Article
Engineering, Mechanical
Zhao Zhao, Xinbo Cui, Yafei Yin, Yuhang Li, Min Li
Summary: This research presents a novel design for a periodic metamaterial plate using homogenous smart material, and verifies its transmitting and prohibiting effect in wave propagation through experiments. The power density and configuration of the heat source can significantly tune the vibration band gaps in frequency and bandwidth, indicating a wide range of potential applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Xi-Ning Zhao, Xiao-Dong Yang, Wei Zhang, Huayan Pu
Summary: By introducing a negative proportional feedback control strategy in a piezoelectric metamaterial beam, this paper successfully controls the vibration and wave propagation properties. The natural frequencies and bandgaps of the system can be significantly altered by adjusting the feedback control gain ratio, length ratio, and number of unit cells.
Article
Materials Science, Multidisciplinary
Soroush Sepehri, Mahmoud Mosavi Mashhadi, Mir Masoud Seyyed Fakhrabadi
Summary: This paper investigates the phononic crystal properties of microbeams made of functionally graded materials, achieving tunable wave attenuation through the periodic arrangement of auxiliary piezoelectric springs. The results demonstrate that wave attenuation can be controlled in different frequency ranges by implementing functionally graded materials and combining it with piezoelectricity.
MECHANICS OF MATERIALS
(2022)
Article
Mechanics
Panagiotis I. Koutsianitis, Georgios K. Tairidis, Georgios E. Stavroulakis
Summary: This paper investigates band gaps on star-shaped auxetic microstructures equipped with shunted piezoelectric elements, finding optimal piezoelectric patch positions and calculating electrical parameter values using genetic algorithms to maximize specific band gaps. The proposed technique can be used to maximize band gaps at certain frequency ranges, including frequency bands not considered in mechanical microstructure optimization.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Crystallography
Jingxuan Zhou, Jie Zhang, Jiahui Chang, Zheng-Yang Li, Dongjia Yan
Summary: Phononic crystals and metamaterials possess topologically protected surface states, which can guide elastic waves without scattering or energy losses. In the field of acoustics, topological insulators show promise in designing efficient and robust acoustic wave guides. This study proposes a novel design of hexagonal metamaterial plates that can generate topologically protected edge waves through active control. The numerical examples demonstrate the robustness and efficiency of the proposed design.
Article
Materials Science, Multidisciplinary
Lili Yuan, Zhanhua Cai, Peng Zhao, Jianke Du, Tingfeng Ma, Ji Wang
Summary: This paper studies the flexural wave in a steel-concrete composite beam with periodically surface-bonded cement-based piezoelectric patches. The idea of phononic crystals is used to design the composite beam. The band gap of the beam can be regulated by connecting an external capacitor shunt circuit to the piezoelectric patches. The results show that the negative capacitance shunt circuit has a stronger regulation capability than the positive capacitance. This approach provides a promising way to design intelligent beams with tunable band gaps without modifying the structures.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Narayan Sharma, Prasant Kumar Swain, Dipak Kumar Maiti
Summary: In this study, the effect of damage on the free vibration and aeroelastic response of variable stiffness composite laminated plates was investigated. Anisotropic damage formulation was used to incorporate ineluctable defects into the finite-element coding, and MSC.Nastran coupled with Direct Matrix Abstraction Program was used to generate aerodynamic forces for aeroelastic analysis. The sensitive location of damage was identified, and the optimal placement of piezoelectric patches was determined to enhance the aeroelastic performance of damaged VS plates with active feedback control.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
N. S. Saravana Jothi, A. Hunt
Summary: Metamaterials are artificially structured materials with unique properties that do not exist in nature. Mechanical metamaterials aim to overcome limitations by embedding actuation into the unit elements, enabling control of material properties and mechanical states. This study proposes and investigates an active mechanical metamaterial concept that can actively control force and deformation distribution within its lattice.
Article
Materials Science, Multidisciplinary
Z. X. Xia, Y. Cong, S. T. Gu, Z. -Q. Feng
Summary: The present paper proposes a multi-parameter feedback control method combined with couple stress elasticity to model piezoelectric micro plate coupled systems. The methodology can design controllers for tuning vibration and wave propagation properties of micro scale plates based on coupled piezoelectric sensors and actuators.
MECHANICS OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yubin Zhang, Zao Yi, Xinyue Wang, Peixin Chu, Weitang Yao, Zigang Zhou, Shubo Cheng, Zhimin Liu, Pinghui Wu, Miao Pan, Yougen Yi
Summary: The study introduces a dual-frequency tunable ideal visible light metamaterial absorber that achieves perfect absorption in the visible light band with a 99.9% absorption rate, regardless of polarization angle and incident angle.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Acoustics
Tingfeng Ma, Yangyang Chen, Hui Chen, Yuanzhen Zheng, Guoliang Huang, Ji Wang, Jianke Du
Summary: This study improves the resistance-tuning characteristics of metamaterial beams by applying piezoelectric unit cells with a lateral electric field (LEF), resulting in better vibration attenuation properties. LEF resonators exhibit stronger piezoelectric coupling and can maintain better vibration attenuation properties when the bandgap width is broadened.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Chemistry, Physical
Tianrun Li, Zhemin Wang, Hanjie Xiao, Zhimiao Yan, Cheng Yang, Ting Tan
Summary: This study introduces a Helmholtz acoustic metamaterial (HAM) piezoelectric device with dual-band acoustic energy harvesting characteristics, which amplifies both structural and local resonances for improved energy conversion efficiency. Numerical simulations and experimental results demonstrate that the energy conversion efficiency of HAM is significantly higher than that of traditional acoustic metamaterials in both structural and local resonance bands.
Article
Engineering, Mechanical
Bin Yang, Kai Guo, Jie Sun
Summary: This paper introduces a novel approach to designing metamaterial rods with amplitude-dependent band gaps, utilizing resonators and horseshoe lattices for design flexibility and monolithic fabrication. Extensive case studies confirm the effectiveness of the proposed method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Gabriel Konda Rodrigues, Paolo Gardonio, Loris Dal Bo, Emanuele Turco
Summary: This paper presents experimental results on controlling stochastic flexural vibrations in a plate using five piezoelectric patches and a multi-resonant shunt. The study compares tuning methods based on minimizing flexural kinetic energy and maximizing electric power absorption, and investigates online tuning with an extremum seeking algorithm.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Qifa Lu, Chun-chuan Liu, Zhaohong Qin, Wensheng Ma, Feng-ming Li
Summary: A finite periodic structure consisting of active functionally graded (FG) metamaterial bars is proposed, and the width and location of band gaps for the periodic FG metamaterial structure can be tuned by adjusting the feedback control gain of the controller and designing the gradient index.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)