study also proposes a probability S-N curve with the cumulative probability of 50% based on the maximum local energy-based indicator to estimate the expected fatigue life.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Feng, Liuyang
Zhang, Limao
Liao, Xiaowei
Zhang, Wei
format Article
author Feng, Liuyang
Zhang, Limao
Liao, Xiaowei
Zhang, Wei
author_sort Feng, Liuyang
title Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
title_short Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
title_full Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
title_fullStr Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
title_full_unstemmed Probabilistic fatigue life of welded plate joints under uncertainty in Arctic areas
title_sort probabilistic fatigue life of welded plate joints under uncertainty in arctic areas
publishDate 2021
url https://hdl.handle.net/10356/154567
_version_ 1720447167260262400