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Mechanical Failure and Metal Degradation of Ships and Marine Structures...
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Special Issue "Mechanical Failure and Metal Degradation of Ships and Marine Structures (Volume II)"

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Corrosion and Protection".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 1980

Special Issue Editors

Prof. Dr. Gang Liu

E-Mail Website
Guest Editor
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian 116024, China
Interests: ocean engineering; marine structural safety; fatigue; fracture; creepage
Special Issues, Collections and Topics in MDPI journals
Dr. Yunze Xu

E-Mail Website
Guest Editor
School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian 116024, China
Interests: corrosion; erosion-corrosion; steel; marine structure; pipeline
Special Issues, Collections and Topics in MDPI journals
Dr. Da-Hai Xia

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
Interests: corrosion; electrochemistry and surface science
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jian Zhang

E-Mail Website
Guest Editor
School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Interests: pressure structure; strength; buckling; mechanical failure; metal degradation; corrosion fatigue; underwater metal
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Ships and marine structures are constructed by various metallic materials including high-strength steels, stainless steels, copper alloys, titanium alloys and so on. The damage and failure of these metal components directly threaten the safety of ships, ocean platforms, offshore wind power structures, subsea vehicles, subsea pipelines, risers and cross-sea bridges. Due to the wind, wave and current loads in the ocean, ships and marine structures can suffer from serious mechanical failure, including fatigue, fracture, creepage, erosion and buckling. On the other hand, the metal structures can lessen the risks of electrochemical corrosion in seawater, which could induce the degradation of ships and marine structures. Furthermore, the synergy of the mechanical load and the corrosion (including but not limited to stress corrosion, erosion-corrosion, tribo-corrosion and corrosion fatigue) could lead to the quick failure of the ships and marine structures. As a result, detecting the metal damage and understanding the failure mechanism of metals caused by both mechanical load and electrochemical corrosion in complex marine environments are crucial for early warnings and the protection of ships and marine structures.

Prof. Dr. Gang Liu
Dr. Yunze Xu
Dr. Da-Hai Xia
Prof. Dr. Jian Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ships and marine structures
  • marine metals
  • marine environment
  • mechanical failure
  • corrosion
  • synergy
  • damage monitoring

Published Papers (4 papers)

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Article
Buckling of Bisegment Pressure Hulls Fabricated through Free Bulging
by
Yun Teng
,
Jian Zhang
and
Feng Wang
Metals 2023, 13(3), 576; https://doi.org/10.3390/met13030576 - 13 Mar 2023
Viewed by 262
Abstract
This study explored the buckling performance of bi-segment pressure hulls under external pressure. We fabricated bi-segment pressure hulls from bi-segment cylindrical preforms by using free bulging. The cylindrical preforms had a nominal thickness of 0.95 mm, nominal radius of 51 mm, and nominal [...] Read more.
This study explored the buckling performance of bi-segment pressure hulls under external pressure. We fabricated bi-segment pressure hulls from bi-segment cylindrical preforms by using free bulging. The cylindrical preforms had a nominal thickness of 0.95 mm, nominal radius of 51 mm, and nominal height of 242 mm. Six bi-segment pressure hulls were hydrostatically and externally pressurised into buckling. Experimental results revealed that the maximum buckling load of the bi-segment pressure hulls was increased by 36.75% compared with that of the bi-segment cylinders. In addition, we performed a nonlinear finite element analysis to determine the bulging and buckling modes of the hulls. We noted that the nonlinear analysis results exhibited good agreement with the experimental data. Full article
(This article belongs to the Special Issue Mechanical Failure and Metal Degradation of Ships and Marine Structures (Volume II))
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Article
Uncertainty Analysis of Ultimate Strength for Spherical Shells Subjected to External Pressure
by
Ming Zhan
,
Chao Ding
,
Jian Zhang
,
Lingtong Zheng
and
Lihui Wang
Metals 2023, 13(3), 529; https://doi.org/10.3390/met13030529 - 06 Mar 2023
Viewed by 274
Abstract
To evaluate the stochastic characteristics of ultimate strength for spherical shells subjected to external pressure, uncertainty analysis is conducted in this study. Experimental measurements and result analysis of dimensions, as well as ultimate strength, are performed. The basic theories of the surrogate model [...] Read more.
To evaluate the stochastic characteristics of ultimate strength for spherical shells subjected to external pressure, uncertainty analysis is conducted in this study. Experimental measurements and result analysis of dimensions, as well as ultimate strength, are performed. The basic theories of the surrogate model and probability-box method for ultimate strength are introduced briefly. Uncertainty analysis of ultimate strength is completed utilizing double-nested random sampling based on the established Gaussian process model with high precision, and the results are compared with the experimental findings. The results show that the experimental empirical cumulative distribution function is contained in the probability-box obtained while considering the influence of welding, and the absolute errors of the mean value, as well as those of the standard deviation, are much smaller. The study verified that the influence of welding cannot be ignored, and the prediction of ultimate strength, considering uncertainties, can eliminate the occasionalities of simulations and experimental tests. Full article
(This article belongs to the Special Issue Mechanical Failure and Metal Degradation of Ships and Marine Structures (Volume II))
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Article
Numerical and Experimental Buckling and Post-Buckling Analyses of Sphere-Segmented Toroidal Shell Subject to External Pressure
by
Chenyang Di
,
Jian Zhang
,
Fang Wang
and
Yu Zhang
Metals 2023, 13(1), 64; https://doi.org/10.3390/met13010064 - 26 Dec 2022
Viewed by 543
Abstract
This study determined the buckling characteristics of sphere-segmented toroidal shells subjected to external pressure. The proposed toroidal vessel comprises six spheres and six rings. Two laboratory models with the same nominal dimensions were manufactured, measured, tested, and evaluated. To investigate whether sphere-segmented toroidal [...] Read more.
This study determined the buckling characteristics of sphere-segmented toroidal shells subjected to external pressure. The proposed toroidal vessel comprises six spheres and six rings. Two laboratory models with the same nominal dimensions were manufactured, measured, tested, and evaluated. To investigate whether sphere-segmented toroidal shells are imperfection-sensitive structures with closely spaced eigenvalues, the subspace algorithm was applied to evaluate the first 50 eigenmodes, and the modified Riks algorithm was used to obtain post-buckling characteristics. The results indicated that the deviation between the results of the experimental and numerical analyses was within a reasonable range. The proposed sphere-segmented toroidal shells were highly imperfection-sensitive structures with closely spaced eigenvalues. Subsequently, imperfection sensitivity analysis confirmed this conclusion. In numerical analyses, the first eigenmode could be considered as the worst eigenmode of sphere-segmented toroidal shells. The trend of the equilibrium path of sphere-segmented toroidal shells was consistent with spherical shells, revealing instability. In addition, ellipticity and completeness exerted a negligible effect on the buckling load of sphere-segmented toroidal shells. Full article
(This article belongs to the Special Issue Mechanical Failure and Metal Degradation of Ships and Marine Structures (Volume II))
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Article
Mutual Interactions of Lamb Waves in Nonlinear Elastic Plates
by
Shuyi Ma
,
Guixian Zhang
,
Hongfeng Hou
and
Lidong Wang
Metals 2022, 12(12), 2175; https://doi.org/10.3390/met12122175 - 16 Dec 2022
Viewed by 480
Abstract
The mutual interactions of Lamb waves in nonlinear elastic plates are studied in this article. Many researchers have investigated the interactions of Lamb wave modes at nonlinear higher harmonics. However, little is known about nonlinearity-driven Lamb modulations from two primary modes with different [...] Read more.
The mutual interactions of Lamb waves in nonlinear elastic plates are studied in this article. Many researchers have investigated the interactions of Lamb wave modes at nonlinear higher harmonics. However, little is known about nonlinearity-driven Lamb modulations from two primary modes with different frequencies. In this study, the existence of symmetric or antisymmetric mode due to Lamb wave mutual interactions is firstly theoretically formulated. Then, an approach is proposed to evaluate the intensity of phase velocity matching for selecting primary modes. Finally, the characteristics of the modulated wave generation are investigated and demonstrated. The generation of modulated waves in an aluminum plate and fatigue crack can be detected by mutual interactions of Lamb waves. The main contribution of this work is the proposed mutual interaction theory of Lamb waves in fatigue plates, which can guide fatigue detection in the metal plate. Full article
(This article belongs to the Special Issue Mechanical Failure and Metal Degradation of Ships and Marine Structures (Volume II))
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