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Article
Engineering, Mechanical
Xu Chen et al.
Summary: Acoustic black holes (ABHs) have attracted increasing attention in the field of vibration suppression, sound radiation control and energy harvesting. However, they are unable to be triggered at low frequencies. By combining an ABH beam with a negative stiffness element, a novel method to enhance vibration reduction at low frequencies is proposed. The results show that the proposed NS-ABH beam can achieve remarkable vibration reduction below the cut-on frequency without sacrificing the ABH effect at higher frequency.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Kuan Liang et al.
Summary: This study proposes a systematic inverse design framework for constructing multistable mechanical metamaterials with programmable gradients. The tailored bistable cells with precisely controlled maximum instability forces were designed through topology optimization. The simulation and experimental results showed the feasibility of the design method, successfully producing mechanical metamaterial structures with different functions.
MATERIALS & DESIGN
(2023)
Article
Engineering, Mechanical
Nanfang Ma et al.
Summary: A novel hierarchical re-entrant honeycomb structure named square re-entrant honeycomb (SRH) is proposed, which combines square unit cells with the re-entrant honeycomb (RH). The SRH demonstrates improved energy absorption capacity and vibration insulation compared to traditional RH structures. The dynamic crushing behavior of SRH structures is investigated theoretically and numerically, showing higher plateau stress and specific energy absorption (SEA) than RH. Additionally, the introduction of square unit cells expands the band gap and improves vibration isolation capability.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Zeeshan Alam et al.
Summary: This study investigates the nonlinear deformation and small-amplitude longitudinal elastic wave band gap characteristics of an infinite periodic hard-magnetic soft material laminate under applied magnetic flux density. The results show that the width and position of the band gaps can be changed by varying the magnetic field intensity, and the material properties and volume fractions of the laminate also play significant roles in the generation of band gaps. These findings provide guidelines for designing futuristic remotely and actively controlled wave-manipulating devices.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Tayaallen Ramachandran et al.
Summary: This study focuses on a multi-layered symmetric metamaterial design for C- and X-band applications. The proposed design achieved the miniaturisation concept by arranging unit cells in a multi-layer structure, and exhibited unique properties such as a highly effective medium ratio and left-handed characteristics. Simulation analyses and parametric studies were performed to validate the performance of the design.
Article
Mechanics
Atul Kumar Sharma et al.
Summary: Dielectric elastomers are active materials that change modulus under electric fields. Current research focuses on improving the performance of adaptive phononic crystals by utilizing a gradient-based optimization method to maximize band gap width. This new method outperforms traditional metaheuristics-based topology optimization in terms of wider prohibited frequency bands and reduced computational cost.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Hai-Tao Liu et al.
Summary: The study focused on the mechanical properties of three-dimensional enhanced star-shaped honeycombs (3D-ESSH), showing improved negative Poisson's ratio effect and effective Young's modulus compared to 3D-SSH. Adding reinforcing rods in the loading direction can significantly enhance the effective mechanical performance of the structure. Additionally, investigating the impact of reinforcing rods on the effective thermal expansion coefficient of 3D-ESSH reveals the potential for negative thermal expansion in the corresponding direction when combined with proper bi-materials.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Xue Gang Zhang et al.
Summary: This paper investigates a new method to enhance the mechanical properties of auxetic composites by designing joints of frames. Through experiments and numerical analysis, optimizing the design of joints can improve energy absorption capacity and auxetic behavior.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Hui Chen Luo et al.
Summary: Filling slow recovery foam into re-entrant honeycombs can prevent lateral buckling, increase stiffness and energy absorption capacity, showing promising potential in protective engineering.
COMPOSITE STRUCTURES
(2022)
Article
Mathematics, Applied
Hongjie LI et al.
Summary: Motivated by Minnaert resonance in acoustics, this paper investigates low-frequency resonance of acoustic bubbles embedded in soft elastic materials. By balancing the acoustic and elastic parameters as well as the bubble geometry, the potential of using bubbly elastic media to achieve negative elastic materials is demonstrated.
SIAM JOURNAL ON APPLIED MATHEMATICS
(2022)
Article
Mechanics
Qiang Gao et al.
Summary: This paper presents an analytical framework to predict the in-plane mechanical properties and proposes a modification coefficient to revise the analytical model. A finite element code is developed to validate the revised model. The results show that the irregularity has a significant effect on the effective Young's modulus but a minor effect on the Poisson's ratio.
COMPOSITE STRUCTURES
(2022)
Review
Physics, Applied
Lei Zhu et al.
Summary: This article reviews the current research progress on EIT metamaterials, including the theoretical models for analyzing EIT metamaterials, the design and experiments of passive and active EIT metamaterials, and the applications of EIT metamaterials in the areas of slow lights, sensings, absorptions, and others.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Mohammadreza Moeini et al.
Summary: This paper presents a verification and validation analysis of Finite Element (FE) models predicting the mechanical response of linearly elastic honeycomb structures. The numerical homogenization models can predict the apparent in-plane stiffness in structures made of 37 cells within 4%, while the discrepancy increases to 70% when 13 cells are considered.
MECHANICS OF MATERIALS
(2022)
Article
Mechanics
Zeeshan Alam et al.
Summary: Active tuning of elastic wave band gaps has received significant attention recently. Soft dielectric elastomers (DEs) have shown great promise due to their ability to undergo large reversible deformations and deformation-dependent constitutive properties. In this study, we investigate the longitudinal wave band gaps of an infinite periodic soft functionally graded dielectric elastomer under electro-mechanical biasing fields. The material properties of the functionally graded DE are described by a power law, and the nonlinear hyperelastic compressible neo-Hookean model is used to characterize the constitutive behavior. The band structure of the soft functionally graded DE structure is determined using the finite element method with Bloch-Floquet theory. A parametric study reveals the influence of biasing fields and power law exponent on the band gap characteristics. The findings reported here have potential applications in the design of soft DE wave devices with tunable band structures.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Engineering, Civil
Linwei Zhang et al.
Summary: This study investigates the vibration isolation characteristics and crushing behaviors of novel hierarchical mechanical metamaterials. Numerical analyses are conducted for different hierarchical configurations of mechanical metamaterials. The study finds that the hierarchical configuration has the potential to broaden the band gap and improve energy-absorbing efficiency. The best performing configuration (S3) for vibration isolation and energy absorption is determined. Further analysis of S3's structural parameters is performed to understand their impact on band gap characteristics and crushing performance. Multi-objective optimization is employed to find optimal structural parameters for enhancing the gap-midgap ratio and the specific energy absorption. This study provides effective guidance for designing mechanical metamaterials with excellent vibration isolation capacity and energy absorption efficiency.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Mechanical
Qing Li et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Multidisciplinary
Baocai Chen et al.
Summary: This paper presents a novel multifunctional NS mechanical metamaterial structure that possesses both multi-stable and compressive mono-stable states without the need for adjusting geometrical parameters. The mechanical performance of this structure under axial compression and the key factors influencing stable state were experimentally and numerically investigated. Effective methods to ensure multi-stability of the tri-layer metamaterial structure after unloading from a completely compacted state were proposed.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Xinwei Li et al.
Summary: The advancement of 3D printing technology has led to the development of microlattice metamaterials with excellent sound and mechanical energy absorption capabilities. High sound absorption coefficients and specific energy absorption have been measured, with absorption mechanisms and limitations being proposed.
Review
Engineering, Civil
Chen Luo et al.
Summary: This paper extensively reviews the design methods, advanced manufacturing technologies, mechanical properties, and potential applications of auxetic tubular structures. Furthermore, it discusses the challenges and opportunities in this field to inspire future research work.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Aerospace
Yongguang Guo et al.
AEROSPACE SCIENCE AND TECHNOLOGY
(2020)
Review
Mechanics
Yan-Feng Wang et al.
APPLIED MECHANICS REVIEWS
(2020)
Article
Materials Science, Multidisciplinary
Xin-chun Zhang et al.
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Engineering, Mechanical
Xiaojun Tan et al.
EXTREME MECHANICS LETTERS
(2020)
Article
Mechanics
Huabin Yu et al.
COMPOSITE STRUCTURES
(2019)
Article
Mechanics
Xiaojun Tan et al.
COMPOSITE STRUCTURES
(2019)
Article
Engineering, Mechanical
Xiang Li et al.
EXTREME MECHANICS LETTERS
(2019)
Article
Acoustics
Marco Moscatelli et al.
JOURNAL OF SOUND AND VIBRATION
(2019)
Article
Physics, Applied
Nitish Kumar et al.
APPLIED PHYSICS LETTERS
(2019)
Article
Mechanics
H. L. Tan et al.
COMPOSITE STRUCTURES
(2019)
Review
Nanoscience & Nanotechnology
Xinxiang Niu et al.
Article
Engineering, Electrical & Electronic
Farzad Khajeh-Khalili et al.
Article
Instruments & Instrumentation
Luke Mizzi et al.
SMART MATERIALS AND STRUCTURES
(2018)
Article
Engineering, Civil
Liming Chen et al.
THIN-WALLED STRUCTURES
(2018)
Article
Nanoscience & Nanotechnology
Zhongxin Zhou et al.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2017)
Article
Instruments & Instrumentation
Sushovan Mukherjee et al.
SMART MATERIALS AND STRUCTURES
(2016)
Article
Instruments & Instrumentation
J. Meng et al.
SMART MATERIALS AND STRUCTURES
(2015)
Article
Physics, Condensed Matter
Ruben Gatt et al.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2013)
Article
Acoustics
Alessandro Spadoni et al.
Article
Materials Science, Multidisciplinary
A. Spadoni et al.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2006)
