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
Mechanics
Dong Han, Yi Zhang, Xiang Yu Zhang, Yi Min Xie, Xin Ren
Summary: Novel auxetic tubes (NAT) were designed, fabricated and examined, showing improved specific energy absorption (SEA) without sacrificing the auxetic characteristic. The effect of unit cell parameters on the mechanical properties of NAT tubes was explored, suggesting that rib reduction can enhance SEA without sacrificing the auxetic effect. Three novel ribbed auxetic tubes (NRAT) were proposed, with the addition of a straight rib to the inner long axis of the ellipse found to improve SEA. The larger the straight rib width, the higher the energy absorption. The stability of 3D auxetic tubular metamaterial was found to be greater than that of 2D auxetic thin-plate metamaterial.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Yao Chen, Wangjie Ye, Ruizhi Xu, Yue Sun, Jian Feng, Pooya Sareh
Summary: In this paper, a new approach to designing auxetic metamaterials is proposed using a group-theory-based symmetry reduction approach. These metamaterials can be fabricated by using active or smart structural members that undergo different deformations when subjected to external stimulations. By applying controlled stimuli to the initial structure, desired symmetry-reduced structural configurations are obtained, facilitating the programmability of Poisson's ratio.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Zhihao Yuan, Zhiming Cui, Jaehyung Ju
Summary: The study establishes a generalized micropolar homogenization method to characterize the elastic constants of chiral and achiral lattices, revealing coupling effects and directional Poisson's ratio properties of different structures. This offers a powerful platform for designing metamaterials by adjusting both anisotropy and chirality through geometric reconfiguration of lattice structures.
MATERIALS & DESIGN
(2021)
Article
Engineering, Civil
Stefan Tabacu, Nicolae Doru Stanescu
Summary: This research investigates the behavior of auxetic, anti-tetra-chiral structures designed as tubes subjected to tensile quasi-static loads. Experimental work and numerical simulations were conducted to establish theoretical calculation models for estimating reaction forces and validate the proposed model.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Mechanical
Xian Cheng, Yi Zhang, Xin Ren, Dong Han, Wei Jiang, Xue Gang Zhang, Hui Chen Luo, Yi Min Xie
Summary: Auxetic materials are mechanical metamaterials that exhibit lateral expansion under tension and contraction under compression. Enhancing the stiffness of these materials is a focus of research to expand their potential applications. This study designs re-entrant unit cells with variable stiffness factors and verifies their accuracy through experimental and numerical analyses. The findings demonstrate that the compression points of the proposed structures can be quantitatively tuned, providing a new method for optimizing the design of unit cells with negative Poisson's ratio.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Lumin Shen, Kai Wei, Ke Yuan, Chong Shi, Zhendong Li, Zhonggang Wang
Summary: This work proposes a novel metamaterial that combines auxeticity and thermal shrinkage by introducing a bi-material double-square into the star-shaped configuration. The results show that the desired properties of the metamaterial can be customized by adjusting the appropriate geometric and material parameters. Compared with other star-shaped metamaterials, the design in this study exhibits significant advantages in auxeticity and thermal shrinkage, and it also maintains auxetic properties under large deformation. This metamaterial has potential applications in smart actuators and satellite antennas due to its thermal stability.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Zhen-Pei Wang, Yingjun Wang, Leong Hien Poh, Zhuangjian Liu
Summary: This article proposes a design method using isogeometric analysis, which describes chiral and anti-chiral structures through parametrization and provides designs with tunable properties. The method can achieve the best achievable auxeticities under different stiffness requirements considering plane strain and stress conditions, and demonstrates potential for electronic-skin applications.
COMPOSITE 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
Engineering, Mechanical
Yilin Zhu, Songhui Jiang, Qi Zhang, Jian Li, Chao Yu, Chuanzeng Zhang
Summary: Missing rib auxetics with a reinforced central core may have tunable negative Poisson's ratios and other mechanical parameters. In this work, a novel enhanced tetra-missing rib honeycomb metamaterial is proposed. The proposed metamaterial exhibits tailorable Poisson's ratios and elastic and shear moduli in wide ranges. The stiffness of the present design is improved remarkably compared to the previously developed enhanced anti-tetra-missing rib honeycomb.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(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
V Harinarayana, Y. C. Shin
Summary: In this study, a comprehensive design and fabrication of a three-dimensional axisymmetric auxetic structure that exhibits uniform and axisymmetric transverse deformation under longitudinal compression loading is proposed. The design of the metamaterial is generated by revolving a two-dimensional parabolic curve along the axis of rotation and subsequently perforating the structure periodically with elliptical voids. The significance of the perforations is elucidated by comparing the metamaterial structure to a plain structure.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Review
Engineering, Civil
Rafael Augusto Gomes, Lucas Antonio de Oliveira, Matheus Brendon Francisco, Guilherme Ferreira Gomes
Summary: This paper summarizes the definitions, designs, analyses, optimizations, mechanical properties, and specific applications of various auxetic tubular structures. It highlights the importance of additive manufacturing and numerical analysis in manufacturing and analyzing these structures. The purpose of this paper is to provide researchers and engineers with a step-by-step methodology for developing and applying auxetic tubular structures.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Taiqi Hu, Taisong Pan, Dengji Guo, Yang Xiao, Fan Li, Min Gao, Zhenlong Huang, Jia Zhu, Tiedong Cheng, Yuan Lin
Summary: The incorporation of a chiral auxetic metamaterial (CAM) into the elastomer substrate of a stretchable strain sensor significantly enhances its sensitivity and omnidirectional sensing ability. The regulation mechanism associated with crack propagation on the deformed substrate is revealed through finite element simulations and experiments. The demonstration of on-body monitoring of human physiological signals and a smart training assistant for trampoline gymnastics further illustrates the benefits of omnidirectionally enhanced performance.
Article
Engineering, Civil
Yilin Zhu, Songhui Jiang, Fucong Lu, Xin Ren
Summary: In this study, a novel enhanced anti-tetra-missing rib structure was proposed and its mechanical properties and deformation mechanism were investigated using mechanical modeling and finite element analysis. The results showed that the structure provides tunable Poisson's ratios and elastic and shear moduli.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)