Article
Acoustics
Rong Zhao, Chunguang Li
Summary: New relationships are proposed to evaluate velocities in porous materials based on porosity-related bulk and shear moduli. The accuracy of the models is validated through fitting published data and sensitivity analysis, showing higher accuracy compared to existing empirical and theoretical equations. The models have good predictive performance for porous materials with critical porosity, but increased sensitivity should be noted in these cases.
Article
Acoustics
Kayc W. Lopes, Camila G. Gonsalez-Bueno, Daniel J. Inman, Douglas D. Bueno
Summary: This article presents an approach to investigate the effects of damage on longitudinal waves in thin plates with oblique incidence. The approach includes numerical simulations and experimental tests to demonstrate the improvement of damage detection and determination of damage depth by adjusting sensor size. The findings contribute to improving the current state of the art in wave propagation.
Article
Optics
Shunlin Huang, Peng Wang, Xiong Shen, Jun Liu, Ruxin Li
Summary: This paper theoretically and experimentally studies the diffraction behaviors of spatiotemporal optical vortex (STOV), revealing its unique diffraction patterns and rules compared to conventional light. It also provides an approach for fast detection of STOVs based on their special diffraction properties, with potential applications in STOV-based optical communications.
Review
Engineering, Civil
Mir Abbas Roudbari, Tahereh Doroudgar Jorshari, Chaofeng Lu, Reza Ansari, Abbas Z. Kouzani, Marco Amabili
Summary: Researchers have been debating the mechanical behavior of micro-/nano-structures recently, emphasizing the importance of size-dependent theories from the perspective of non-classical material behavior. The application of continuum mechanics models, rather than classical theories, in studying these small-scale structures can lead to more accurate analysis of their performance and behavior.
THIN-WALLED STRUCTURES
(2022)
Article
Acoustics
Mohammad Mosayyebi, Faramarz Ashenai Ghasemi, Reza Kolahchi
Summary: This paper discusses the wave propagation of a magnetorheological fluid micro sandwich plate with magnetostrictive face sheets embedded in the Kerr foundation. The carbon nanotubes in the face sheets are functionally graded along their thickness in various patterns. The properties of the magnetostrictive layer and the influence of small-scale parameter are considered. Analytical solutions are utilized to obtain the phase speed and frequencies of the system.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Fabien Treyssede, Matthieu Gallezot
Summary: This paper investigates the characteristics of high-frequency whispering-gallery modes in embedded elastic spheres using a specific finite-element method in spherical coordinates. The results highlight the behavior of leaky elastic whispering-gallery modes in the high-frequency regime, considering material loss and the properties of the external medium.
Article
Materials Science, Ceramics
Saeed Farahmand, Mohammad Hossein Soorgee, Asal Hosseini Monazzah
Summary: This study investigated the elastic properties of functionally graded materials through the use of ultrasonic bulk wave velocity features. The results showed a significant improvement in average elastic modulus with increasing sintering temperatures, as well as the presence of micro-voids and phase agglomeration in all samples.
CERAMICS INTERNATIONAL
(2021)
Article
Biology
Roberto De Filippo, Dietmar Schmitz
Summary: Hippocampal ripples are synchronous neural events critical for memory consolidation and retrieval. This study used a large dataset to analyze ripple propagation within the hippocampal formation and found that strong ripples propagate differently depending on their generation point along the hippocampal axis. The results suggest a distinctive role of the hippocampal septal pole in conditions of high-memory demand and highlight the impact of ripple generation location on neural activity across the hippocampus.
Article
Physics, Multidisciplinary
Hu Liu, Shujia Chen
Summary: This paper presents a theoretical framework for analyzing the dynamic behaviors of a DMBS made of FG materials, exploring the impact of FG material distribution and key factors on the system's performance.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mechanics
Mustafa Arda
Summary: Longitudinal wave propagation in carbon nanotubes is investigated using Rayleigh-Bishop rod model and nonlocal strain gradient elasticity theory in this study. The size dependent governing equation of motion is obtained through variational formulation. The proposed model is validated using lattice dynamics model considering neighborhood interaction. The calibration of scale parameters is significantly influenced by the number of atomic interactions, shear strain, and rotary inertia effects. The present results can contribute to the continuum modeling of carbon nanotubes with accurate scale parameters.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Construction & Building Technology
Muzamal Hussain
Summary: This study investigates the vibration characteristics of armchair and chiral single-walled carbon nanotubes under the impact of small-scale effect and with two boundary supports, using the nonlocal Flugge shell model. The wave propagation approach is used to determine the eigen frequencies for the tubes. It is found that increasing the nonlocal parameter reduces the corresponding fundamental frequency, and that the boundary conditions have a significant influence on the vibration of the carbon nanotubes with higher aspect ratios. The bending rigidity can be increased to increase the frequencies.
ADVANCES IN CONCRETE CONSTRUCTION
(2022)
Article
Acoustics
Rui Xu, Meaghan A. O'Reilly
Summary: Focused ultrasound treatments of the spinal cord can be facilitated by optimizing the relationship between density and sound speed, leading to improved simulation accuracy. By using CT data and linear functions, researchers were able to enhance the precision of modeling, paving the way for more accurate ultrasound beamforming in the spine.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Rui Xu, Meaghan A. O'Reilly
Summary: Focused ultrasound treatments of the spinal cord can be improved using a phased array transducer and beamforming to correct spine-induced focal aberrations. By utilizing simulations with CT data and optimizing lamina-specific parameters, the accuracy of time domain simulation can be maximized, enhancing trans-spine ultrasound beamforming.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Engineering, Manufacturing
Jinling Gao, Zherui Guo, Julio Andres Hernandez, Fengfeng Zhou, Yizhou Nie, Jian Gao, Boon Him Lim, Nesredin Kedir, Xuedong Zhai, Junyu Wang, Jung-Ting Tsai, Francesco De Carlo, Pavel D. Shevchenko, Tyler N. Tallman, Martin Byung-Guk Jun, Giuseppe R. Palmese, Weinong Chen
Summary: This study investigated the interactions between plies and tows in fiber-reinforced composite structures during transverse impact, using a variety of characterization techniques and high-speed imaging. Different failure modes were observed in S-Glass FRC and Kevlar FRC strips during impact, with damage extent increasing with impact velocity within the critical velocity region. Critical velocities of various components were compared to provide insights for designing impact-resistant fabrics and composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Tao Feng, Panshuo Wang, Zhijia Han, Liang Zhou, Wenqing Zhang, Qihang Liu, Weishu Liu
Summary: This study reports the large transverse and longitudinal magneto-thermoelectric effects in Mg3Bi2, a type-II nodal-line semimetal. The sample exhibits high magnetoresistance and the underlying mechanism is studied using density functional calculations.
ADVANCED MATERIALS
(2022)
