Article
Mathematics, Applied
E. J. P. Miranda, S. F. Rodrigues, C. Aranas, J. M. C. Dos Santos
Summary: The study presents new formulations for analyzing the complex dispersion relation of flexural waves in a metamaterial Mindlin-Reissner thick plate with multiple periodic resonators, using the PWE and EPWE methods. These formulations provide more accurate results at higher frequencies compared to traditional thin plate theories. Multiple periodic resonators with multiple degrees of freedom attached to metamaterial plates broaden the applications for wave attenuation in high frequencies.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2022)
Article
Acoustics
E. J. P. Miranda Jr, V. F. Dal Poggetto, N. M. Pugno, J. M. C. Dos Santos
Summary: This study focuses on the design of phononic crystals in viscoelastic thin plates, and derives the complex band structure using the extended plane wave expansion (EPWE) method, considering the Kirchhoff-Love plate theory and viscosity effects. The study found that viscoelasticity has a significant impact on the propagation and evanescent behavior of phonons, and the maximum wave attenuation occurs at a specific filling fraction.
Article
Instruments & Instrumentation
Xi Cao, Chunlin Jia, Hongchen Miao, Guozheng Kang, Chuanzeng Zhang
Summary: In this study, metasurfaces based on multiple arch-shaped strips were designed to generate plane SH0 wave from a cylindrical wave source and realize anomalous refraction of SH0 wave. The performance of these designed metasurfaces in generating plane SH0 wave and manipulating its propagation was validated through experiments, demonstrating their potential applications in NDT and SHM.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Lingyun Ding, Jingfang Huang, Jeremy L. Marzuola, Zhuochao Tang
Summary: The QBX technique accurately evaluates layer potentials in the integral equation reformulations of partial differential equations, while the QB2X method extends this by using new local complex polynomial and plane wave type expansions to represent Laplace layer potentials. QB2X method allows analysis of far-field contributions and high frequency properties, and can be easily adopted in existing fast integral equation solvers based on FMM.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Mechanical
Vinicius F. Dal Poggetto, Edson J. P. Miranda, Jose Maria C. Dos Santos, Nicola M. Pugno
Summary: Phononic crystals are periodic structures designed to manipulate mechanical waves efficiently by arranging materials with contrasting properties. Analyzing the propagating characteristics of PCs is crucial for viscoelastic components, and the complexity of PCs with hierarchical material distributions can pose challenges in calculating the band structure.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Zhongsheng Chen, Yeping Xiong, Yongxiang Wei
Summary: A binary-like topology optimization scheme is proposed to optimize the bandgap of a piezoelectric metamaterial plate (PMP), along with a coupling model for a self-powered synchronized charge extraction circuit. The results demonstrate that maximum bandgap can be achieved at a given frequency through extended genetic algorithm and numerical analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Acoustics
Leang Sim Nguon, Suhyun Park
Summary: In this study, a deep learning-based extended aperture image reconstruction method is proposed to enhance the boundary region of B-mode images. The method reconstructs an image using pre-beamformed raw data from the half-aperture of the ultrasound probe. The results show that the proposed method achieves significant improvement in terms of multi-scale structure similarity and peak signal-to-noise ratio at the boundary region.
Article
Optics
Yichen Zeng, Song Han, Guoxing Zheng, Zhongyang Li, Yongquan Zeng
Summary: In this work, a zero-index material (ZIM) is proposed to control the in-plane emission of planar random optical modes while maintaining the intrinsic disordered features. By enclosing a disordered structure with a ZIM based on all-dielectric photonic crystal (PhC), broadband emission directionality improvement can be obtained. The method is robust and can be effectively applied to different structural parameters of the disordered medium.
Article
Engineering, Mechanical
Rongyu Xia, Jueyong Zhu, Jianlin Yi, Shixuan Shao, Zheng Li
Summary: The study focuses on the dispersion relation of guided wave modes in a multilayered piezoelectric plate, developing an effective analysis method for designing guided wave control devices. Results indicate that different types of piezoelectric scatterers influence the propagation of guided waves.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Acoustics
Akira Higashikawa, Yoshiteru Uchida, Manabu Sasajima, Tsutomu Kaizuka
Summary: In this study, a loudspeaker array for enhancing the near field in personal audio systems is designed based on the theory of generalized radiation modes. The array is designed according to the eigenvector with the largest eigenvalue to maximize the reactive-to-active ratio of the acoustic power. A planar array consisting of nine loudspeakers is constructed, and the acoustic radiation characteristics are experimentally investigated.
Article
Chemistry, Multidisciplinary
Jian Xu, Kean Chen, Lei Wang, Jiangong Zhang
Summary: This study proposes a two-stage method to address the problem of basis mismatch in low-frequency sound field reconstruction in an enclosed space. The method combines sparse Bayesian learning and a parameterized dictionary to optimize plane wave directions and improve acoustic mode approximation accuracy.
APPLIED SCIENCES-BASEL
(2022)
Article
Mechanics
Jeslin Thalapil, Shruti Sawant, Siddharth Tallur, Sauvik Banerjee
Summary: This paper presents a numerical investigation of the interaction between fiber waviness and the S0 mode in a bonded composite structure. The change in group velocity predicted by the model agrees well with analytical calculations, and a DI mapping algorithm is used for localization of fiber waviness region.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Jian-Fei Lu, Ya-Jie Huang
Summary: In this study, a plane wave finite element method for 2D phononic crystals under elastic waves is proposed. FE equations for each plane wave are established using the virtual work principle and conventional finite element procedure. By synthesizing contributions from all plane waves via the DFT method, the dynamic response of the phononic crystal layer to incident waves is determined.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Physics, Multidisciplinary
Soroush Sepehri, Mahmoud Mosavi Mashhadi, Mir Masoud Seyyed Fakhrabadi
Summary: This study investigates the manipulation of wave motion in phononic crystals using shape memory alloys (SMAs), extending their application to nonlinear lattices. Results show that SMAs have significant effects on wave propagation through temperature-induced phase transformation and stiffness nonlinearity.
Article
Multidisciplinary Sciences
Ali Araghi, Mohsen Khalily, Okan Yurduseven, Pei Xiao, Rahim Tafazolli
Summary: A hybrid technique is proposed to enhance the radiation characteristics of a substrate integrated waveguide H-plane horn. This technique corrects the phase of fields and forms a quasi-uniform distribution in the flare section using a modulated metal-via lens, and recycles and directs the backward surface waves using holographic-based metallic strips on dielectric slabs. With this technique, the structure achieves improved gain, reduced sidelobe-level, and increased front-to-back ratio.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Nelson Luis Costa dos Santos Filho, Eden Santos Silva, Clodualdo Aranas, Fulvio Siciliano, Gedeon Silva Reis, Samuel Filgueiras Rodrigues
Summary: The study investigated the correlation between hardening and softening in ASTM F-1586 stainless steel used as biomaterial through hot torsion simulations under continuous cooling. The results showed a direct dependence of mean flow stress and all applied thermomechanical parameters.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Mathematics, Applied
E. J. P. Miranda, S. F. Rodrigues, C. Aranas, J. M. C. Dos Santos
Summary: The study presents new formulations for analyzing the complex dispersion relation of flexural waves in a metamaterial Mindlin-Reissner thick plate with multiple periodic resonators, using the PWE and EPWE methods. These formulations provide more accurate results at higher frequencies compared to traditional thin plate theories. Multiple periodic resonators with multiple degrees of freedom attached to metamaterial plates broaden the applications for wave attenuation in high frequencies.
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Kayron Lima Silva, Samuel Filgueiras Rodrigues, Glaucia Maria Evangelista Macedo, Bruno Leonardy Sousa Lopes, Clodualdo Aranas, Fulvio Siciliano, Gedeon Silva Reis, Eden Santos Silva
Summary: This research investigated the Z-Phase solubility product of austenitic stainless steel used as orthopedic implants, revealing that the precipitates acted as softening inhibitors and suppressed grain growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Thayane Portela Oliveira, Samuel Filgueiras Rodrigues, Gleison Neres Marques, Rayssa Cristina Viana Costa, Charlyanne Gabriela Garcone Lopes, Clodualdo Aranas, Alex Rojas, Jose Hilton Gomes Rangel, Marcelo Moizinho Oliveira
Summary: CuFe2O4 photocatalysts were synthesized by solution combustion synthesis method and characterized for their application in photodegradation of synthetic dyes. The results showed the presence of different phases and morphologies depending on the heat treatment temperature. The photocatalytic efficiency of the samples was found to be influenced by the heat treatment temperature and was highest at 400 degrees C.
Article
Materials Science, Multidisciplinary
Glaucia Adriane de Sousa Sulzbach, Maria Veronica Goncalves Rodrigues, Samuel Filgueiras Rodrigues, Glaucia Maria Evangelista Macedo, Hamilton Ferreira Gomes de Abreu, Clodualdo Aranas, Gedeon Silva Reis, Eden Santos Silva
Summary: This research characterizes the dynamic softening behavior of high N-containing austenitic stainless steel under conditions resembling industrial manufacturing. The results indicate that the material's behavior is influenced by competition between work hardening, dynamic recovery, and dynamic recrystallization mechanisms, as well as stacking fault energy and grain boundary microstructures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Marcos Natan da Silva Lima, Rodrigo de Carvalho Paes Loureiro, Miloslav Beres, Mohammad Masoumi, Jessica Calvo Munoz, Samuel Filgueiras Rodrigues, Hamilton Ferreira Gomes de Abreu, Jose Maria Cabrera Marrero
Summary: The correlation between microstructure, crystallographic orientation, and grain boundaries characteristics of an austenitic high manganese steel was systematically investigated. It was found that the fraction of low-energy 13 twin boundaries significantly increased in the 70% deformed sample, coupled with the formation of {011} austenitic structure and twinning-induced plasticity. The observed ductile-brittle fracture mode in the 70% cold-rolled sample can be attributed to the high fraction of low-energy 13 twin boundaries.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Glaucia Adriane de S. Sulzbach, Maria Veronica G. Rodrigues, Samuel F. Rodrigues, Marcos Natan da S. Lima, Rodrigo de C. Paes Loureiro, Denis Fabricio S. de Sa, Clodualdo Aranas, Glaucia Maria E. Macedo, Fulvio Siciliano, Hamilton F. Gomes de Abreu, Gedeon S. Reis, Eden S. Silva
Summary: Physical simulation is a useful tool for studying thermomechanical processing. In this study, an artificial neural network was developed to optimize the thermomechanical behavior of stainless-steel biomaterial in a double-pass hot compression test. The results showed good agreement between the experimental and simulated results, indicating that the ANN can optimize the distribution and refinement of grains for better mechanical properties.
Article
Nanoscience & Nanotechnology
Marcos Natan da Silva Lima, Guilherme Luis Franca Schmalz, Rodrigo de Carvalho Paes Loureiro, Joao Carlos Ferreira, Samuel Filgueiras Rodrigues, Jessica Calvo Munoz, Jose Maria Cabrera Marrero, Hamilton Ferreira Gomes de Abreu
Summary: An experimental TWIP steel was deformed under hot torsion tests at different total equivalent strains. The effects of torsional deformation on the microstructure, texture, and mechanical properties were investigated. It was found that the main deformation mechanism changed from conventional sliding to nucleated twinning. The best balance between strength and ductility was achieved after a total equivalent strain of 2.6.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Pedro H. Pinheiro, Mohammad Masoumi, Luis Flavio G. Herculano, Joao Victor B. Xavier, Samille Kricia B. de Lima, Eden S. Silva, Gedeon S. Reis, Samuel F. Rodrigues, Hamilton F. Gomes de Abreu
Summary: Flexible pipelines, which are highly flexible, applicable, and recyclable, are used to connect offshore platforms to subsea production systems. The armor layers in these pipelines are constructed using the parallel helical wrapping of rectangular wires. Due to the complex stress modes, unpredictable failure modes occur, requiring expensive pipeline integrity verification methods.
Article
Materials Science, Multidisciplinary
Marcos Natan da Silva Lima, Samuel Filgueiras Rodrigues, Majid Al-Maharbi, Jessica Calvo Munoz, Jose Maria Cabrera Marrero, Hamilton Ferreira Gomes de Abreu
Summary: The development of microstructure and texture of TWIP steel sheet during ECAP at different temperatures were studied, and the effect of temperature during the severe plastic deformation process was compared. The results showed that the volume fraction of twins, dislocation density, and yield strength increased while ductility decreased after ECAP. The best balance between high strength and good ductility was achieved after four passes at 250 degrees C and 350 degrees C.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Pablo B. Paiva Leao, Joao R. Barros Neto, Samuel Filgueiras Rodrigues, Ladislav Novotny, Jorge Luiz Cardoso, Luis Flavio Gaspar Herculano, Tiago Nunes Lima, Antonio J. Ramirez, Hamilton Ferreira G. de Abreu
Summary: The deformation and fracture behaviors of undeformed-coarse (UC) and deformed-refined (DR) pearlitic steel microstructure were investigated via in-situ tensile-shear (TS) test in scanning electron microscopy (SEM). The results showed that the DR pearlitic microstructure presented a higher shear strength and absorbed energy compared to UC during the TS performance. Strain concentration and decohesion phenomena were observed in both UC and DR microstructures, leading to fractures mainly comprised of a sheared flat surface and dimples, respectively.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Francisco Felipe de M. Fideles, Mauro Andres C. Florez, Maria Veronica G. Rodrigues, Jorge Luiz Cardoso, Clodualdo Aranas Jr, Samuel F. Rodrigues, Marcos Natan da S. Lima, Caio Victor P. Pascoal, Thiago Alves de Moura, Gedeon S. Reis, Eden S. Silva, Hamilton F. Gomes de Abreu
Summary: This study compares the electrochemical performance of three types of pearlitic steels used in flexible pipelines for oil transport in marine environments. The results show that spheroidized steel exhibits the best corrosion resistance under simulated marine conditions and high temperatures. Raman spectroscopy analysis reveals the presence of siderite and other corrosive oxides in the corrosion products formed during the tests.
Article
Materials Science, Multidisciplinary
Breno Rabelo Coutinho Saraiva, Ladislav Novotny, Bruno Carpentieri, Thomas Florian Keller, Maria Faberova, Radovan Bures, Samuel Filgueiras Rodrigues, Joao Rodrigues de Barros Neto, Luiz Henrique Martinez Antunes, Mohammad Masoumi, Hamilton Ferreira Gomes de Abreu, Miloslav Beres
Summary: In this study, Co-Cr-Mo alloy was used to fabricate metallic implants for artificial joints. The material's mechanical response and microstructural changes under cyclic loading were investigated. Results showed that cyclic loading led to phase transformation and crack nucleation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
F. D. V. Araujo, F. W. N. Silva, T. Zhang, C. Zhou, Zhong Lin, Nestor Perea-Lopez, Samuel F. Rodrigues, Mauricio Terrones, Antonio Gomes Souza Filho, R. S. Alencar, Bartolomeu C. Viana
Summary: In this study, the behavior of monolayer WS2 on a drilled Si3N4 substrate was investigated through Raman spectroscopy and photoluminescence measurements. It was found that the Si3N4 substrate affects the optical properties of monolayer WS2. Density functional theory and quantum molecular dynamics simulations showed that strain and charge transfer mechanism are important factors for the decrease in photoluminescence.
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)
