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Fatigue and Fracture Mechanics: Applications and Trends

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 10227

Special Issue Editors


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Guest Editor
Department of Civil Engineering, University of Porto, 4200-465 Porto, Portugal
Interests: numerical modeling of engineering structures and structural components (offshore applications, steel bridges, pressure vessels, pipelines, wind turbine towers, etc.); mathematical problems in fatigue and fracture; mechanics of solids and structures; metals materials and structures; numerical fracture mechanics and crack growth; local approaches; finite element methods in structural mechanics applications; computer-aided structural integrity
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Guest Editor
Department of Chemical Engineering, Materials and Environment, Sapienza University of Rome, 00184 Rome, Italy
Interests: fatigue and fracture behavior of materials; mechanical characterization; structural integrity of conventional and innovative materials
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Guest Editor
Department of Industrial Automation, Ternopil Ivan Pul’uj National Technical University, Ternopil, Ukraine
Interests: mechanical properties; mechanical behavior of materials; material characterization; mechanical testing; finite element analysis
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Guest Editor
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
Interests: fracture; ultra-high-cycle fatigue; additive manufacturing alloys
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue (SI) covers a wide range of modern achievements in the study of the behavior of solids with cracks—from studies of cyclic durability and the nucleation and growth of a fatigue crack to solving a number of complex problems of fracture mechanics. In this SI, limiting and prelimiting equilibrium states of materials and structures under single, multiple, thermal, and dynamic loading in elastic, viscoelastic, and elastoplastic bodies with cracks will be considered. We also invite you to submit articles on new criteria for crack resistance of materials for structural integrity.

Considerable attention will be paid to the application of numerical methods for the analysis of stresses and strains in solids and constructions with notches and cracks. We will also be glad to see the results of studies on predicting the operability of structures according to the test data of laboratory samples, taking into account the scale factor based on similarity criteria for local fractures.

Considerable attention will be paid to research methods and the basic laws of fatigue and cyclic crack resistance of metals and alloys in deterministic and probabilistic settings. Also relevant for consideration are the characteristics of high cyclic fatigue for materials manufactured by new technological methods. We invite articles devoted to the basic laws of cyclic plasticity and fatigue of metals and alloys (especially those produced by additive manufacturing).

We also invite papers devoted to the deformation and energy criteria of fatigue fracture of metals estimation by FEM and experimental verification. Particular attention will be paid to the development of methods for accelerated determination of endurance limits based on deformation and energy criteria. The problem of predicting the development of cracks and probabilistic fatigue modeling will also be discussed.

Dr. José A.F.O. Correia
Prof. Dr. Filippo Berto
Prof. Dr. Pavlo Maruschak
Dr. Guian Qian
Dr. Abílio M.P. De Jesus
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. Applied Sciences 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 2400 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

  • fatigue
  • fracture mechanics
  • fatigue crack growth
  • structural integrity
  • computer-aided fracture mechanics
  • computer-aided structural integrity
  • failure mechanisms
  • cyclic plasticity
  • applications and design codes
  • probabilistic fatigue modeling

Published Papers (4 papers)

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Research

19 pages, 6740 KiB  
Article
An Anisotropic Damage Model of Quasi-Brittle Materials and Its Application to the Fracture Process Simulation
by Haijing Wang, Bo Zhou, Shifeng Xue, Xuejing Deng, Peng Jia and Xiuxing Zhu
Appl. Sci. 2022, 12(23), 12073; https://doi.org/10.3390/app122312073 - 25 Nov 2022
Cited by 2 | Viewed by 1523
Abstract
Accurate predictions of the failure behaviors of quasi-brittle materials are of practical significance to underground engineering. In this work, a novel anisotropic damage model is proposed based on continuous damage mechanics. The anisotropic damage model includes a two-parameter parabolic-type failure criterion, a stiffness [...] Read more.
Accurate predictions of the failure behaviors of quasi-brittle materials are of practical significance to underground engineering. In this work, a novel anisotropic damage model is proposed based on continuous damage mechanics. The anisotropic damage model includes a two-parameter parabolic-type failure criterion, a stiffness degradation model that considers anisotropic damage, and damage evolution equations for tension and shear, respectively. The advantage of this model is that the degradation of elastic stiffness only occurs in the direction parallel to the failure surface for shear damage, avoiding the interpenetration of crack surfaces. In addition, the shear damage evolution equation is established based on the equivalent shear strain on the failure face. A cyclic iterative method based on the proposed anisotropic damage model was developed to numerically simulate the fracture process of quasi-brittle materials. The developed model and method are important because the ready-made finite element software is difficult to simulate the anisotropic damage of quasi-brittle materials. The proposed anisotropic damage model was tested against a conventional damage model and validated against two benchmark experiments: uniaxial and biaxial compression tests and Brazilian splitting tests. The results demonstrate that the proposed anisotropic damage model simulates the mesoscale damage mode, macroscale fracture modes, and strength characteristics more effectively and accurately than conventional damage models. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics: Applications and Trends)
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16 pages, 6219 KiB  
Article
Experimental Investigation of the Fatigue Life of a Bridge Crane Girder Using S-N Method
by Miroslav Pástor, Pavol Lengvarský, Martin Hagara and Jozef Kuľka
Appl. Sci. 2022, 12(20), 10319; https://doi.org/10.3390/app122010319 - 13 Oct 2022
Cited by 2 | Viewed by 1879
Abstract
Experimental measurement methods used in operational mode provide valuable information about the behavior of mechanical parts of equipment that cannot be determined in advance by analytical calculations or numerical modeling. The strain gauge method, which is often used to investigate the stresses in [...] Read more.
Experimental measurement methods used in operational mode provide valuable information about the behavior of mechanical parts of equipment that cannot be determined in advance by analytical calculations or numerical modeling. The strain gauge method, which is often used to investigate the stresses in the load-bearing members of steel structures under operational conditions, was used. The advantage is the fast and accurate acquisition of stress values at critical locations selected based on analytical computations or numerical modeling. In the present paper, the residual operating life of two main girders of a bridge crane was assessed by an analytical-experimental approach. The input parameters for the assessment were obtained from the evaluated stress time records and using the Rainflow Counting method. Experimental measurements identified an almost 50% decrease in the residual life of one of the girders. It was caused by non-compliance with the technological procedures for the regular replacement of the rails, where the rail was welded to the top flange on one of the girders. Considering realistic operating conditions, predicting the effect of welded rail on fatigue damage accumulation, performed by other than experimental procedures, is almost impossible for such complex structures. This paper not only documents the importance of experimental measurements but also highlights the significance of selecting measurement locations with consideration of the current technical state of the structure. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics: Applications and Trends)
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15 pages, 38972 KiB  
Article
Fracture Toughness Determination on an SCB Specimen by Meshless Methods
by Farid Mehri Sofiani, Behzad V. Farahani and Jorge Belinha
Appl. Sci. 2022, 12(5), 2633; https://doi.org/10.3390/app12052633 - 3 Mar 2022
Cited by 5 | Viewed by 2018
Abstract
This work investigates fracture characteristics of a marble semi-circular bend (SCB) specimen with a pre-defined crack under a compressive loading condition. It aims at evaluating how the fracture toughness can be affected by the crack and span length variation. Numerically, the model is [...] Read more.
This work investigates fracture characteristics of a marble semi-circular bend (SCB) specimen with a pre-defined crack under a compressive loading condition. It aims at evaluating how the fracture toughness can be affected by the crack and span length variation. Numerically, the model is solved using meshless methods, extended to the linear elastic fracture mechanics (LEFM), resorting to radial point interpolation method (RPIM) and its natural neighbor versions (NNRPIMv1 and NNRPIMv2). Alternatively, to validate the meshless method results, the problem is resolved following the finite element method (FEM) model based on the standard 2D constant strain triangle elements. As a result, fracture toughness and the critical strain energy release rate are characterized following the testing method on the cracked straight through semi-circular bend specimen (CSTSCB). A comparison is drawn amongst the theoretical, meshless methods and FEM results to evaluate the capability of advanced numerical methods. Encouraging results have been accomplished leading to validate the supporting numerical methodologies. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics: Applications and Trends)
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23 pages, 21549 KiB  
Article
Experimental Investigation on Crack Behavior and Stress Thresholds of Sandstone Containing a Square Inclusion under Uniaxial Compression
by Quanqi Zhu and Diyuan Li
Appl. Sci. 2020, 10(21), 7621; https://doi.org/10.3390/app10217621 - 29 Oct 2020
Cited by 8 | Viewed by 2698
Abstract
To study the effect of strength, stiffness and inclination angle of square inclusions on failure characteristics of rock, uniaxial compression tests were carried out on prismatic sandstone containing a square hole with different filling modes and hole angles using a servo-hydraulic loading system. [...] Read more.
To study the effect of strength, stiffness and inclination angle of square inclusions on failure characteristics of rock, uniaxial compression tests were carried out on prismatic sandstone containing a square hole with different filling modes and hole angles using a servo-hydraulic loading system. Digital image correlation and acoustic emission techniques were jointly applied to analyze the damage and fracture process, and the crack stress thresholds were determined qualitatively and quantitatively by combining the stress–strain behavior. The results show that the mechanical properties and crack stress thresholds of pre-holed specimens increase with the increase of the strength and stiffness of inclusions, and are affected by the hole angle. Rock failure is mainly caused by secondary crack propagation and shear crack coalescence, eventually forming mixed tensile-shear failure. The crack behavior, especially the crack initiation position, is affected by the filling mode and the hole angle. Interface debonding tends to initiate at the vertical interface, while interface slipping tends to propagate along the inclined interface. Under identical loading conditions, the specimen with 45° hole is more susceptible to crack and damage than that with 0° hole. Notably, inclusions can inhibit the hole deformation and the fracture of rock matrix, especially the sidewall spalling of 0° hole. Full article
(This article belongs to the Special Issue Fatigue and Fracture Mechanics: Applications and Trends)
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