Fatigue and Fracture of Metallic Engineering Materials and Structures

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 3497

Special Issue Editor


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Guest Editor
Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, 03043 Cassino, Italy
Interests: modeling materials behavior under extreme conditions (high strain rates, elevated temperature, pressure, large strain); fracture mechanics and damage mechanics; creep; experimental characterization; finite element simulation and computational mechanics; characterization and damage assessment of additively manufactured materials (metals and alloys)
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Special Issue Information

Dear Colleagues,

This Special Issue aims to collate original research articles and reviews that deepen our understanding of fatigue and fracture mechanisms in engineering materials and structures. In the evolving field of material science and engineering, a comprehensive understanding of fatigue and fracture behaviors under varied conditions is crucial for advancing technology and infrastructure. Submissions that delve into specific failure modes, including but not limited to impact, creep, brittle fractures, ductile failure, spall, and the effect of the stress state, are of particular interest. These investigations will provide essential insights that can contribute to the broader knowledge base of material behavior under complex loading conditions.

Prof. Dr. Nicola Bonora
Guest Editor

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Keywords

  • fracture fatigue
  • creep
  • impact
  • spall
  • temperature

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Published Papers (2 papers)

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Research

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16 pages, 5677 KiB  
Article
Fatigue Life Estimation Model of Repaired Components with the Expanded Stop-Hole Technique
by Wilmer Velilla-Díaz, Roger Pinzón, Renny Guillén-Rujano, José David Pérez-Ruiz, Luis Norberto López de Lacalle, Argemiro Palencia, Heriberto Maury and Habib R. Zambrano
Metals 2024, 14(2), 182; https://doi.org/10.3390/met14020182 - 1 Feb 2024
Viewed by 1562
Abstract
Fatigue crack growth tests are conducted to assess the efficacy of the stop-hole crack repair method. This straightforward and widely adopted technique involves drilling a hole at the crack tip and subsequently enlarging it using a pin inserted into the hole. A fracture [...] Read more.
Fatigue crack growth tests are conducted to assess the efficacy of the stop-hole crack repair method. This straightforward and widely adopted technique involves drilling a hole at the crack tip and subsequently enlarging it using a pin inserted into the hole. A fracture mechanics-based model is proposed to estimate the extension of fatigue life achieved through the implementation of the stop-hole technique. The model’s predictions are validated using data obtained from fatigue crack growth tests conducted on both unrepaired and repaired M(T) specimens, following the guidelines outlined in the ASTM E647 standard. The error of the fracture mechanics-based model was 1.4% in comparison with the fatigue tests. Full article
(This article belongs to the Special Issue Fatigue and Fracture of Metallic Engineering Materials and Structures)
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Review

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30 pages, 18375 KiB  
Review
Examining the Effects on a Fatigue Life of Preloaded Bolts in Flange Joints: An Overview
by Ivan Okorn, Marko Nagode, Jernej Klemenc and Simon Oman
Metals 2024, 14(8), 883; https://doi.org/10.3390/met14080883 - 31 Jul 2024
Viewed by 1605
Abstract
The amplitude of a bolt load in dynamically loaded bolted flange joints depends on several factors: the resilience of the bolt and the clamping parts, the magnitude of the working load, the point of action of the working load, the way the working [...] Read more.
The amplitude of a bolt load in dynamically loaded bolted flange joints depends on several factors: the resilience of the bolt and the clamping parts, the magnitude of the working load, the point of action of the working load, the way the working load is transferred from the structure to the bolt, the preload, and the geometrical imperfections of the contact surfaces of the joint. These factors are analysed in many papers, and they are covered in the VDI 2230 guideline and in standards. Fatigue curves (S-N curves) of bolts are determined by tests in which an ideal axial load is usually applied to the bolts. The effects of the bolt strength class, the thread manufacturing process, the surface protection, and the cross-section size on the fatigue strength of bolts are precisely defined. The main problem in the evaluation of bolted joints is the calculation of the actual stress, which is compared with the fatigue curves. Despite extensive research, fatigue-related bolt failures still occur in practise. This article provides a systematic overview of the influences that affect the fatigue of bolts. The conclusions are based on the research results of many authors and on our own analytical, numerical, and experimental investigations. The effects are illustrated using two practical examples of flange bolting. The assessment of fatigue according to Eurocode 3 and the VDI 2230 guideline is discussed in more detail. Full article
(This article belongs to the Special Issue Fatigue and Fracture of Metallic Engineering Materials and Structures)
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