Article
Acoustics
Alan C. Kubrusly, Pedro Tovar, Jean Pierre von der Weid, Steve Dixon
Summary: This study investigates the influence of thickness discontinuities on shear horizontal ultrasonic guided waves, revealing that geometrically symmetric but with opposite boundary conditions can act as a symmetry inverter discontinuity. Unlike fully symmetric discontinuities, the effectiveness of a symmetry inverter discontinuity depends on the frequency.
Article
Chemistry, Multidisciplinary
Alex Vu, Leonard J. Bond, Sunil K. Chakrapani
Summary: This study numerically investigates the mode conversion between fundamental Lamb and Rayleigh waves in quarter and half spaces. Using finite element analysis, the propagation of fundamental Lamb waves in a plate attached to a quarter space and the subsequent mode conversion to Rayleigh waves are studied. B-Scans show beat-like phenomenon for the R -> L conversion and generation length for the L -> R conversion. The study confirms that grazing incidence of bulk waves and scattering/diffraction play important roles in the mode conversion phenomenon.
APPLIED SCIENCES-BASEL
(2023)
Article
Acoustics
Alan C. Kubrusly, Steve Dixon
Summary: The interaction of guided waves with wall thinning is complex, influenced by thinning geometry and frequency. By combining elastodynamics reciprocity theorem and theory of multiple reflections, this study analytically calculates SH wavefield scattering in plates due to interaction with arbitrary tapered thinning. The research reveals the importance of taper shape in mode conversion and reflection behavior.
Article
Chemistry, Multidisciplinary
Xinyue Yu, Suna Zhuang, Jianfeng Chen, Zhi-Yuan Li, Wenyao Liang
Summary: The transmission properties of odd/even one-way modes and their reversible conversion in a double-channel waveguide were studied. It was found that the M4 mode supports dispersionless slow-light propagation and the other three modes have strong robustness against defects.
Article
Physics, Applied
Ye Jeong Shin, Hong Min Seung, Joo Hwan Oh
Summary: What makes elastic waves different from other waves is the existence of various wave modes and coupling between these modes. In this study, fluid-like elastic metasurfaces were proposed to perfectly eliminate mode coupling. Strip-type unit cells were used to design and realize elastic metasurfaces mimicking acoustic hard-wall and soft-wall. Numerical analysis and experiments were conducted to prove the validity of the designed unit cells. This study presents a more versatile metasurface by solving the mode coupling of solid elastic waves, and the designed fluid-like metasurfaces can be further utilized in studies considering the opposite phase shift characteristic.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Alessandro Del Ponte, Peter DeScioli, Aidas Masiliunas, Noah Lim
Summary: Experimental economics research indicates that challenges arise in cooperation among countries due to one-way migration and wealth disparities in migrant crises. Leaders are more likely to provide shelter under certain conditions, such as when the first country in the migration route can return migrants to the starting country.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Mingwang Zhao, Zhigang Cai, Lihao Song, Yuanquan Shi, Min Huang
Summary: This paper introduces an adaptive one-way SLC/TLC mode conversion to balance the capacity and I/O performance in high density TLC SSDs. By initializing all SSD cells in SLC-mode and converting certain cells to TLC mode when available capacity is lower than application demand, it aims to increase available space in SSDs. A mathematical model is proposed to guide the conversions from SLC mode to TLC mode.
IEICE ELECTRONICS EXPRESS
(2021)
Article
Education, Scientific Disciplines
Ductho Le, Yen Nguyen, Hoang Ngoc Quy, Lawrence H. Le, Haidang Phan
Summary: In this study, theoretical models of elastodynamics for an orthotropic half-space coated by a thin orthotropic layer were proposed. The theoretical predictions, compared with numerical results, offer valuable applications in seismology and materials characterization of coated structures.
Article
Physics, Applied
Xiao-Yu Yao, Hamad Ali, Fu-Li Li, Peng-Bo Li
Summary: In this study, it is demonstrated that the shift of resonance frequencies of propagating phonons induced by spin-orbit interactions can achieve nonreciprocal phonon blockade and various phonon phenomena. The use of a two-level system to induce self-interactions of phonons in the cavity offers a potential approach for designing nonreciprocal phonon routing.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Mahmoud A. A. Abouelatta, Mohamed A. Swillam, Artur R. Davoyan, Ahmed M. Mahmoud
Summary: The unidirectional flow of electrons in a conventional electronic diode has been crucial in electronics development. Achieving the same one-way flow for light has been a challenge, but a novel approach using time-dependent optical transitions in a nanoplasmonic waveguide has been proposed in this study. This configuration allows for strict one-way flow of light, with full reflection in one direction and undisturbed transmission in the other. This concept has potential applications in communications, smart windows, thermal radiation management, and solar energy harvesting.
Article
Optics
Mahmoud A. A. Abouelatta, Mohamed A. Willam, Artur R. Davoyan, Ahmed M. Mahmoud
Summary: The unidirectional flow of electrons in a conventional electronic diode has played a crucial role in the development of electronics. However, achieving a one-way flow of light has been a long-standing problem. This study presents a novel approach to break reciprocity and achieve a unidirectional flow of light using a nanoplasmonic waveguide as an example. By combining time-dependent interband optical transitions, a strict one-way light transmission can be achieved in systems with a backward wave flow. This concept has various applications in communication, smart windows, thermal radiation management, and solar energy harvesting.
Article
Mechanics
S. D. Winn, A. F. Sarmiento, N. Alferez, E. Touber
Summary: The post-explosion events of the Hunga Tonga-Hunga Ha'apai volcano in January 15, 2022 highlighted the need for a better understanding of ocean-atmosphere interactions under large energy injections. A two-way coupled system was derived to describe the long-wave behavior of the ocean and atmosphere, taking into account bathymetry, topography, and atmospheric non-uniformities. Linear analysis explained the observed phenomena during the Tonga event, while a continuous transcritical regime and refractive properties were identified as key factors for wave generation and energy transfer. Global simulations demonstrated the worldwide effect of the atmospheric wave and emphasized the importance of the two-way coupled model for daylong predictions. The proposed framework can be extended to include additional layers and physics to improve warning systems, and the code for simulating the event is made available.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Mechanical
Zhu-Long Xu, Dan-Feng Wang, Tomohiro Tachi, Kuo-Chih Chuang
Summary: Wave mode conversion has been studied using a Kresling origami wave-mode converter that transforms longitudinal waves into torsional waves. Experimental verification shows potential applications in wave manipulation and energy distribution.
EXTREME MECHANICS LETTERS
(2022)
Article
Physics, Applied
David E. Fernandes, Mario G. Silveirinha
Summary: This study examines the impact of time-reversal symmetry on the dynamic response of nonlinear optical systems that exhibit one-way behavior. It is discovered that nonreciprocal lossless nonlinear materials are typically time-reversal invariant, which raises a paradox since time-reversal invariant systems should be bidirectional. A solution to this conundrum is presented, explaining the compatibility of one-way behavior with time-reversal invariance. It is found that the adiabatic approximation fails to predict the bidirectional nature of nonlinear systems due to the variation in time of incident waves in the time-reversed problem.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Christopher J. Sarabalis, Raphael Van Laer, Rishi N. Patel, Yanni D. Dahmani, Wentao Jiang, Felix M. Mayor, Amir H. Safavi-Naeini
Summary: Acousto-optic modulators have long been important tools for controlling light since the advent of lasers. Recent advances in on-chip lithium niobate waveguide technology have opened up new opportunities for these devices. Demonstrating a collinear acousto-optic modulator in a suspended film of lithium niobate with a high-confinement, wavelength-scale waveguide significantly improves the modulator's efficiency.
Article
Acoustics
Qian Wu, Yangyang Chen, Guoliang Huang
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2019)
Article
Physics, Applied
Qian Wu, Hui Chen, Xiaopeng Li, Guoliang Huang
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Applied
Huy Nguyen, Qian Wu, Xianchen Xu, Hui Chen, Sharon Tracy, Guoliang Huang
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Multidisciplinary
Xianchen Xu, Qian Wu, Hui Chen, Hussein Nassar, Yangyang Chen, Andrew Norris, Guoliang Huang, Michael R. HabermanO
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Applied
Huy Nguyen, Qian Wu, Jiaji Chen, Yukai Yu, Hui Chen, Sharon Tracy, Guoliang Huang
Summary: This study presents a large-scale acoustic panel made of double-layer membrane-type metamaterials for broadband noise reduction, which shows excellent transmission loss within a wide frequency range. The design and theoretical model proposed could be an efficient tool for designing acoustic metamaterial-based panels and soundproof walls with high noise reduction in low/middle frequency regions.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
H. Q. Nguyen, Q. Wu, H. Chen, J. J. Chen, Y. K. Yu, S. Tracy, G. L. Huang
Summary: An ultra-broadband acoustic barrier assembled from space-coiling metamaterials supporting two Fano resonances is reported, with additional thin viscous foam layers for acoustic hyper-damping. Experimental results show over 10 dB reduction in noise transmission loss across a specific range, along with unconventional broadband absorption observed in the dampened barrier.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Multidisciplinary Sciences
Hui Chen, Hongkuan Zhang, Qian Wu, Yu Huang, Huy Nguyen, Emil Prodan, Xiaoming Zhou, Guoliang Huang
Summary: The authors demonstrate 1D and 2D dynamic topological pumping in acoustic crystals with cavity arrays strongly coupled through modulated channels, showing the robustness of higher-order topological sound transport against geometrical imperfections.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xianchen Xu, Qian Wu, Yaokun Pang, Yuteng Cao, Yuhui Fang, Guoliang Huang, Changyong Cao
Summary: A novel multifunctional metamaterial (MFM) based on triboelectric nanogenerators (TENGs) capable of energy harvesting and vibration control is reported. The MFM can effectively power electronics and suppress low-frequency mechanical vibration. This work provides a new design and model for developing advanced smart systems used in various applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Mechanics
Qian Wu, Guoliang Huang
Summary: This study proposes the use of two-dimensional isotropic polar media to achieve omnidirectional wave polarization manipulation. By utilizing polarity and chirality moduli, nearly perfect wave mode conversion and omnidirectional anomalous wave polarization are achieved. Several examples of the anomalous wave polarization, including singly polarized transmission and anomalous wave refraction, are presented. The direction-independent nature of these behaviors sets them apart from those observed in anisotropic systems.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Physics, Multidisciplinary
Qian Wu, Xiaodong Zhang, P. Shivashankar, Yangyang Chen, Guoliang Huang
Summary: This paper introduces a linear active metalayer that can convert the wave frequency of a flexural incidence into arbitrary frequencies of transmitted waves. The active element, involving piezoelectric components and time-modulated transfer function, breaks energy conservation and allows for linear and independent frequency conversion. Phase-gradient and frequency-gradient metalayers are proposed for wave steering and dynamic beam steering, respectively, using time-modulated units.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Weijian Zhou, Shuoyuan Wang, Qian Wu, Xianchen Xu, Xinjing Huang, Guoliang Huang, Yang Liu, Zheng Fan
Summary: Elastic metasurfaces have the potential to manipulate mechanical wavefronts with their ultra-thin geometry. Conventional design methods rely heavily on numerical and trial-and-error approaches, which can be computationally expensive and challenging for multi-functional metasurfaces. This paper introduces a machine learning network that can extract the complex relation between geometrical parameters and dynamic properties of the metasurface unit, enabling faster design.
MATERIALS & DESIGN
(2023)
Article
Multidisciplinary Sciences
Qian Wu, Xianchen Xu, Honghua Qian, Shaoyun Wang, Rui Zhu, Zheng Yan, Hongbin Ma, Yangyang Chen, Guoliang Huang
Summary: A class of active metamaterial with odd mass density tensor is presented, where the asymmetric part of the density arises from active and nonconservative forces. The odd mass density is realized using metamaterials with inner resonators connected by asymmetric and programmable control. Experimental validation shows that the odd mass in active solids leads to wave anisotropy and directional wave energy gain.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
Shuhong Yang, Yun Ling, Qian Wu, Hanwen Zhang, Zheng Yan, Guoliang Huang, Jian Lin, Caixia Wan
Summary: This study explores lignin as a precursor for the synthesis of laser induced graphene (LIG) and fabricates ultrasensitive strain sensors. The resulting LIG shows high sensitivity to small deformations caused by human body motions and vibrations, with a wide working range and high stability. The lignin-derived LIG can be used for monitoring human body motions and sound-related applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Proceedings Paper
Energy & Fuels
Qian Wu, Yunhui Li, Yongqiang Chen, Yong Sun, Kai Fang, Yewen Zhang, Hong Chen, Zhi Ning Chen
2018 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL ELECTRONICS FOR SUSTAINABLE ENERGY SYSTEMS (IESES)
(2018)
Article
Materials Science, Multidisciplinary
Yanzheng Wang, Qian Wu, Yiran Tian, Guoliang Huang
Summary: This paper proposes the microstructure design of an odd plate and investigates the directional wave energy amplification and the presence of interface waves in odd plates through theoretical and numerical analysis. The research findings contribute to the understanding of elastic behavior in 2D non-Hermitian systems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
F. Greco, D. Codony, H. Mohammadi, S. Fernandez-Mendez, I. Arias
Summary: This study overcomes the difficulty of harnessing the flexoelectric effect by designing multiscale metamaterials. Through topology optimization calculations, we obtain optimal structures for various apparent piezoelectric properties and find that low-area-fraction lattices are the preferred choice. The results show competitive estimations of apparent piezoelectricity compared to reference materials such as quartz and PZT ceramics.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoxuan Zhang, Tryaksh Gupta, Zhenlin Wang, Amalie Trewartha, Abraham Anapolsky, Krishna Garikipati
Summary: This study presents a computational framework for coupled electro-chemo-(nonlinear) mechanics at the particle scale in solid-state batteries, including interfacial fracture, degradation in charge transfer, and stress-dependent kinetics. The discontinuous finite element method allows for arbitrary particle shapes and geometries.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Chengguan Zhang, Xavier Balandraud, Yongjun He
Summary: The coexistence of both austenite and martensite is a common characteristic in Shape Memory Alloys (SMAs). The multiple-domain microstructures, consisting of austenite, martensite twins, and individual martensite variants, evolve collectively during the phase transformation, affecting the material's macroscopic response. This paper presents an experimentally observed interface consisting of five domains in a Ni-Mn-Ga single-crystal, and analyzes the effects of thermal loading path and material initial state on the domain pattern formation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Shaobao Liu, Haiqian Yang, Guang-Kui Xu, Jingbo Wu, Ru Tao, Meng Wang, Rongyan He, Yulong Han, Guy M. Genin, Tian Jian Lu, Feng Xu
Summary: The balance between stress and adhesion plays a crucial role in governing the behaviors of adherent cells, such as cell migration. In certain microenvironments, such as tumor, variations in hydrostatic pressure can significantly impact cell volume and adhesion, which in turn affects cell behavior.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xun Xiong, Qinglei Zeng, Yonghuan Wang, Ying Li
Summary: In this work, the authors investigate the possibility of enhancing the resistance to crack growth in brittle materials through microstructure design. They establish a computational framework to simulate crack propagation and characterize fracture energy. The effects of different types of voids on toughening mechanisms are explored, and the critical conditions for embrittlement-toughening transition are identified. The study also discusses the difference between void toughening in brittle and ductile materials, and extends the toughening strategy to nacre-like materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Huan Wang, Yong-Quan Liu, Jiu-Tao Hang, Guang-Kui Xu, Xi-Qiao Feng
Summary: This study establishes a cytoarchitectural model to accurately capture the buckling and postbuckling behaviors of epithelia under fast compression. The stress evolution of epithelia is divided into three stages: loading, phase transition, and stress recovery. The postbuckling process is governed by the active tension generated by the actomyosin network. The study also proposes a minimal model that predicts the flattening time and stress recovery extent as functions of applied strain or strain rate, in agreement with simulations and experiments.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Lei Liu, Hao Liu, Yuming He, Dabiao Liu
Summary: This study investigates the mechanics and topologically complex morphologies of twisted rubber filaments using a combination of experiment and finite strain theory. A finite strain theory for hyperelastic filaments under combined tension, bending, and torsion has been established, and an experimental and theoretical morphological phase diagram has been constructed. The results accurately determine the configuration and critical points of phase transitions, and the theoretical predictions agree closely with the measurements.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Abhishek Painuly, Kunnath Ranjith, Avinash Gupta
Summary: This paper analyzes the interfacial waves caused by frictional slipping and studies their dispersion relation and wave modes. By studying the slip waves in a geophysical model, the surface wave dispersion phenomenon is explored, and an alternative explanation is proposed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Houlin Xu, Joshua Vievering, Hoang T. Nguyen, Yupeng Zhang, Jia-Liang Le, Zdenek P. Bazant
Summary: Motivated by the extraordinary strength of nacre, this study investigated the probabilistic distribution of fishnet strength using Monte Carlo simulations and found that previous analytical solutions are not applicable for fishnets with a large number of links. By approximating large-scale fishnets as a continuum with cracks or holes, the study revealed that the strength distribution follows the Weibull distribution. This new model has significance for optimizing the strength-weight ratio in printed material structures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Souhayl Sadik, Arash Yavari
Summary: This paper revisits the mathematical foundations of nonlinear viscoelasticity and studies the geometry of viscoelastic deformations. It discusses the decomposition of the deformation gradient into elastic and viscous distortions and concludes that the viscous distortion can only be a two-point tensor. The governing equations of nonlinear viscoelasticity are derived and the constitutive and kinetic equations for various types of viscoelastic solids are discussed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Wen Cheng, Hongkuan Zhang, Yu Wei, Kun Wang, Gengkai Hu
Summary: In this study, we propose a phenomenon similar to Thouless pumping for a continuous in-plane elastic system, enabling topological transport of elastic waves through spatial modulation of material elasticity. By incorporating specific lattice microstructures, termed pentamode materials, precise and robust control over elastic wave propagation is achieved.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Linda Werneck, Mertcan Han, Erdost Yildiz, Marc-Andre Keip, Metin Sitti, Michael Ortiz
Summary: We have developed a simple model that describes the ionic current through neuronal membranes by considering the membrane potential and extracellular ion concentration. The model combines a simplified Poisson-Nernst-Planck model of ion transport through individual ion channels with channel activation functions calibrated from experimental data. The calibrated model accounts for the transport of calcium, sodium, potassium, and chloride and shows remarkable agreement with experimentally measured current-voltage curves for human neural cells.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)