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Advances in Materials Fracture with Multiscale Modeling
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Advances in Materials Fracture with Multiscale Modeling

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

Deadline for manuscript submissions: closed (20 May 2023) | Viewed by 4656

Special Issue Editors

Prof. Dr. Zhanli Liu

E-Mail Website
Guest Editor
Department of Engineering Mechanics, Tsinghua University, Beijing, China
Interests: damage and fracture mechanics; computational mechanics
Prof. Dr. David Garoz Gómez

E-Mail Website
Guest Editor
Institute of Fusion Energy-GV, Department of Energy Engineering, Polytechnic University of Madrid, Madrid, Spain
Interests: fiber-reinforced composite based on polymer matrices; fracture mechanics; complex damage of composites materials; multiscale modeling; finite element method; materials for energy
Prof. Dr. Leiting Dong

E-Mail Website
Guest Editor
School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
Interests: fatigue and fracture; multiscale modeling; meshless method; digital twin

Special Issue Information

Dear Colleagues,

Fracture mechanics is essential for the safety analysis and design of engineering structures such as aircraft, ships, and automobiles. However, damage and fracture of materials is a complex behavior that starts at the atomistic scale then develops in the microscale with heterogeneous phases, and finally formulates observable cracks in the macroscale, which eventually leads to material fracture. Multiscale modeling enables studying the damage and fracture of materials considering the synergic contributions from various scales. Based on these understandings, this Special Issue is focused on studies of material fracture based on multiscale modeling. Relevant studies on the models, algorithms, implementations, applications, as well as findings on material fracture behaviors based on these methods are sincerely welcomed.

Prof. Dr. Zhanli Liu
Prof. Dr. David Garoz Gómez
Prof. Dr. Leiting Dong
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. 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

  • fracture mechanics
  • multiscale modeling
  • microstructure
  • crack growth
  • damage tolerance
  • fatigue
  • numerical simulation
  • experimental characterization
  • advanced material design

Published Papers (4 papers)

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Research

17 pages, 8152 KiB  
Article
An Inspection Technique for Steel Pipes Wall Condition Using Ultrasonic Guided Helical Waves and a Limited Number of Transducers
by Renaldas Raišutis, Olgirdas Tumšys, Egidijus Žukauskas, Vykintas Samaitis, Lina Draudvilienė and Audrius Jankauskas
Materials 2023, 16(15), 5410; https://doi.org/10.3390/ma16155410 - 02 Aug 2023
Cited by 1 | Viewed by 1124
Abstract
This research utilizes Ultrasonic Guided Waves (UGW) to inspect corrosion-type defects in steel pipe walls, providing a solution for hard-to-reach areas typically inaccessible by traditional non-destructive testing (NDT) methods. Fundamental helical UGW modes are used, allowing the detection of defects anywhere on the [...] Read more.
This research utilizes Ultrasonic Guided Waves (UGW) to inspect corrosion-type defects in steel pipe walls, providing a solution for hard-to-reach areas typically inaccessible by traditional non-destructive testing (NDT) methods. Fundamental helical UGW modes are used, allowing the detection of defects anywhere on the pipe’s circumference using a limited number of transducers and measurements on the upper side of the pipe. Finite element (FE) modeling and experiments investigated generating and receiving UGW helical waves and their propagation through varying corrosion-type defects. Defect detection is based on phase delay differences in the helical wave’s signal amplitude peaks between defective and defect-free regions. Phase delay variations were noted for the different depths and spatial dimensions of the defects. These results highlight the phase delay method’s potential for NDT pipeline inspection. Full article
(This article belongs to the Special Issue Advances in Materials Fracture with Multiscale Modeling)
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17 pages, 6607 KiB  
Article
Fracture Toughness and Fatigue Crack Growth Analyses on a Biomedical Ti-27Nb Alloy under Constant Amplitude Loading Using Extended Finite Element Modelling
by Mohammed Y. Abdellah and Hamzah Alharthi
Materials 2023, 16(12), 4467; https://doi.org/10.3390/ma16124467 - 19 Jun 2023
Cited by 3 | Viewed by 951
Abstract
The human body normally uses alternative materials such as implants to replace injured or damaged bone. Fatigue fracture is a common and serious type of damage in implant materials. Therefore, a deep understanding and estimation or prediction of such loading modes, which are [...] Read more.
The human body normally uses alternative materials such as implants to replace injured or damaged bone. Fatigue fracture is a common and serious type of damage in implant materials. Therefore, a deep understanding and estimation or prediction of such loading modes, which are influenced by many factors, is of great importance and attractiveness. In this study, the fracture toughness of Ti-27Nb, a well-known implant titanium alloy biomaterial, was simulated using an advanced finite element subroutine. Furthermore, a robust direct cyclic finite element fatigue model based on a fatigue failure criterion derived from Paris’ law is used in conjunction with an advanced finite element model to estimate the initiation of fatigue crack growth in such materials under ambient conditions. The R-curve was fully predicted, yielding a minimum percent error of less than 2% for fracture toughness and less than 5% for fracture separation energy. This provides a valuable technique and data for fracture and fatigue performance of such bio-implant materials. Fatigue crack growth was predicted with a minimum percent difference of less than nine for compact tensile test standard specimens. The shape and mode of material behaviour have a significant effect on the Paris law constant. The fracture modes showed that the crack path is in two directions. The finite element direct cycle fatigue method was recommended to determine the fatigue crack growth of biomaterials. Full article
(This article belongs to the Special Issue Advances in Materials Fracture with Multiscale Modeling)
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16 pages, 8365 KiB  
Article
Thermomechanical Peridynamic Modeling for Ductile Fracture
by Shankun Liu, Fei Han, Xiaoliang Deng and Ye Lin
Materials 2023, 16(11), 4074; https://doi.org/10.3390/ma16114074 - 30 May 2023
Viewed by 975
Abstract
In this paper, we propose a modeling method based on peridynamics for ductile fracture at high temperatures. We use a thermoelastic coupling model combining peridynamics and classical continuum mechanics to limit peridynamics calculations to the failure region of a given structure, thereby reducing [...] Read more.
In this paper, we propose a modeling method based on peridynamics for ductile fracture at high temperatures. We use a thermoelastic coupling model combining peridynamics and classical continuum mechanics to limit peridynamics calculations to the failure region of a given structure, thereby reducing computational costs. Additionally, we develop a plastic constitutive model of peridynamic bonds to capture the process of ductile fracture in the structure. Furthermore, we introduce an iterative algorithm for ductile-fracture calculations. We present several numerical examples illustrating the performance of our approach. More specifically, we simulated the fracture processes of a superalloy structure in 800 ℃ and 900 ℃ environments and compared the results with experimental data. Our comparisons show that the crack modes captured by the proposed model are similar to the experimental observations, verfying the validity of the proposed model. Full article
(This article belongs to the Special Issue Advances in Materials Fracture with Multiscale Modeling)
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16 pages, 4372 KiB  
Article
Nonlinear Strength Reduction Method of Rock Mass in Slope Stability Evaluation
by Yifan Chen, Yizhou Chen, Hang Lin and Huihua Hu
Materials 2023, 16(7), 2793; https://doi.org/10.3390/ma16072793 - 31 Mar 2023
Cited by 2 | Viewed by 1050
Abstract
As the strength parameters of rock mass degrade differently during slope instability, different factors should be considered in the strength reduction method. Previous nonlinear reduction methods were essentially implemented based on the Mohr–Coulomb criterion, which was reported not to reflect the nonlinear performance [...] Read more.
As the strength parameters of rock mass degrade differently during slope instability, different factors should be considered in the strength reduction method. Previous nonlinear reduction methods were essentially implemented based on the Mohr–Coulomb criterion, which was reported not to reflect the nonlinear performance of rock mass. To address this deficiency, in this study, the Hoek–Brown criterion was combined with a nonlinear reduction technique for slope stability evaluation. Firstly, based on the classical definition of safety factors, the relationships that should be satisfied by each parameter of the critical slope were derived. The critical curve of the slope regarding the Hoek–Brown constant mb and the uniaxial compressive strength of rock mass σcmass was then obtained. On the assumption that the slope parameter deterioration conforms to the shortest path theory, the reduction ratio of σcmass to mb was determined. The more objective k-means algorithm was employed to automatically search the potential sliding surface, on which the slope safety factor was calculated as the ratio of sliding resistance to sliding force. Finally, the slopes in published literature were adopted for verification, and the calculated safety factors were compared with those by other methods, which showed better efficacy. Full article
(This article belongs to the Special Issue Advances in Materials Fracture with Multiscale Modeling)
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