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Engineering Materials and Structural Integrity
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Engineering Materials and Structural Integrity

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Mechanics of Materials".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 2187

Special Issue Editor

Prof. Dr. Bing Yang

E-Mail Website
Guest Editor
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, 610031, China
Interests: fatigue and fracture of materials; fatigue cracking mechanism of additively manufactured parts

Special Issue Information

Dear Colleagues,

Engineering materials play an important role in both industry and construction, with lots of applications in fields like vehicles, aerospace, transport, marine, defense, civil engineering, etc. Meanwhile, engineering materials, components, and structures are usually subjected to variable loading and environmental conditions, such as static/dynamic loading, cyclic fatigue, overloading, vibrations, collision, creep, stress corrosion, crack propagation, etc. Research into the reliability and structural integrity of engineering materials is now receiving significant scholarly attention.

This Special Issue aims to demonstrate the latest reliability evaluation of materials’ properties and mechanical components, as well as engineering materials’ fabrication and testing technologies. We welcome contributions regarding engineering materials, structures, and mechanical components.

Potential topics include, but are not limited to, the following areas:

  • Engineering materials and structures, such as metals, steels, alloys, and composites;
  • Hybrid structures, like steel rails/bridges/axles, welding parts, connections, etc.;
  • Structural integrity and lifetime reliability, including deformation, wear, damage, fatigue, fracture, failure, shock-absorbing/resistance, etc.;
  • The fabrication, testing, and simulation technologies used in combination with engineering materials, including microstructural evolutions, stress–strain analysis, structural health monitoring (SHM), crack damage detection, non-destructive examination (NDE), the finite element method (FEM), etc.

Prof. Dr. Bing Yang
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. Materials is an international peer-reviewed open access semimonthly 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

  • engineering materials
  • mechanical components
  • structural integrity and lifetime reliability
  • wear, cracks, fatigue, fracture, and failure
  • mechanical behaviors
  • stress–strain analysis
  • microstructural evolutions
  • fabrication and testing technologies
  • numerical simulation
  • structural health monitoring

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

12 pages, 5896 KiB  
Article
Comparison of the Modified CTOD Measurement Method with the Double Clip Gauge Method in a Compact Tension Specimen
by Jeong Yeol Park, Myung Hyun Kim and Chang Wook Ji
Materials 2025, 18(2), 310; https://doi.org/10.3390/ma18020310 - 11 Jan 2025
Viewed by 750
Abstract
For allowable defect analyses, the fracture toughness of materials needs to be accurately predicted. In this regard, a lower fluctuation of fracture toughness can lead to reduction in safety and economic risks. Crack tip opening displacement (CTOD), which is the representative parameter for [...] Read more.
For allowable defect analyses, the fracture toughness of materials needs to be accurately predicted. In this regard, a lower fluctuation of fracture toughness can lead to reduction in safety and economic risks. Crack tip opening displacement (CTOD), which is the representative parameter for fracture toughness, can be measured by various methods, such as the δ5, the J-conversion method, the single clip gauge method, and the double clip gauge method. When calculating CTOD from test results, the principle of similar triangles, which adopts the plastic hinge model, is influenced by the rotation factor, rp. Therefore, in order to reduce the fluctuation of CTOD, the exact value of rp must be defined. This study investigates various methods to predict fracture toughness in metallic materials, and assess the pros and cons of each method. Moreover, the equation of rp is modified by using a double clip gauge in compact tension (CT) to reduce the fluctuation of CTOD. The rp value is derived from 0.55 to 0.68, using the double clip gauge method. Finite element analysis is used to derive the rp values, which range from 0.50 to 0.66, in order to verify the validity of the derived rp values. This ensures the validity of the rp value derived from the experiment. In addition, the fluctuation of CTOD, based on the modified equation of rp, is lower than that using the single clip gauge method, according to BS 7448. Full article
(This article belongs to the Special Issue Engineering Materials and Structural Integrity)
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17 pages, 26738 KiB  
Article
Fatigue Crack Growth Performance of Q370qENH Weathering Bridge Steel and Butt Welds
by Yujie Yu, Xiang Zhang, Chunjian Hu, Liangkun Liu and Haibo Wang
Materials 2024, 17(23), 6015; https://doi.org/10.3390/ma17236015 - 9 Dec 2024
Cited by 1 | Viewed by 821
Abstract
Weathering steel possesses good atmospheric corrosion resistance and is increasingly applied in highway and railway bridges. The fatigue performance of the weld joint is an important issue in bridge engineering. This study experimentally investigates the microstructural properties and fracture crack growth behaviors of [...] Read more.
Weathering steel possesses good atmospheric corrosion resistance and is increasingly applied in highway and railway bridges. The fatigue performance of the weld joint is an important issue in bridge engineering. This study experimentally investigates the microstructural properties and fracture crack growth behaviors of a Q370qENH bridge weathering steel weld joint. The FCG parameters of the base steel, butt weld, and HAZs, considering the effect of different plate thicknesses and stress ratios, are analyzed. Microstructural features, microhardness, and fatigue fracture surfaces are carefully inspected. The FCG rates of different weld regions in the stable crack growth stage are obtained using integral formulas based on the Paris and Walker law. The test results indicate that the heating and cooling process during the welding of Q370qENH steel creates improved microstructures with refined grain sizes and fewer impurities, thus leading to improved FCG performances in the HAZ and weld regions. The crack growth rate of Q370qENH weld regions increases with the stress ratio, and the influencing extent increasingly ranks as the base steel, HAZ, and the weld. The thick plate has a slightly slower fatigue crack growth rate for the Q370qENH weld joints. The Q370qENH base steel presents the highest fatigue crack growth rate, followed by the heat-treated and HAZ cases, while the weld area exhibits the lowest FCG rate. The Paris law coefficients of different regions of Q370qENH welds are presented. The collected data serve as a valuable reference for future analyses of fatigue crack propagation problems of Q370qENH steel bridge joints. Full article
(This article belongs to the Special Issue Engineering Materials and Structural Integrity)
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