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Extreme Mechanics in Multiscale Analyses of Materials (Volume II)
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Extreme Mechanics in Multiscale Analyses of Materials (Volume II)

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

Deadline for manuscript submissions: 20 June 2024 | Viewed by 2464

Special Issue Editors

Dr. Bin Wang

E-Mail Website
Guest Editor
Department of Mechanical and Aerospace Engineering, Brunel University London, Uxbridge, London UB8 3PH, UK
Interests: constitutive laws of materials; composites; stress and structural analysis; fracture and fatigue; functional materials; biomechanics; impact and dynamics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Arash Soleiman-Fallah

E-Mail Website
Guest Editor
Faculty of Technology, Art and Design, Department of Mechanical, Electronics and Chemical Engineering, Oslo Metropolitan University, Pilestredet 46, 0167 Oslo, Norway
Interests: composite materials; phononic metamaterials; lattice dynamics; XFEM; peridynamics; impact mechanics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metals, composites, ceramics, and biological materials are functional materials found in nature or are synthesized to be used in the design of structural components in order to bear static, dynamic, and thermal loads. In extreme conditions, e.g., because of ballistic impacts, thermal shocks, or excessive loading, materials respond differently to the service loading state. Phenomena such as fracture, dislocation dynamics, and viscoplasticity emerge as a result of these extreme conditions and affect strain and stress fields substantially. A thorough understanding of these phenomena requires multiscale simulation, testing, and analyses.

This Special Issue is concerned with investigations of material behavior in extreme loading conditions using multiscale analyses. Scientifically sound and well-organized analytical, computational, and experimental studies are being solicited. Areas such as micromechanics, mesoscale simulation, and bottom-up modeling across many scales, from atomistic simulations to a continuum level, are of interest. Fields such as multiscale experimentation of fractures, dislocation dynamics, shock front and damage discontinuity in materials, viscoplasticity, and thermal shock effects are among the subjects of relevance and interest. Contributions to experimental studies that advance knowledge of the response of materials subjected to deterministic and accidental extreme loads should be accompanied by analyses of the experimental data and appropriate conclusions.

Dr. Bin Wang
Prof. Dr. Arash Soleiman-Fallah
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

  • micromechanics
  • multiscale simulation
  • mesoscale modelling
  • atomistic simulations
  • experimental multiscale analysis
  • adaptive multiscale modelling
  • dynamic homogenization
  • thermal fracture
  • dynamic fracture
  • excessive loading

Related Special Issue

Published Papers (3 papers)

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Research

16 pages, 7280 KiB  
Article
Analysis of Crack Propagation Behaviors in RPV Dissimilar Metal Welded Joints Affected by Residual Stress
by Lingyan Zhao, Yuchun Sun, Zheren Shi and Bin Yang
Materials 2023, 16(19), 6578; https://doi.org/10.3390/ma16196578 - 06 Oct 2023
Viewed by 771
Abstract
In severe service environments, the presence of high local residual stress, significant organizational gradient, and nonlinear changes in material properties often leads to stress corrosion cracking (SCC) in dissimilar metal welded (DMW) joints. To accurately predict the crack growth rate, researching the initiation [...] Read more.
In severe service environments, the presence of high local residual stress, significant organizational gradient, and nonlinear changes in material properties often leads to stress corrosion cracking (SCC) in dissimilar metal welded (DMW) joints. To accurately predict the crack growth rate, researching the initiation and propagation behavior of SCC cracks in DMW joints under residual stress (RS) is one of the most important methods to ensure the safe operation of nuclear power plants. Using the extended finite element method (XFEM), the crack propagation behaviors in DMW joints under different RS states are predicted and compared. The effects of RS, crack location, and initial crack length on crack propagation behavior are investigated. The crack in a DMW joint without RS deflects to the material of low yield strength. High residual stress urges the crack growing direction to deflect toward the material of high yield strength. Young’s modulus has little impact on the crack deflection paths. The distance between the specimen symmetric line and the boundary line has little effect on the crack initiation and propagation within the RS field. A long initial crack is more likely to initiate and propagate than a short crack. To a long crack and the crack that is far from the interface of two materials, the impact of residual stress on the crack propagation path is significant when it is located in a material with high yield strength, while when the initial crack is located in the material with low yield strength, RS has a great influence on the deflection of a short crack growth direction on the condition that the crack is adjacent to the interface. Full article
(This article belongs to the Special Issue Extreme Mechanics in Multiscale Analyses of Materials (Volume II))
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21 pages, 4934 KiB  
Article
Modeling Corrosion Product Film Formation and Hydrogen Diffusion at the Crack Tip of Austenitic Stainless Steel
by Fuqiang Yang, Jianzhou Zhang and Yue Zhang
Materials 2023, 16(17), 5799; https://doi.org/10.3390/ma16175799 - 24 Aug 2023
Cited by 1 | Viewed by 628
Abstract
Corrosion product films (CPFs) have significant effects on hydrogen permeation and the corrosion process at the crack tip. This paper established a two-dimensional calculation model to simulate the formation of CPFs at the crack tip and its effects on the crack tip stress [...] Read more.
Corrosion product films (CPFs) have significant effects on hydrogen permeation and the corrosion process at the crack tip. This paper established a two-dimensional calculation model to simulate the formation of CPFs at the crack tip and its effects on the crack tip stress status and hydrogen diffusion. The CPFs were simplified as a single-layer structure composed of Fe2O3, the effective CPFs boundary was modeled by the diffusion of oxygen, and the CPF-induced stress was modeled by hygroscopic expansion. The simulation was conducted with two stages; the first stage was to simulate the formation of CPFs formation and its effects on the crack tip stress status, while the second stage focused on the hydrogen diffusion with and without CPF formation under different external tensile loads. The results indicate that the highest compressive stress induced by the formation of CPFs is located at 50~60° of the crack contour and dramatically weakens the crack tip tensile stress at low-stress status. The CPFs can inhibit the hydrogen permeation into the crack tip, and the hydrostatic pressure effects on the redistribution of the permeated hydrogen are significant under larger external load conditions. Full article
(This article belongs to the Special Issue Extreme Mechanics in Multiscale Analyses of Materials (Volume II))
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19 pages, 13960 KiB  
Article
New Numerical Method Based on Linear Damage Evolution Law for Predicting Mechanical Properties of TiB2/6061Al
by Weigang Fu, Junchi Ma, Zhe Liao, Huanjie Xiong, Yaoming Fu and Bin Wang
Materials 2023, 16(13), 4786; https://doi.org/10.3390/ma16134786 - 03 Jul 2023
Cited by 2 | Viewed by 724
Abstract
In order to study the effect of TiB2 particles on the mechanical properties of TiB2/6061Al composites, a series of 3D TiB2/6061Al representative volume elements (RVEs) were established based on SEM photos. This model took into account the ductile [...] Read more.
In order to study the effect of TiB2 particles on the mechanical properties of TiB2/6061Al composites, a series of 3D TiB2/6061Al representative volume elements (RVEs) were established based on SEM photos. This model took into account the ductile damage of the matrix and the traction separation behavior of the interface, and the linear damage evolution law was introduced to characterize stiffness degradation in the matrix elements. Mixed boundary conditions were used in the RVE tensile experiments, and the accuracy of the predicted result was verified by the agreement of the experimental stress-strain curve. The results showed that the addition of TiB2 particles can effectively promote the load-bearing capacity of the composite, but elongation is reduced. When the weight fraction of TiB2 increased from 2.5% to 12.5%, the elastic modulus, yield strength, and tensile strength increased by 8%, 10.37%, and 11.55%, respectively, while the elongation decreased by 10%. The clustering rate of the TiB2 particles is also an important factor affecting the toughness of the composites. With an increase in the clustering rate of TiB2 particles from 20% to 80%, the load-bearing capacity of the composites did not improve, and the elongation of the composites was reduced by 8%. Moreover, the high-strain region provides a path for rapid crack propagation, and particle spacing is a crucial factor that affects the stress field. Full article
(This article belongs to the Special Issue Extreme Mechanics in Multiscale Analyses of Materials (Volume II))
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