Article
Chemistry, Multidisciplinary
Lijun Chen, Chaoyu Chen, Long Jin, Hengyu Guo, Aurelia Chi Wang, Fanggang Ning, Qiaoli Xu, Zhaoqun Du, Fumei Wang, Zhong Lin Wang
Summary: By designing and fabricating negative Poisson's ratio yarn as the foundation structure of intelligent devices, it can be utilized to create various flexible textile-based electronic devices, such as energy harvesting fabric, self-counting yoga elastic bands, and self-powered pre-alarm cables. Moreover, the NPRY-TENGs with different structures and parameters were systematically studied to optimize the output performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Mechanics
Huan Lu, Xiaopeng Wang, Tianning Chen
Summary: A novel hierarchical negative Poisson's ratio (NPR) structure called rotating star-circle structure (RSCS) was proposed and validated through quasi-static experiments and FE analysis. The RSCS exhibited three-step deformation and three plateau stages, and its deformation mechanisms were revealed based on the deformation modes and mechanical responses. Parameter studies showed that the geometric configuration significantly affected the deformation modes and mechanical responses. Compared with other auextic structures in the SEA, the RSCS exhibited better energy absorption. Lastly, a general design method based on equal chord division was proposed for constructing multi-plateau structures.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Textiles
Hasan Kamrul, Adeel Zulifqar, Yadie Yang, Shuaiquan Zhao, Minglonghai Zhang, Hong Hu
Summary: This study conducted a geometrical analysis of auxetic woven fabrics based on foldable geometry and established a relationship between Poisson's ratio and tensile strain. Semi-empirical equations were used to predict the auxetic behavior of fabrics with different geometrical parameters, which were validated by experimental results showing excellent agreement.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Acoustics
Linyan Shi, Sihan Wang, Nanyue Liang, Xinyu Zhang, Lizhong Niu, Deshan Cheng, Xiaoning Tang
Summary: This work presents an experimental study on the sound absorption properties of crochet fabrics, investigating the effects of multi-layer structures and plied yarns. The results show that both multi-layer structures and plied yarns significantly influence the sound absorption efficiency, indicating the potential applications of crochet fabrics in noise reduction and control in interior decorations.
Article
Mechanics
Jie Li, Zheng-Yan Zhang, Hai-Tao Liu, Yan-Bing Wang
Summary: This paper proposes a strategy of bi-directional auxetic metamaterials with tunable effective Poisson's ratio and investigates the deformation mechanisms through numerical simulations and experiments. The results demonstrate that the relative specific stiffness and effective Poisson's ratios depend on geometrical parameters and configuration. The study systematically characterizes the deformation mechanism of the innovatively designed structures and expands the potential applications of metamaterials in various fields.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Y. Yao, Y. Ni, L. H. He
Summary: The study explores the origin of negative Poisson's ratio in rutile-type oxides and fluorides through density functional theory (DFT) simulation, highlighting the dominant role of nearest-neighbor central force interactions. A new three-dimensional mechanical metamaterial is designed by mimicking the bond structure via elastic beams. The analytical expressions for the effective Poisson's ratio and compressibility are derived and validated by finite element computations, indicating the material can exhibit negative Poisson's ratio and negative linear, area, or volume compressibility simultaneously.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Textiles
Tehseen Ullah, Sheraz Ahmad, Yasir Nawab
Summary: This study investigates the negative Poisson ratio property of Auxetic materials and develops helical Auxetic yarn through experimental methods. The results show that the thickness and diameter of the core filament have a direct relationship with Auxeticity, while the linear density of the wrap filament is inversely proportional to Auxeticity. The wrap angle has an inverse effect on Auxeticity.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Multidisciplinary
Jianbang Shen, Jingran Ge, Junhua Xiao, Jun Liang
Summary: In this study, a honeycomb structure with curved reentrant sides and negative Poisson's ratio (NPR) was designed, and the impact dynamics behaviors were investigated using finite element method. The study found that the Poisson's ratio and energy absorption capacity of the honeycomb structure varied with the arc angle and compression velocity.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Civil
Huan Lu, Xiaopeng Wang, Tianning Chen
Summary: This paper investigates the deformation modes and energy absorption capacity of a combined auxetic honeycomb structure under different impact velocities. The results show that the structure presents better energy absorption compared with conventional honeycomb structures while retaining the negative Poisson's ratio property.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Haoyu Li, Weiming Zhang
Summary: This paper proposes a novel design concept of PCF with NPR air holes composite structure, which effectively suppresses fiber deformation caused by external loads and reduces additional confinement loss. The concept also demonstrates structural diversity, offering support for flexible core layer design of PCF under different application requirements.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Ziyang Qu, Meiling Xu, Shuyi Lin, Yiwei Liang, Xuanhao Yuan, Feilong Wang, Jian Hao, Yinwei Li
Summary: In this study, a two-dimensional material called Si2S with a negative Poisson's ratio was predicted using first-principles methods. The Si2S monolayer has a puckered lattice structure and exhibits negative Poisson's ratios along both x and y directions. It also shows semiconductor properties and a high absorption coefficient for visible light, as well as good oxidation resistance. These versatile properties make Si2S a promising material for nanodevices.
Article
Engineering, Environmental
Yonghui Yan, Jing Yan, Xin Gong, Xiaowan Tang, Xueya Xu, Ting Meng, Fan Bu, Dongming Cai, Zhenyuan Zhang, Guangdi Nie, Haifeng Zhang
Summary: In this study, a self-supporting electrode with a Negative Poisson's Ratio (NPR) structure was fabricated using electrospinning and laser direct writing technology, overcoming the limitations of traditional carbon-based materials and the integration problem of rigid electrodes and soft substrates. Furthermore, a quasi solid-state asymmetric micro-supercapacitor with a NPR structure was assembled, achieving a higher area energy density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Materials Science, Multidisciplinary
Xin Xue, Congcong Lin, Fang Wu, Zeyu Li, Juan Liao
Summary: Metamaterials with negative Poisson's ratio (NPR) lattice structures have great significance in engineering applications. This paper provides a comprehensive literature review on lattice structure design, mechanical property, manufacturing technique, and deformation mechanism, aiming to develop innovative metamaterials. Various lattice structure design solutions, including re-entrant structures, chiral structures, and rotating rigid structures, are discussed. The associated mechanical properties, manufacturing methods, and potential applications in different industries are also presented.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Linyi Yang, Mao Ye, Yonghui Huang, Jingkun Dong
Summary: A negative Poisson's ratio honeycomb material has anti-conventional deformation behavior and high impact resistance, making it a promising lightweight microstructure material. However, research on three-dimensional structures is limited compared to microscopic and two-dimensional levels. Three-dimensional negative Poisson's ratio structural mechanics metamaterials have advantages of lighter mass, higher material utilization, and more stable mechanical properties, and they have great potential for development in aerospace, defense, and transportation industries.
Article
Engineering, Mechanical
Maryam Morvaridi, Giorgio Carta, Federico Bosia, Antonio S. Gliozzi, Nicola M. Pugno, Diego Misseroni, Michele Brun
Summary: A novel two-dimensional hierarchical auxetic structure is proposed, utilizing interactions between different scale cuts to achieve a Poisson's ratio close to the minimum limit. Experimental validation on a polymeric specimen demonstrates the effectiveness of the structure, which shows potential for various engineering applications.
EXTREME MECHANICS LETTERS
(2021)
Article
Materials Science, Textiles
Hasan Kamrul, Adeel Zulifqar, Yadie Yang, Shuaiquan Zhao, Minglonghai Zhang, Hong Hu
Summary: This study conducted a geometrical analysis of auxetic woven fabrics based on foldable geometry and established a relationship between Poisson's ratio and tensile strain. Semi-empirical equations were used to predict the auxetic behavior of fabrics with different geometrical parameters, which were validated by experimental results showing excellent agreement.
TEXTILE RESEARCH JOURNAL
(2022)
Review
Materials Science, Composites
Yuping Chang, Hong Hu
Summary: 3D fabrics with negative Poisson's ratio exhibit unique properties and have broad applications in various fields.
APPLIED COMPOSITE MATERIALS
(2022)
Article
Materials Science, Textiles
Chang Yuping, Yanping Liu, Hu Hong
Summary: In this research, a novel type of auxetic fabrics based on rotating square geometry is proposed and manufactured using laser cutting and lamination technique. The deformation behavior and auxetic effects of the laminated fabrics are investigated through tensile tests. The results show that the auxetic behavior of the laminated fabrics mainly depends on the initial modulus difference between the base material and the laminated frame material, as well as the initial intersection angle and size of square units. Additionally, three-layer laminated fabrics are found to be more desirable in terms of avoiding out-of-plane deformation and extending the tensile strain range of auxeticity.
TEXTILE RESEARCH JOURNAL
(2022)
Review
Physics, Condensed Matter
Danish Tahir, Minglonghai Zhang, Hong Hu
Summary: Life-changing illnesses and fatalities caused by inefficient personal protective clothing and equipment are increasing. The discrepancy between test standards, environmental conditions, and actual collisions is the reason why personal protection equipment and clothing have not reduced injuries in fields such as military and sports. Auxetic materials are suggested as a solution due to their unique properties. This review discusses the importance of auxetic materials in personal protection and explores possible improvements in protection products.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Review
Polymer Science
Danish Tahir, Muhammad Ramzan Abdul Karim, Hong Hu, Sufyan Naseem, Muhammad Rehan, Mairaj Ahmad, Minglonghai Zhang
Summary: Nanocellulose, extracted from plants, animals and bacteria, is a versatile material with excellent properties and wide-ranging applications. Chemical modification can enhance its properties by altering the surface characteristics of nanocellulose.
Article
Engineering, Civil
Mohaddeseh Gholikord, Ehsan Etemadi, Mohammad Imani, Mahboubeh Hosseinabadi, Hong Hu
Summary: This study aims to improve the performance of negative stiffness structures in terms of energy absorption and maintaining their original configuration under cyclic loading. Novel designed negative stiffness structures were simulated, fabricated, and tested experimentally, showing good agreement between simulation and experimental results.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Composites
Minglonghai Zhang, Mabel Mei Po Ho, Hong Hu
Summary: This paper investigates the low-velocity impact performance of 3D auxetic composite with re-entrant triangle inclusions through experiments and finite element simulations. The results show that auxetic composites exhibit better energy absorption and impact resistance compared to non-auxetic composites. The embedding of more inclusions further enhances the impact resistance of auxetic composites. The research provides insights into the impact performance of auxetic composites with random inclusions.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Textiles
Yuan Zhang, Hong Hu, Yordan Kyosev, Yanping Liu
Summary: Three-dimensional spacer fabric is a cushioning material with linear, plateau, and densification stages under compression. This article uses finite element simulation to explain the compression mechanism of a typical spacer fabric, including global deformation, local deformation, and internal contact behavior of spacer monofilaments. The linear stage is post-buckling, the plateau stage involves post-buckling, torsion, rotation, and contact, and the densification stage is due to contact between the spacer monofilaments and outer layers. Vertical spacer monofilaments contribute more to compression resistance compared to inclined ones.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Engineering, Civil
Ehsan Etemadi, Mohaddeseh Gholikord, Muhammad Zeeshan, Hong Hu
Summary: The aim of this paper is to develop two novel in-plane auxetic structures with remarkable stiffness and negative Poisson's ratio (NPR) appropriate for compression and tensile load-bearing structures. The designed structures present tunable NPRs and approximately equal stiffnesses for both compressive and tensile loadings. The comparison results suggest that our developed structures can be considered as strong candidates for the next generation of SDM auxetic structures with high stiffness capability and noticeable NPR values.
THIN-WALLED STRUCTURES
(2023)
Review
Chemistry, Physical
Shanshan Dong, Hong Hu
Summary: Auxetic materials exhibit counter-intuitive behavior with a negative Poisson's ratio, resulting in improved mechanical properties and potential applications in various fields. This review focuses on the use of auxetic materials or structures in sensors, providing an overview of auxetic-based sensing devices. Material selection, structure design, preparation method, sensing mechanism, and performance are discussed. The relationship between the auxetic mechanism and sensing performance, as well as potential applications and future research directions, are also explored.
Article
Polymer Science
Muhammad Zeeshan, Hong Hu, Ehsan Etemadi
Summary: This study presents a geometrical analysis of three-dimensional auxetic woven structures based on semi-empirical equations. A three-dimensional fabric was developed with a special geometrical arrangement to achieve an auxetic effect. The geometrical model correlated well with experimental results, demonstrating its usefulness in predicting the auxetic behavior of 3D woven fabrics with different structural parameters.
Article
Materials Science, Textiles
Yuping Chang, Yanping Liu, Hong Hu
Summary: The auxetic property of the macro-porous rotating square structure was studied using experimental and numerical methods. An elastic base material was proposed to improve the strength of the structure while maintaining its auxetic behavior. Numerical analysis was conducted to explain the auxetic effect observed in the laminated fabrics. The results showed agreement between the simulation and experimental results, and highlighted the importance of the modulus difference between the frame and the base materials for the generation of the auxetic effect.
JOURNAL OF INDUSTRIAL TEXTILES
(2023)
Article
Chemistry, Analytical
Qingguo Wen, Pengju Li, Zhengkai Zhang, Hong Hu
Summary: This research paper introduces an innovative technique for measuring displacement using auxetic tubular structure (ATS). The proposed method converts the variation in light transmission into a corresponding variation in output voltage by capitalizing on the relationship between the elastic deformation-induced change in transmittance of the ATS and the output current of the solar cell. The experimental results demonstrate the effectiveness and feasibility of the proposed method, showing a favorable linear relationship between the input and output of the measurement system with an acceptable sensitivity, repeatability, and reliability.
Article
Mechanics
Ehsan Etemadi, Mahbubeh Hosseinabadi, Fabrizio Scarpa, Hong Hu
Summary: This paper presents the design, 3D printing, and testing of a novel type of auxetic structure. The results show that the structure with Dumbell-shaped struts exhibiting negative Poisson's ratio outperforms other structures in terms of specific stiffness, specific energy absorption, and Poisson's ratio. The study also investigates the effects of geometry parameters on the structure's performance.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Textiles
Chang Yuping, Yanping Liu, Zhao Shuaiquan, Hu Hong
Summary: This study explores the manufacturing of 3D warp-knitted fabrics with auxetic properties using warp knitting technology. Different geometric designs were evaluated for their auxetic behavior in various directions. The research offers an alternative method for producing auxetic warp-knitted spacer fabrics directly through a single knitting process.
TEXTILE RESEARCH JOURNAL
(2022)
