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Metals
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Studies on Fatigue Behavior of Engineering Material and Structures
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Studies on Fatigue Behavior of Engineering Material and Structures

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 7433

Special Issue Editors

Dr. Fang Wang

E-Mail Website
Guest Editor
College of Engineering Science and Technology, Shanghai Ocean University, No.999, Hucheng Huan Road, Shanghai 201306, China
Interests: submersible structures; fatigue of ships and marine structures; ultimate strength of ships and marine structures
Special Issues, Collections and Topics in MDPI journals
Dr. Yu Wu

E-Mail Website
Guest Editor
College of engineering Science and Technology, Shanghai Ocean University, No.999, Hucheng Huan Road, Shanghai 201306, China
Interests: crack damage; fatigue

Special Issue Information

Dear Colleagues,

Structural fatigue is a failure mode of particular concern in the engineering field. Fatigue behavior is affected by many factors, such as material, structure, environment, load, and so on. With the continuous application of new materials in engineering and the improvement of requirements for structural safety and reliability, fatigue theory, simulation/testing methods, and their application in engineering structure design are currently under development. The goal of this Special Issue is to give an exhaustive overview of new trends in the particular field by inviting researchers and engineers to contribute a series of articles, including reviews and original research. Theoretical, experimental, and computational studies on (but not limited to) the following topics are encouraged for this Special Issue:

  • Fatigue behavior of engineering materials;
  • Effect of microstructure and defects on fatigue behavior;
  • Fatigue failure mechanism;
  • New theories of fatigue models;
  • Crack initiation, growth, and final fracture;
  • Fatigue testing of engineering structures;
  • Fatigue resistance related to design and manufacturing;
  • Modeling of fatigue and fracture process;
  • Fatigue design and guidelines of engineering structures.

Prof. Dr. Fang Wang
Dr. Yu Wu
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 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.

Published Papers (5 papers)

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Research

13 pages, 10691 KiB  
Article
Creep of High-Strength Steel Coated with Plasma Sprayed Self-Fluxing Alloy
by Denison A. Moraes, Gisele F. C. Almeida, Antonio A. Couto, Marcos Massi, Felipe R. Caliari and Carlos R. C. Lima
Metals 2023, 13(4), 763; https://0-doi-org.brum.beds.ac.uk/10.3390/met13040763 - 14 Apr 2023
Cited by 2 | Viewed by 1150
Abstract
This article compares the creep testing behavior of AISI 4340 high-strength steel in the as-received and coated conditions. The coating material used was a NiCrBSi self-fluxing alloy. The microstructural characterization was carried out using optical and scanning electron microscopy. The creep tests were [...] Read more.
This article compares the creep testing behavior of AISI 4340 high-strength steel in the as-received and coated conditions. The coating material used was a NiCrBSi self-fluxing alloy. The microstructural characterization was carried out using optical and scanning electron microscopy. The creep tests were conducted at a temperature of 550 °C and with loads of 200, 250, and 300 MPa. The microstructure analysis of the deposited layer revealed some inclusions, very low porosity, and good adhesion to the substrate. The results of the creep tests indicated a decrease in the time to rupture under loads of 250 and 300 MPa for the coated steel. At a load of 200 MPa, the coated steel presented longer times to rupture and higher yield strength, demonstrating an improvement over the uncoated steel under these test condition. The fracture surface inspection showed a failure by a ductile fracture in both samples, with and without coating. Full article
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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13 pages, 5382 KiB  
Article
Three-Dimension Crack Propagation Behavior of Conical-Cylindrical Shell
by Yongmei Zhu, Jiahao Yang and Hongzhang Pan
Metals 2023, 13(4), 698; https://0-doi-org.brum.beds.ac.uk/10.3390/met13040698 - 3 Apr 2023
Cited by 1 | Viewed by 1326
Abstract
The conical-cylindrical shell is prone to stress concentration in the convex cone position under the action of deep-sea pressures. This results in unidirectional or bidirectional positive tensile stresses on the surfaces of the shell. The conical-cylindrical shell is a large, welded structure. Welding [...] Read more.
The conical-cylindrical shell is prone to stress concentration in the convex cone position under the action of deep-sea pressures. This results in unidirectional or bidirectional positive tensile stresses on the surfaces of the shell. The conical-cylindrical shell is a large, welded structure. Welding residual stress was generated at the cone-column joint position, resulting in high-stress concentration at this location. Under both the residual stress of welding and seawater pressure, cracks easily form and propagate on the shell weld toe, leading to fatigue damage and even structural failure. In this paper, based on the seawater’s alternating load and the residual stress of welding, the three-dimensional crack propagation process was studied for the submarine conical-cylindrical shell. The effects of crack depth and shape ratio on crack propagation trend and fatigue life were analyzed. The results can provide references for predicting the crack propagation trend, assessing the remaining life and evaluating the structural safety of the submarine conical-cylindrical shell. Full article
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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12 pages, 5588 KiB  
Article
Fatigue Limit Improvement and Rendering Surface Defects Harmless by Shot Peening for Carburized Steel
by Toshiya Tsuji, Masashi Fujino and Koji Takahashi
Metals 2023, 13(1), 42; https://0-doi-org.brum.beds.ac.uk/10.3390/met13010042 - 23 Dec 2022
Cited by 1 | Viewed by 1491
Abstract
Remanufacturing has become popular as a system for reducing CO2 emissions caused by the life cycle of products. Therefore, producing more components via remanufacturing is important. Shot peening can be used to render surface defects harmless owing to the compressive residual stress [...] Read more.
Remanufacturing has become popular as a system for reducing CO2 emissions caused by the life cycle of products. Therefore, producing more components via remanufacturing is important. Shot peening can be used to render surface defects harmless owing to the compressive residual stress effects. This study investigated the effects of shot peening as a means of remanufacturing gears. In this study, carburized steel specimens containing artificial defects were used to investigate the effects of shot peening on the fatigue strength; the defect size was rendered harmless by shot peening. Shot peening was conducted after inducing semicircular slits with depths of a = 0.15, 0.20, and 0.30 mm. Subsequently, plane bending fatigue tests were carried out. A maximum compressive residual stress of 1400 MPa was induced after shot peening. The fatigue limit of the smooth specimen increased by approximately 31% after shot peening. A semicircular slit of at least 0.20 mm deep could be rendered harmless by shot peening (SP). The defect size reduced by SP was evaluated on the basis of fracture mechanics. The estimated results are consistent with the experimental results. On the basis of the results, the feasibility of shot peening as a remanufacturing method for gears is discussed. Full article
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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16 pages, 7709 KiB  
Article
Residual Stress Properties of the Welded Thick Underwater Spherical Pressure Hull Based on Finite Element Analysis
by Fang Wang, Pinpin Kong, Zhongzhou Sun, Jinfei Zhang, Fengluo Chen, Yu Wu and Yongmei Wang
Metals 2022, 12(11), 1958; https://0-doi-org.brum.beds.ac.uk/10.3390/met12111958 - 16 Nov 2022
Cited by 2 | Viewed by 1469
Abstract
Residual stress inevitably occurs at the weld in the process of manufacturing thick pressure hulls for manned submersibles, which affects the bearing capacity of the hull. In this study, an electron-beam-welded 32 mm-thick Ti-6Al-4V plate specimen is first tested, then the measured data [...] Read more.
Residual stress inevitably occurs at the weld in the process of manufacturing thick pressure hulls for manned submersibles, which affects the bearing capacity of the hull. In this study, an electron-beam-welded 32 mm-thick Ti-6Al-4V plate specimen is first tested, then the measured data of residual stress distribution is applied to validate the accuracy of the simulation method. Accordingly, three-dimensional numerical analysis on the equator welding by electron beam method of a 32 mm-thick Ti-6Al-4V spherical pressure hull is conducted to obtain the variation tendency of residual stress during the welding process. The results indicate that both compressive and tensile stresses exist along the weld path on the outer surface of the hull comparing to total tensile stresses on the inner surface. The maximum tensile stress that occurs on the inner surface approximates to 850 MPa, which is almost equivalent to the yield stress of the material. Based on the acceptance criterion that the peak value of residual stress due to weld technique is restricted to be less than 40% of the material yield strength in room temperature, post-weld heat treatment must be performed. Simulation on post-weld heat treatment for optimizing process parameters can be done by taking the results of welding simulation in the present study as input. Full article
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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19 pages, 7974 KiB  
Article
Effect of Constraint and Crack Contact Closure on Fatigue Crack Mechanical Behavior of Specimen under Negative Loading Ratio by Finite Element Method
by Xinting Miao, Haisheng Hong, Xinyi Hong, Jian Peng and Fengfeng Bie
Metals 2022, 12(11), 1858; https://0-doi-org.brum.beds.ac.uk/10.3390/met12111858 - 31 Oct 2022
Cited by 3 | Viewed by 1224
Abstract
Mechanical behaviors at fatigue crack tips of cracked specimens under negative loading ratios are studied in detail by the finite element method in this paper. Three factors induced by specimen type and loading type on fatigue crack field are discussed, including constraint, compressive [...] Read more.
Mechanical behaviors at fatigue crack tips of cracked specimens under negative loading ratios are studied in detail by the finite element method in this paper. Three factors induced by specimen type and loading type on fatigue crack field are discussed, including constraint, compressive loading effect (CL effect) and crack contact closure. For mode I crack under negative loading ratios, the effects of the CL effect and crack contact closure on plastic strain accumulations are dominant, with the constraint effect being minor. The constraint effect has effects on the monotonous plastic zone, while the CL effect and contact closure both have effects on the reversed plastic zone (RPZ) and residual tensile plastic zone (RTPZ). That is, the higher the constraint, the smaller the size of the monotonous plastic zone; the greater the CL effect, or the smaller the contact degree, the larger the size of RPZ and RTPZ. For mode II crack, there is only CL effect on the crack tip field without the effect of constraint and contact closure, so plastic strain accumulation at the mode II crack tip is much greater than that at the mode I crack tip when they are under the same loading level. Full article
(This article belongs to the Special Issue Studies on Fatigue Behavior of Engineering Material and Structures)
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