Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.3
2.2
Journals
Symmetry
Special Issues
Feature Papers in Section "Engineering and Materials" 2025
share announcement

Feature Papers in Section "Engineering and Materials" 2025

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 2168

Special Issue Editor

Prof. Dr. Vasilis K. Oikonomou

E-Mail Website
Guest Editor
Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: cosmology; inflationary cosmology; modified theories of gravity; physics of the early universe; dark energy; dark matter; supersymmetry; mathematical physics; high energy physics; theoretical physics; epistemic game theory; game theory
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The multidisciplinary Section “Engineering and Materials" of the Symmetry journal welcomes original research articles with top-level mathematical modeling or experimental outcomes and strongly substantiated conclusions and results, as well as relevant analytical reviews on all aspects of symmetry or asymmetry in engineering, materials, energy sciences, or other interdisciplinary areas.

We aim to provide a virtual forum and database for experts publishing papers with engineering significance, who are dedicated to the most up-to-date issues and mainstream topics. The Section will fill the gap of mathematical modeling in these areas in the scientific literature, emphasizing articles related to cutting-edge technologies and contemporary technology applications. Articles are expected to have original content and demonstrate clear scientific novelty.

Other areas of interest include those associated with engineering and materials science which require a multidisciplinary approach.

Prof. Dr. Vasilis K. Oikonomou
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 250 words) can be sent to the Editorial Office for assessment.

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. Symmetry is an international peer-reviewed open access monthly 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

  • materials engineering
  • nanotechnology
  • power systems and thermal engineering
  • mechanical engineering, mechatronics, and robotics
  • automation and control engineering
  • electronic engineering
  • communication engineering
  • chemical and molecular engineering
  • optical engineering and technology
  • fiber optics technology
  • mathematical and formal aspects of superconductivity
  • mechanochemical aspects of aqueous solutions
  • green chemistry fabrication of materials

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

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

Published Papers (5 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

14 pages, 3043 KB  
Article
First-Principles Study of AlCrFeMoTi High-Entropy Alloys
by Xiao Hu, Yilong Liu, Yunyun Wu, Shuliang Zou, Weiwei Xiao and Jinghao Huang
Symmetry 2025, 17(11), 1965; https://doi.org/10.3390/sym17111965 - 14 Nov 2025
Viewed by 331
Abstract
The AlCrFeMoTi high-entropy alloy exhibits promising application potential as a corrosion-resistant structural material in advanced nuclear energy systems, particularly in lead–bismuth fast reactors. In this present study, first-principles calculation based on the density functional theory was employed to investigate the phase and electronic [...] Read more.
The AlCrFeMoTi high-entropy alloy exhibits promising application potential as a corrosion-resistant structural material in advanced nuclear energy systems, particularly in lead–bismuth fast reactors. In this present study, first-principles calculation based on the density functional theory was employed to investigate the phase and electronic structure of AlCrFeMoTi HEA. The Gibbs free energy calculation results and XRD experimental results both indicate that the BCC phase is more stable for AlCrFeMoTi HEA. The atom distribution model was constructed according to the site preference of atoms occupying sublattices. The results indicate that alloying atoms have an obvious site preference. For example, Fe, Mo, and Cr atoms always prefer the 1a sublattice, while Al and Ti atoms tend to favor the 1b sublattice. And the atom site preference is temperature-sensitive. At 973 K, the site occupancy configuration is (Al5Cr16Fe26Mo17Ti0)1a(Al21Cr9Fe0Mo9Ti25)1b. Based on the steady-state phase structure, the band structure, density of states, and charge density were calculated. The electronic structure results show that metal bonds are formed between alloying elements in AlCrFeMoTi HEA, exhibiting strong metallic properties. Full article
(This article belongs to the Special Issue Feature Papers in Section "Engineering and Materials" 2025)
►▼ Show Figures

Figure 1

26 pages, 1030 KB  
Article
Symmetry Optimized Water Flooding Characteristic Curves: A Framework for Balanced Prediction and Economic Decision Making in Heterogeneous Reservoirs
by Xiao Guo, Honglin Ren, Lingfeng Du, Yiting Guan and Youbin He
Symmetry 2025, 17(11), 1924; https://doi.org/10.3390/sym17111924 - 10 Nov 2025
Viewed by 319
Abstract
As a cornerstone of recoverable reserve prediction in water flooding projects, characteristic curve analysis has proven to be critical for reservoir management in the G Oilfield. This study introduces an enhanced methodology that significantly improves prediction accuracy through three key innovations: (1) development [...] Read more.
As a cornerstone of recoverable reserve prediction in water flooding projects, characteristic curve analysis has proven to be critical for reservoir management in the G Oilfield. This study introduces an enhanced methodology that significantly improves prediction accuracy through three key innovations: (1) development of a modified Type A curve with correction factor c to address early-stage nonlinear deviations, reducing prediction errors from 12.7% to 4.3% across 35 wells; (2) establishment of phase-specific model selection criteria demonstrating Type C curve superiority (>80% water cut) versus Zhang/Yu-type curves’ effectiveness in heterogeneous reservoirs (water cut ≥ 50%, errors < 5%); and (3) implementation of an integrated workflow incorporating linear segment optimization and economic threshold standardization. Field validation through 15-year production data (2008–2023) confirms <6% error in recovery factor predictions, significantly enhancing development strategy formulation. The technical framework provides novel insights into the water flooding curve theory while offering practical solutions for mature field management, particularly in complex continental reservoirs. Full article
(This article belongs to the Special Issue Feature Papers in Section "Engineering and Materials" 2025)
►▼ Show Figures

Figure 1

20 pages, 3881 KB  
Article
Symmetry–Asymmetry Framework for Rubberized Concrete: Correlations Between Mixture Design and Rubber Properties and Concrete Flowability and Mechanical Characteristics, and Three-Stage Transition of Compressive Strength
by Tetsuya Kouno, Yu Qiu and Rui Tang
Symmetry 2025, 17(11), 1917; https://doi.org/10.3390/sym17111917 - 8 Nov 2025
Viewed by 301
Abstract
This study systematically investigated the effects of mix design conditions (water–cement ratio) and rubber properties (particle size, surface area, and mixing ratio) on the flowability and mechanical characteristics of rubberized concrete, in which rubber particles were incorporated as part of the fine aggregate. [...] Read more.
This study systematically investigated the effects of mix design conditions (water–cement ratio) and rubber properties (particle size, surface area, and mixing ratio) on the flowability and mechanical characteristics of rubberized concrete, in which rubber particles were incorporated as part of the fine aggregate. The fresh properties (slump and air content) and hardened properties (compressive strength and Young’s modulus) were measured, and their correlations with rubber surface area and mixing ratio were analyzed. The results showed that slump and air content converged to constant values with increasing rubber surface area, exhibiting symmetric behavior. These characteristics were accurately approximated using logistic and exponential functions. In contrast, compressive strength did not decrease monotonically with increasing rubber content but could be divided into three distinct regions: a low-substitution region (Region I), an intermediate transition region (Region II), and a high-substitution region (Region III). Particularly in Region II, where the rate of strength reduction increased sharply, the logistic function was found to describe the asymmetric behavior more appropriately than the conventional exponential function. Furthermore, an estimation formula incorporating a correction term into the logistic function was proposed to account for the influence of the W/C ratio on compressive strength. This two-stage estimation model achieved higher predictive accuracy than conventional equations, eliminating the 0.88 bias observed in previous models. Finally, a practical design methodology based on this two-stage model was presented, demonstrating its applicability to concrete with various mixture ratios and water–cement ratios. Full article
(This article belongs to the Special Issue Feature Papers in Section "Engineering and Materials" 2025)
►▼ Show Figures

Figure 1

26 pages, 8666 KB  
Article
A Robust Lagrangian Implicit Material Point Method for Accurate Large-Deformation Analysis
by Qin-Yang Sang, Zhi-Gang Liu, Yong-Lin Xiong, Rong-Xing Wu and Jiang-Hua Yan
Symmetry 2025, 17(11), 1876; https://doi.org/10.3390/sym17111876 - 5 Nov 2025
Viewed by 382
Abstract
The material point method (MPM) has shown significant potential for simulating problems involving large deformations. However, many implicit MPM formulations based on the traditional Updated Lagrangian (UL) scheme still face challenges in terms of computational stability. In this study, we propose a novel [...] Read more.
The material point method (MPM) has shown significant potential for simulating problems involving large deformations. However, many implicit MPM formulations based on the traditional Updated Lagrangian (UL) scheme still face challenges in terms of computational stability. In this study, we propose a novel Lagrangian equilibrium formulation for an implicit MPM that is tailored to large-deformation problems. (1) The previously converged state is utilized to simplify stiffness matrix computations, thereby improving the stability of the algorithm. (2) The framework supports a variety of high-order interpolation functions, which effectively mitigate numerical artifacts such as cell-crossing errors. (3) The B-bar technique is further incorporated to suppress spurious stress oscillations in the incompressible limit. The proposed method is validated through two classical benchmark tests, the simple shear of a single element and the cantilever beam problem, by comparing the simulation results with analytical solutions and alternative numerical approaches. Finally, its capability is demonstrated in slope stability and strip footing analyses, confirming the superior accuracy, stability, and robustness of the method for large-deformation elastoplastic problems. Full article
(This article belongs to the Special Issue Feature Papers in Section "Engineering and Materials" 2025)
►▼ Show Figures

Figure 1

23 pages, 3161 KB  
Article
Characterizing Hydraulic Fracture Morphology and Propagation Patterns in Horizontal Well Stimulation via Micro-Seismic Monitoring Analysis
by Longbo Lin, Xiaojun Xiong, Zhiyuan Xu, Xiaohua Yan and Yifan Wang
Symmetry 2025, 17(10), 1732; https://doi.org/10.3390/sym17101732 - 14 Oct 2025
Viewed by 428
Abstract
In horizontal well technology, hydraulic fracturing has been established as an essential technique for enhancing hydrocarbon production. However, the complex architecture of fracture networks challenges conventional monitoring methods. Micro-seismic monitoring, recognized for its superior resolution and sensitivity, enables precise fracture morphology characterization. This [...] Read more.
In horizontal well technology, hydraulic fracturing has been established as an essential technique for enhancing hydrocarbon production. However, the complex architecture of fracture networks challenges conventional monitoring methods. Micro-seismic monitoring, recognized for its superior resolution and sensitivity, enables precise fracture morphology characterization. This study advances diagnostic capabilities through integrated field–laboratory investigations and multi-domain signal processing. Hydraulic fracturing experiments under varied geological conditions generated critical micro-seismic datasets, with quantitative analyses revealing asymmetric propagation patterns (total length 312 ± 15 m, east wing 117 m/west wing 194 m) forming a 13.37 × 104 m3 stimulated reservoir volume. Spatial event distribution exhibited density disparities correlating with geophone offsets (west wing 3.8 events/m vs. east 1.2 events/m at 420–794 m distances). Advanced time–frequency analyses and inversion algorithms differentiated signal characteristics demonstrating logarithmic SNR (Signal-to-Noise Ratio)–magnitude relationships (SNR 0.49–4.82, R2 = 0.87), with near-field events (<500 m) showing 68% reduced magnitude variance compared to far-field counterparts. Coupled numerical simulations confirmed stress field interactions where fracture trajectories deviated 5–15° from principal stress directions due to prior-stage stress shadows. Branch fracture networks identified in Stages 4/7/9/10 with orthogonal/oblique intersections (45–65° dip angles) enhanced stimulation reservoir volume (SRV) by 37–42% versus planar fractures. These geometric parameters—including height (20 ± 3 m), width (44 ± 5 m), spacing, and complexity—were quantitatively linked to micro-seismic response patterns. The developed diagnostic framework provides operational guidelines for optimizing fracture geometry control, demonstrating how heterogeneity-driven signal variations inform stimulation strategy adjustments to improve reservoir recovery and economic returns. Full article
(This article belongs to the Special Issue Feature Papers in Section "Engineering and Materials" 2025)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-5
Back to TopTop