Fatigue and Fracture Mechanics of Marine Structures 2nd Edition

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (5 October 2023) | Viewed by 1990

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Guest Editor
School of Mechanical Engineering, National Technical University of Athens, 15780 Zografou, Greece
Interests: molecular dynamics; finite element method; machining processes; non-conventional machining processes; material testing; hard-to-cut materials; multiscale modeling of machining; abrasive processes
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Special Issue Information

Dear Colleagues,

Marine structures of various types are subjected to different types of loads due to waves, vibrations or uneven distribution of weight, which can lead to high levels of cyclic loading. Thus, fatigue and fracture should be taken into consideration as some of the basic criteria when designing marine structures in order to ensure the appropriate safety level. Structural integrity of marine structures should be ensured under various environments, and given that it can be affected by different types of loads, the study of fatigue and fracture in these structures should also involve simulations using multi-physics or even multi-scale approaches in order to predict the strength of marine structures, crack growth or even their potential failure.

This Special Issue focuses on the study of fatigue and fracture mechanics of marine structures by using different novel approaches, including both analytical and numerical models. Relevant case studies will be considered, as well as studies exploring the effects of various parameters on the fatigue and fracture of marine structures and their components under different environments. Furthermore, we will also allow advanced predictive models, which can be incorporated in general design and optimization frameworks using not only FE or other relevant methods but machine learning methods as well, to be developed and presented. Finally, additive manufacturing methods for marine structures may also be evaluated here using different methods. Both original and review papers are welcome.

Dr. Nikolaos Karkalos
Guest Editor

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. Journal of Marine Science and Engineering 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 2600 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

  • mechanics of fatigue and fracture of marine structures
  • mechanical behavior of welded joints created using various techniques
  • novel techniques for improving the strength of welds in marine structures
  • assessment of fatigue limit state of marine structures
  • advanced models for describing the fracture of materials used in marine structures
  • assessment of weld quality for marine structures
  • optimization frameworks for efficient marine structures design
  • AI methods for predicting fatigue and fracture of marine structures
  • design and evaluation of additively manufactured parts for marine structures with emphasis on fatigue behavior
  • meshless methods for fracture propagation simulation in marine structures
  • multiscale methods for fracture propagation simulation in marine structures

Published Papers (2 papers)

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Research

16 pages, 5087 KiB  
Article
Fatigue Life Assessment in the Typical Structure of Large Container Vessels Based on Fracture Mechanics
by Jinfeng Liu, Guoqing Feng, Jiaying Wang, Huilong Ren, Wei Song and Panpan Lin
J. Mar. Sci. Eng. 2023, 11(11), 2075; https://doi.org/10.3390/jmse11112075 - 30 Oct 2023
Cited by 1 | Viewed by 875
Abstract
Welding defects are known to cause crack propagation and reduce structural fatigue performance. Based on the Paris theory of fracture mechanics, research is conducted on evaluation methods for analyzing fatigue crack propagation by adopting random loads with long-term distribution that follows the Weibull [...] Read more.
Welding defects are known to cause crack propagation and reduce structural fatigue performance. Based on the Paris theory of fracture mechanics, research is conducted on evaluation methods for analyzing fatigue crack propagation by adopting random loads with long-term distribution that follows the Weibull distribution for the stress ranges of fatigue loads. This approach is combined with the corrective stress intensity factor (SIF) equation and the method for calculating the reference stress and failure criterion. A large container ship is selected for a simulation, and fatigue crack propagation analysis is conducted on typical critical locations. A detailed comparison of the forecasted fatigue life is carried out between fracture mechanics theory and the S-N curve. The results indicate that the fatigue life values obtained using the two methods are of the same magnitude. In general, for the welded structure, the fatigue life value obtained via the fracture mechanics method is shorter than that obtained via the S-N curve method, while, for the free edge of the structure and the unwelded structure, the predicted fatigue life value is closer than that predicted via the S-N curve method. Moreover, the influence of initial crack defects on the fatigue life is investigated, and the results show that the depth of the initial crack will greatly affect the fatigue life of the target ship in typical locations, but the influence of the shape ratio on the fatigue life is limited. Therefore, in the actual ship construction process, controlling the initial crack depth of components is effective for limiting crack propagation and improving fatigue life. The above conclusions and suggestions can serve as a reference for the structural design and fatigue life evaluation of large container ships. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics of Marine Structures 2nd Edition)
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22 pages, 12930 KiB  
Article
Research on Dynamic Response of Pipeline under the Reeling Process and Laying Process
by Ming Ju, Yang Jiang, Feihong Yun, Hongwei Chai, Xi Chen, Mingxuan Zhang and Liquan Wang
J. Mar. Sci. Eng. 2023, 11(9), 1783; https://doi.org/10.3390/jmse11091783 - 13 Sep 2023
Viewed by 875
Abstract
During the process of laying submarine pipelines using the R-lay (short for reel-lay) method, the interaction between the pipeline and the laying equipment undergoes continual fluctuations, leading to bending in the pipeline induced by the stochastic dynamics of various external loads. Considering the [...] Read more.
During the process of laying submarine pipelines using the R-lay (short for reel-lay) method, the interaction between the pipeline and the laying equipment undergoes continual fluctuations, leading to bending in the pipeline induced by the stochastic dynamics of various external loads. Considering the challenge in forecasting the dynamic behavior of pipeline bending moments and ovality throughout this procedure, we constructed a finite element-based shell element model for a 6-inch pipeline. In this paper, a multi-step simulation approach was used to replicate the pipeline laying process, and the dynamic response in pipeline bending moments and ovality during the winding, unwinding, and straightening processes was analyzed. Additionally, the effects of the pipeline’s diameter–thickness ratio and material properties on the dynamic response process were also studied. The results show that the dynamic response in bending moments and ovality is closely related to the curvature of the pipeline; a brief peak will appear at the critical point where the pipeline deforms, and the peak is related to the different bending stages of the pipeline, with the winding stage having a greater impact on the peak than the unwinding stage. During the unwinding process, a reverse bending moment will occur. The dynamic response of pipeline bending moments and ovality is influenced to some extent by the pipeline’s diameter–thickness ratio and material properties, with the diameter–thickness ratio demonstrating a more conspicuous impact. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics of Marine Structures 2nd Edition)
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