Article
Mechanics
Liang Wang, Hai-Tao Liu
Summary: This work presents a parameter optimization method using Python script to meet the urgent need for lightweight honeycomb metamaterial. Results show that the combination of Python script programming model and genetic algorithm optimization method can achieve optimal solutions for honeycomb metamaterial. The optimized parameters demonstrate an admirable auxetic effect in the 3D honeycomb, providing strong evidence for the continuous application of optimization algorithms in improving mechanical properties.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Nanfang Ma, Qiang Han, Sihao Han, Chunlei Li
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
Chemistry, Physical
Farrukh Mustahsan, Sohaib Z. Khan, Asad A. Zaidi, Yaser H. Alahmadi, Essam R. Mahmoud, Hamad Almohamadi
Summary: This paper presents a modified re-entrant honeycomb auxetic structure and verifies its performance through analytical modeling, finite element analysis, and tensile testing. The results show that the newly added strut has a significant effect on the directional properties of the structure, and the structure exhibits high Young's modulus and negative Poisson's ratio in both loading directions, especially at low relative density.
Article
Engineering, Electrical & Electronic
Pengju Li, Xilin Zhang, Zhengkai Zhang, Qingguo Wen
Summary: A new force measurement method based on the auxetic structure is proposed in this paper, using a light source, auxetic structure, and solar cell. The method avoids contact between components, and experimental results show improved sensitivity and linearity over traditional methods.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Mechanical
Feng Jiang, Shu Yang, Yu Zhang, Chang Qi, Shang Chen
Summary: In this study, a novel graded re-entrant circular auxetic honeycomb structure was proposed and fabricated using a low-cost method. The crushing behaviors of different designs of the honeycomb structure were investigated, and the results showed that the gradient design can control the deformation modes and improve the energy absorption capacity. Under dynamic impacts, the honeycomb structure with a negative gradient design exhibited better performance and negative Poisson's ratio behavior. This study provides new insights for the fabrication and design of auxetic metamaterials.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Feng Jiang, Shu Yang, Chang Qi, Hai-Tao Liu
Summary: In this study, the two plateau characteristics of re-entrant honeycomb (REH) with negative Poisson's ratio (NPR) in the concave direction were investigated through experimental, numerical, and theoretical methods. The results showed that due to the transitional rectangle structures formed during crushing, the REH specimens exhibited a two-step deformation mode and two plateau stresses in the stress-strain curves. Both numerical and theoretical predictions agreed well with the experimental results. Parameter analysis indicated that different geometric parameters influenced the plateau stresses, and the crushing velocity also affected the characteristics of the honeycomb structure.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
Xing Chi Teng, Xin Ren, Yi Zhang, Wei Jiang, Yang Pan, Xue Gang Zhang, Xiang Yu Zhang, Yi Min Xie
Summary: A simple 3D re-entrant unit cell is designed in this study, and the influence of geometric parameters on the performance of the structure is investigated numerically. Experimental results show that the proposed 3D re-entrant auxetic metamaterial exhibits stable compression deformation and desirable energy absorption behavior, which can be utilized for designing protective structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Physical
Jinming Lian, Zhenqing Wang
Summary: This study investigates the crushing behavior of a new honeycomb structure and discusses the effects of different gradient parameters on deformation mode and extrusion response. The results show that the influence of these parameters varies for in-plane and out-of-plane crushing of the honeycomb.
Article
Engineering, Mechanical
Zhi Tao, Xin Ren, Ai Guo Zhao, Long Sun, Yi Zhang, Wei Jiang, Dong Han, Xiang Yu Zhang, Yi Min Xie
Summary: This study proposes an acoustic metamaterial plate based on the negative Poisson's ratio structure, which has lower frequency, wider bandgap, and tunable bandgap compared to traditional plates. By increasing compression strain, the variation range of the bandgap frequency can be enlarged. This finding broadens the design of low-frequency broadband acoustic devices for dynamic environments, while providing new ideas and methodologies for real-time adjustment of bandgaps.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Civil
Chang Qi, Lian-Zheng Pei, Alex Remennikov, Shu Yang, Feng Jiang
Summary: This paper theoretically studies the crushing response of metallic 3D re-entrant honeycomb structures and analyzes their crushing strength. The results reveal that the oblique wall length and cell wall thickness have a significant effect on the crushing strength, while other parameters have a minor effect. Additionally, a new type of 3D re-entrant honeycomb unit structure is discovered and its crushing strength is derived and validated.
THIN-WALLED STRUCTURES
(2023)
Article
Physics, Condensed Matter
Sai Bao, Xin Ren, Yu Jun Qi, Hao Ran Li, Dong Han, Wei Li, Chen Luo, Zhong Zheng Song
Summary: This paper investigates a modified auxetic re-entrant honeycomb structure that enhances the energy absorption capacity by adding curved ribs to the conventional re-entrant honeycomb structure. The in-plane quasi-static compression response of the structure under large deformation is explored numerically, and the validity of the numerical simulation is verified through quasi-static compression tests. The results from both experiments and simulations show the occurrence of two plateau stresses in the load-displacement curves of the structure during the quasi-static compression process, with the second plateau stress being significantly higher than the first one. The occurrence time of the second plateau stress can be controlled by adjusting the distance between the concave curved ribs in the structure. The findings suggest that the modified auxetic re-entrant honeycomb structures have great potential for various applications in civil engineering, vehicle crashworthiness, and protective infrastructure.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Mechanics
Feng Jiang, Shu Yang, Chang Qi
Summary: In this study, a new type of three-dimensional auxetic metamaterial was proposed and its crushing response under quasi-static compression was investigated through experimental tests and numerical simulations. The results showed that the proposed metamaterial exhibited an X deformation mode and had a higher energy absorption capacity compared to other structures. Additionally, the effects of geometric parameters and friction coefficient on the material's performance were also studied.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yang Zhou, Yi Pan, Lin Chen, Qiang Gao, Beibei Sun
Summary: A novel auxetic honeycomb structure named re-entrant combined-wall (RCW) honeycomb is developed in this study by introducing hierarchical substructures to enhance its performance. Experimental results show that the RCW honeycomb exhibits high orthogonality, tunability, and increased crushing strength under large deformation.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Civil
Sheng Yu, Zhikang Liu, Xiaoming Cao, Jiayi Liu, Wei Huang, Yangwei Wang
Summary: This paper investigates the compressive performance and failure behavior of composite auxetic re-entrant honeycomb sandwich structure. Different gradient configurations of auxetic re-entrant honeycomb structures were manufactured and tested. The compressive responses and deformation mechanisms were analyzed based on stress-strain curves and deformation processes. The Poisson's ratio, energy efficiency, and plateau stress were defined and used to study the auxetic performance and energy absorption ability. A high-fidelity numerical model was established to analyze the compressive performances and failure behaviors, and the results agreed well with experimental results.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Aerospace
Yu Chen, Zhi-Wei Wang
Summary: This study proposed an improved hexagonal honeycomb structure by replacing the solid junction with a small hollow circle, resulting in a novel honeycomb. Theoretical models based on energy approach were developed to predict the elastic properties of the new honeycomb, and finite element analysis was used to verify the models and investigate the effects of micro geometrical parameters. The results showed that the new honeycomb exhibited a negative Poisson's ratio effect, higher specific Young's modulus and shear modulus compared to the common hexagonal honeycomb. It also demonstrated a more tailored anisotropy. Therefore, the new honeycomb could be an effective substitute for the common hexagonal honeycomb and provide guidance for improved design of auxetic honeycombs.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Civil
Yu Ming Luo, Ting Ting Huang, Yi Zhang, Hang Hang Xu, Yi Min Xie, Xin Ren
Summary: A novel seismic metamaterial (SM) composed of steel and rubber is proposed for attenuating ultra-low frequency seismic Lamb waves. The band structure and bandgaps of SMs are analyzed using the finite element method and the vibration modes of waves at the bandgap boundary frequency are studied. The authenticity of the bandgaps is confirmed through the analysis of the transmission spectrum. Parameter analyses reveal that geometric variables, material properties, equivalent mass density, and structural matrix forms significantly affect the bandgap and transmission properties. The proposed SM has a smaller size while maintaining wide bandgaps at 0-20 Hz, effectively covering the 2 Hz seismic peak spectrum that causes building destruction.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Ru Yuan Huo, Dong Han, Yi Zhang, Wei Jiang, Le Yang Fan, Xin Wei Peng, Ge Chen Jie Shi, Ming Hao Chu, Xiang Yu Zhang, Yi Min Xie, Xin Ren
Summary: The incorporation of aluminum foam in auxetic tubes enhances stability, stiffness and energy absorption. This study compared the mechanical properties of auxetic circular and square tubes. The foam-filled auxetic square tube (FFAST) showed the best specific energy absorption (SEA) of 1.45 and exhibited a pronounced auxetic effect. The finite element method was used to analyze FFAST, finding that thinner wall thickness leads to greater SEA and decreasing ellipticity increases yield load and SEA.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Yuanpeng Liu, Ting-Uei Lee, Antiopi Koronaki, Nico Pietroni, Yi Min Xie
Summary: Space frame structures are favored in contemporary free-form architectural designs for their elegant appearance and excellent structural performance. However, the use of different shaped nodes in doubly-curved space frame structures leads to high manufacturing costs. In this study, a new clustering-optimization framework is proposed to reduce the variety of node shapes, achieving congruence while approximating a target surface. The method is validated through numerical examples and demonstrated in a complex architectural project.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Hang Hang Xu, Hui Chen Luo, Xue Gang Zhang, Wei Jiang, Xing Chi Teng, Wei Qiu Chen, Jie Yang, Yi Min Xie, Xin Ren
Summary: Auxetic materials have been extensively studied due to their unique mechanical properties and deformation modes. However, their practical engineering applications are limited by their low stiffness. This study combines re-entrant aluminum honeycomb with aluminum foam to enhance the stiffness of auxetic materials. Experimental and numerical investigations on the mechanical properties and deformation modes are conducted, along with the analysis of the effects of geometrical parameters. The proposed auxetic composite structures show promising applications in vehicle engineering, protective engineering, and aerospace engineering due to their superior performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Green & Sustainable Science & Technology
Mohamed Gomaa, Sascha Schade, Ding Wen Bao, Yi Min Xie
Summary: The increasing awareness of the negative environmental impact of cement-based products has led to a reconsideration of earth construction within the digital framework of Industry 4.0. The research on advanced manufacturing of earth construction has been intensified, particularly in additive manufacturing of clay-rich soil. However, limited research has been conducted on mechanizing methods such as rammed earth. This paper collected and analyzed the latest research on the advanced manufacturing of rammed earth construction, providing insights and a roadmap for its digital manufacturing.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Civil
Wei Jiang, Xue Gang Zhang, Dong Han, Lu Wang, Wei Qiu Chen, Yi Min Xie, Xin Ren
Summary: This article presents a novel fabrication methodology for auxetics by assembling plates and tubes, instead of using costly and inefficient manufacturing processes like 3D printing and laser cutting. The proposed structures show favorable mechanical performance and low-cost, large-scale fabrication potential, making them promising for applications in protective equipment and smart energy absorbers.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Hongjia Lu, Ting-Uei Lee, Jiaming Ma, Da Chen, Yi Min Xie
Summary: Functionally graded porous materials have superior properties and wide range of applications. This study proposes a novel two-step topology optimisation framework to design 2D stochastic porous structures, which demonstrate higher compliance and minimal impact on structural stiffness. The developed technique is numerically robust and enables designers to choose structures with desired properties.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Gang Wang, Dawei Li, Tingting Liu, Changdong Zhang, Yi Min Xie, Wenhe Liao
Summary: This study presents a novel approach for developing modular and lightweight microwave absorbing metastructure using additive manufacturing technology. The metastructures are manufactured using a composite process of 2D and 3D printing, and the square ring size and thickness are adjusted to increase absorption bandwidth. A multilayer stacking method is utilized for modular design and the structure shows excellent absorption characteristics.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Yunzhen He, Zi-Long Zhao, Xiaoshan Lin, Yi Min Xie
Summary: This paper presents a method for shape and topology optimization problems, which controls the structural complexity by integrating a hole-filling method into the evolutionary structural optimization framework. The results show that the proposed method can generate structurally efficient designs with controllable topologies and improve the stiffness of the optimized structures.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Xing Chi Teng, Wei Jiang, Xue Gang Zhang, Dong Han, Xi Hai Ni, Hang Hang Xu, Jian Hao, Tong Guo, Yu Fei Wu, Yi Min Xie, Xin Ren
Summary: A novel sandwich panel structure inspired by the synclastic curvature behavior of auxetic metamaterial was proposed to improve the controllability, auxeticity, flexibility, and synclastic curvature of traditional sandwich panels. Experimental and numerical methods were used to compare the similarities and differences between the novel and traditional sandwich panels under uniaxial compression. The study also explored the auxeticity, stretchability, synclastic curvature, and potential applications of the novel sandwich panel.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Instruments & Instrumentation
Zeyao Chen, Junhao Li, Baisheng Wu, Xin Chen, Xin Ren, Yi Min Xie
Summary: This study proposes a hedgehog biomimetic helmet with auxetic lattice liners that provides superior protection in mitigating traumatic brain injury (TBI). The simulation model evaluates the helmet's performance in reducing TBI risks and shows significant reduction in head injury criterion value. Parametric studies and optimization design result in a lightweight auxetic lattice liner with superior protective performance.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Civil
Xing Chi Teng, Xi Hai Ni, Xue Gang Zhang, Wei Jiang, Yi Zhang, Hang Hang Xu, Jian Hao, Yi Min Xie, Xin Ren
Summary: This paper proposes a new stretchable sandwich structure and investigates its influence on the mechanical properties of traditional sandwich structures through experiments and finite element methods. The results show that the stretchable sandwich structures have good stress and energy absorption capacity, as well as the ability of in-plane deformation and active bending. Furthermore, by combining the functional characteristics of sandwich structures and rotating polygons, the stretchable sandwich structures can adjust their surface area, porosity, and in-plane negative Poisson's ratio effect while maintaining bearing capacity.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Xue Gang Zhang, Wei Jiang, Yi Zhang, Dong Han, Chen Luo, Xiang Yu Zhang, Jian Hao, Yi Min Xie, Xin Ren
Summary: This study proposes two 3D honeycomb structures, namely 3D re-entrant honeycomb and 3D hexagonal honeycomb, and investigates their mechanical properties, deformation modes, and deformation mechanisms under three-point bending through experimental and numerical analysis. Compared to the non-auxetic hexagonal honeycomb, the 3D auxetic re-entrant honeycomb exhibits higher ductility and fracture resistance. Additionally, the mid-span section of the 3D auxetic honeycomb shows a trapezoidal deformation mode under bending, which differs from the conventional honeycomb structure. The influence of the number of unit cells and geometric parameters on the mechanical properties of the 3D honeycomb structure is also systematically studied. The excellent bending performance of the auxetic honeycomb provides a basis for its application in biomedicine, soft robots, and buffer devices.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Cong Wang, Yi Min Xie, Zicheng Zhuang, Xuyu Zhang, Shiwei Zhou
Summary: The paper proposes an inverse homogenization method based on fast Fourier transform to extract material strength from the perspective of the von Mises yield criterion. The method represents the microstructure profile using a linear combination of cubic B-spline basis functions with repeated knots and minimizes the strength through a reaction diffusion-based B-spline level set method.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2024)
