Article
Engineering, Geological
Hosain Bagheri, Daniel Stockwell, Benjamin Bethke, Nana Kwame Okwae, Daniel Aukes, Junliang Tao, Hamid Marvi
Summary: This study presents a bio-inspired burrowing robot and explores its burrowing behavior in glass beads. The study found that the four-bladed screw provides higher translational velocity but comes at the expense of higher motor torque and power, resulting in higher cost of transport. Additionally, operating the one-bladed screw at a lower rotational speed provides lower cost of transport. The tubercled fin design showed promising results in decreasing vertical drag and increasing translational velocity during burrowing.
Article
Engineering, Multidisciplinary
Yu Lu, Ziying Li, Xin Chang, Zhenju Chuang, Junhua Xing
Summary: This paper proposes a groundbreaking method for the aerodynamic optimization design of bio-inspired wing with leading-edge tubercles, focusing on the optimization design of spanwise waviness in the leading edge to delay stall and increase lift. Numerical investigations using CFD computations validate the numerical scheme, while the combination of Non-dominated Sorting Genetic Algorithm II and Response Surface Method based Kriging Model is adopted as the aerodynamic optimization strategy.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2021)
Article
Biotechnology & Applied Microbiology
Zhihao Zhao, Yinghao Ge, Lingyun Xu, Xiaohan Sun, Jing Zuo, Zhenglin Wang, Hongyang Liu, Xiangyu Jiang, Dong Wang
Summary: This paper introduces a polymer-based organic vapor sensor inspired by the mammalian olfactory recognition system. By introducing aggregation-induced emission molecules, the sensor has dual optical sensing mechanisms, enabling high accuracy and low detection limit for multiple organic vapors.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Mechanics
Chunyu Wang, Yi Liu, Duo Xu, Shizhao Wang
Summary: Birds and bats can enhance aerodynamic performance through a combination of flapping and local sweep morphing, providing a possible approach for improving micro aerial vehicles.
Article
Thermodynamics
Dong Guan, Biyu Pan, Zhen Chen, Jing Li, Hui Shen, Huan Pang
Summary: A quantitative model is proposed in this study to characterize the pressure distribution on bipolar plates. A theoretical model is established based on finite element modeling (FEM) and measurement, and flexible pressure sensors are used for testing. Furthermore, a nacre-inspired optimization approach is applied to improve the uneven pressure distributions. Results show that the optimized design can significantly improve the uneven clamping load and provide an effective approach for designing durable PEMFC stacks.
Article
Engineering, Multidisciplinary
Ming Xu, Jin Ma, Jindong Zhao, Yongfa Zhang, Di Zhang
Summary: This paper presents a novel pneumatic soft joint actuator inspired by the joint structure and actuation mechanism of spider legs. The actuator achieves joint rotation through the mutual compression of two hyperelastic sidewalls under inflation pressure. A pneumatic hyperelastic thin plate (Pneu-HTP) based actuation modeling method is proposed for this extrusion actuation, and mathematical models for parallel and angular extrusion actuation are derived. Finite element analysis simulations and experiments are conducted to evaluate the accuracy of the Pneu-HTP extrusion actuation model. The results show high consistency between the model and the experiments, with average relative errors ranging from 9.27% to 12.5% and goodness-of-fit greater than 99%.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Mechanics
Taoye Lu, Hui-Shen Shen, Hai Wang, Xiuhua Chen, Miaolin Feng
Summary: The optimization design of bio-inspired helicoidal CFRPC laminates with various arrangements is carried out using ABAQUS and ASA algorithm. The compressive and thermal postbuckling behavior of these laminates are studied, and the occurrence of secondary buckling and mode jumping is examined. The results show that the bio-inspired helicoidal CFRPC laminates can improve the buckling load, buckling temperature, compressive and thermal postbuckling strength.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Ai-Jun Li, Hui Fang, Yong Liu
Summary: This paper studies the interaction between water waves and a very large floating laminated disk in water of finite depth. An analytical solution and an approximated model are developed to calculate the deflection and bending moment of the disk, as well as the effects of different parameters on wave force and wave field.
Article
Chemistry, Multidisciplinary
Jun Dong, Lili Zhu, Pengju Guo, Cunyun Xu, Xusheng Zhao, Shijing Yang, Xiaofeng He, Guangdong Zhou, Gang Ma, Hengyu Guo, Chenguo Hu, Qunliang Song
Summary: This study proposes a high-performance droplet-based nanogenerator based on solid-liquid contact electrification, which utilizes both displacement current and conduction current as the driving forces to output high-voltage direct current without a rectifier. It successfully realizes voltage-controlled electric shock process and demonstrates unparalleled capability for harvesting high-entropy water energy. This new device provides new insights into energy harvesting from solid-liquid interfaces and offers a compact, efficient, and cost-effective energy collection system.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Xuhai Liu, Fengyun Wang, Jie Su, Ye Zhou, Seeram Ramakrishna
Summary: Neuromorphic circuits have made significant progress in simulating brain functionality, but are still far behind biological neural circuits. The lack of comprehensive understanding of the brain's operating mechanism and the use of 3D neuromorphic hardware with compatible software algorithms can help overcome the limitations of current 2D artificial circuits.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhouyue Lei, Wencheng Zhu, Xingcai Zhang, Xiongjun Wang, Peiyi Wu
Summary: The research developed a biomimetic hydrogel to address the key challenges encountered by traditional synthetic hydrogel-based ionic skins, providing stability, adhesion, hydration, sensitive detection, and enhanced treatment efficacy in ambient conditions.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Marine
Sarat Chandra Mohapatra, C. Guedes Soares
Summary: A hydroelastic model is developed to study the characteristics of a floating flexible structure under oblique wave action. The effects of various design parameters and oblique wave incidence angle on the structural performance are analyzed through analytical and numerical methods.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Biomedical
Mingxia Chen, Taijun Chen, Jiafan Bai, Siyuan He, Minyue Luo, Yili Zeng, Wenzhen Peng, Yuancong Zhao, Jianxin Wang, Xiangdong Zhu, Wei Zhi, Jie Weng, Kai Zhang, Xingdong Zhang
Summary: In this study, a multifunctional hydrogel bio-glue was developed using polyglutamic acid (PGA), tyramine hydrochloride (TYR), and tannic acid (TA) as precursors and DMTMM as condensation agent. This bio-glue showed strong adhesion to various tissues and wet materials, and also exhibited anti-oxidation and hemostasis functions. It demonstrated excellent performance in wound, liver, and cartilage repair, indicating its potential for clinical application. This study opens up a new avenue for the development of multifunctional hydrogel bio-adhesives.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Multidisciplinary Sciences
Yupeng Chen, Zhongpeng Zhu, Martin Steinhart, Stanislav N. Gorb
Summary: This article discusses the concept of bio-inspired wet adhesion, reviews associated challenges, and discusses future directions. It also proposes a model for wet adhesion management.
Review
Chemistry, Analytical
Tomasz Wasilewski, Jacek Gebicki, Wojciech Kamysz
Summary: Animals' unique abilities in analyzing complex gas substances make them the gold standard in explosives analysis, and the unusual capabilities of biological chemosensory systems inspire the development of devices mimicking their activity. The electronic analogues are being extensively studied in various research centers, bringing commercialization closer and potentially replacing or complementing animals in gas substance analysis.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Civil
Xiao-Hui Wang, Dong-Gang Hu, Ahmad Kueh Beng Hong, Dan-Da Shi
Summary: This study considers the influence of transverse cracks on chloride ion diffusion in cracked concrete of in-service reinforced concrete elements under marine environment and proposes a model to predict the equivalent chloride diffusion coefficient. The results show that the proposed model can better reflect the variation trend of the equivalent chloride diffusion coefficient with different crack widths.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Engineering, Mechanical
Qian Zhang, Yuanyuan Li, Ahmad B. H. Kueh, Zelun Qian, Jianguo Cai
Summary: In this paper, a new type of compliant joint is designed and its performances are studied through parameter analysis and optimization, showing that it can effectively control the behavior and configuration of mechanisms. The study also finds that origami-inspired structures have a high residual stiffness.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Chemistry, Physical
Rayed Alyousef, Hossein Mohammadhosseini, Ahmed Abdel Khalek Ebid, Hisham Alabduljabbar, Shek Poi Ngian, Ghasan Fahim Huseien, Abdeliazim Mustafa Mohamed
Summary: This research investigates the performance of prepacked aggregates fiber-reinforced concrete (PAFRC) with adequate acoustic characteristics. The results show that the inclusion of waste polypropylene (PP) fibers slightly affects the strength and acoustic properties of PAFRC, but improves its tensile strength and sound insulation performance, especially at higher fiber dosages.
Article
Engineering, Multidisciplinary
Wei Li Tan, Yeong Huei Lee, Cher Siang Tan, Yee Yong Lee, Ahmad Beng Hong Kueh
Summary: This paper examines the mechanical properties and fracture prediction of sustainable lightweight aggregates concretes, finding that homogeneous coarse aggregates exhibit higher compression, tensile, and flexural strengths compared to heterogeneous aggregates. Most of the investigated mixes can achieve structural use, and those containing expanded clay lower the corresponding sorptivity values. However, further investigations are recommended for better properties forecasting of lightweight aggregate concrete.
JURNAL TEKNOLOGI-SCIENCES & ENGINEERING
(2022)
Article
Construction & Building Technology
Rayed Alyousef, Hossein Mohammadhosseini, Ahmed Farouk Deifalla, Shek Poi Ngian, Hisham Alabduljabbar, Abdeliazim Mustafa Mohamed
Summary: Sheep wool is a natural renewable fiber composite material with environmental, ecological, and economic advantages. However, natural fibers have certain drawbacks. Surface modification of natural fibers can improve their performance, and the addition of sheep wool in concrete composites can enhance tensile strength and impact resistance, increasing concrete ductility and energy absorption capacity.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Mechanical
Qian Zhang, Yihan Zhong, Zizhe Wang, Ahmad B. H. Kueh, Jianguo Cai, Jian Feng
Summary: This paper proposes a mechanical model with the prestress and deflection based on Foppl-von Karman equations, and introduces nonlinear buckling finite element analysis and experiments to determine key parameters. The proposed model shows accurate predictive ability for stress and configuration parameters of wrinkles, and a general calculation procedure for wrinkle parameters of complex membranes is established.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Physical
Erwan Hafizi Kasiman, Ahmad Beng Hong Kueh, Airil Yasreen Mohd Yassin, Norsarahaida Saidina Amin, Mugahed Amran, Roman Fediuk, Evgenii Vladimirovich Kotov, Gunasekaran Murali
Summary: The article presents a mixed finite element formulation for examining biomagnetic fluid dynamics and simulates the flow of blood in a straight rectangular conduit with changing magnetic distribution. The model accurately exhibits the formation and distribution of vortices, temperature, and skin friction.
Article
Chemistry, Physical
Wei Quan Chin, Yeong Huei Lee, Mugahed Amran, Roman Fediuk, Nikolai Vatin, Ahmad Beng Hong Kueh, Yee Yong Lee
Summary: To reduce carbon footprint in the brick production industry, using agricultural-industrial waste to make sustainable bricks has become a new trend in research and application. This paper investigates the properties of different agricultural-industrial wastes and optimizes the mixture design. Although the strength-to-weight ratio of the waste bricks is lower than conventional bricks, they have better late strength development and meet the standards for construction industry.
Article
Engineering, Civil
Mohamad Shazwan Ahmad Shah, Ahmad Beng Hong Kueh, Mohd Nasir Tamin, Jang-Ho Jay Kim, Mariyana Aida Ab Kadir, Nordin Yahaya, Norhazilan Md Noor
Summary: This article investigates the influence of critical distance theory on the fatigue characteristics of concrete under different water-cement ratios and finds that the variation in water-cement ratio has a significant impact on the fatigue limit of concrete. Currently, there is limited research on the fatigue limits of concrete and comparisons between different mixtures.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Yi Xuan Tang, Yeong Huei Lee, Mugahed Amran, Roman Fediuk, Nikolai Vatin, Ahmad Beng Hong Kueh, Yee Yong Lee
Summary: This study predicts the compressive strength of alkaline-activated slag concrete (AASC) using an artificial neural network (ANN) model and identifies the key input parameters that influence the AASC compressive strength through a sensitivity analysis, demonstrating the high accuracy of the ANN model in predicting the compressive strength of AASC.
Article
Chemistry, Physical
Ibrahim Yakub, Ahmad Beng Hong Kueh, Edwin Andres Pineda De la O, Md Rezaur Rahman, Mohamad Hardyman Barawi, Mohammad Omar Abdullah, Mugahed Amran, Roman Fediuk, Nikolai Ivanovich Vatin
Summary: This study investigates the effects of copper and iron oxide crystallite size on the performance of catalysts in reducing nitrogen oxides. It reveals that the copper-to-iron ratio affects the crystal phases and size distribution over the carbon support. Predictive equations are developed using an artificial neural network technique for the prediction of NOx conversion and N-2 selectivity. The model is highly applicable at operating temperatures of 250-300 degrees C.
Retraction
Construction & Building Technology
Rayed Alyousef, Hossein Mohammadhosseini, Ahmed Farouk Deifalla, Shek Poi Ngian, Hisham Alabduljabbar, Abdeliazim Mustafa Mohamed
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Proceedings Paper
Construction & Building Technology
Khea Siang Teoh, Hean Seong Tan, Poi Ngian Shek, Rosli Mohamad Zin, Siti Asma Abd Latif
Summary: The weight of steel structure is important in reducing construction cost, and designing with optimized weight is a basic strategy. This paper conducts a parametric study on truss girder design using rectangular hollow section (RHS) according to Eurocode 3. The results show that the weight of truss girder is proportional to the span, and a higher steel grade can reduce the weight.
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2023)
Proceedings Paper
Construction & Building Technology
Yong Sheng Goh, Hean Seong Tan, Poi Ngian Shek, Rosli Mohamad Zin, Siti Asma Abd Latif
Summary: This paper presents the compression resistance of short cold-formed lipped C channel section after reinforcement with a web stiffener, and investigates the failure modes of the reinforced section under axial compression load. The comparison between columns with and without stiffener is made in terms of ultimate load capacity and failure mode. The experimental results show that the compression resistance of the column with web stiffener has significantly increased.
ADVANCES IN CIVIL ENGINEERING MATERIALS
(2023)
Article
Polymer Science
Rayed Alyousef, Ahmed Abdel Khalek Ebid, Ghasan Fahim Huseien, Hossein Mohammadhosseini, Hisham Alabduljabbar, Shek Poi Ngian, Abdeliazim Mustafa Mohamed
Summary: Geopolymer mortars (GPMs) as concrete repairing materials, with their eco-friendly properties and excellent mechanical performance, are explored in this study. A new ternary blend of GPMs is proposed, composed of waste ceramic tiles, fly ash, and ground blast furnace slag. The GPMs show enhanced bond strength, mechanical characteristics, and durability performance when exposed to aggressive environments.
Article
Engineering, Marine
Alba Ricondo, Laura Cagigal, Beatriz Perez-Diaz, Fernando J. Mendez
Summary: This research presents a site-specific metamodel based on the SWASH numerical model simulations, which can predict coastal hydrodynamic variables in a fast and efficient manner. The metamodel uses downscaled and dimensionality reduced synthetic database to accurately reproduce wave setup, wave heights associated with different frequency bands, and wave runup. This method has great potential in coastal risk assessments, early warning systems, and climate change projections.
Article
Engineering, Marine
Xiao Yu, Wangjun Ren, Bukui Zhou, Li Chen, Xiangyun Xu, Genmao Ren
Summary: This study investigated and compared the compression responses and energy absorption capacities of coral sand and silica sand at a strain rate of approximately 1000 s-1. The results showed that coral sand had significantly higher energy absorption capacity than silica sand due to its higher compressibility. The study findings suggest that using poorly graded coral sand can improve its energy absorption capacity.
Article
Engineering, Marine
Jingxi Zhang, Junmin Mou, Linying Chen, Pengfei Chen, Mengxia Li
Summary: This paper proposes a cooperative control scheme for ship formation tracking based on Model Predictive Control. A predictive observer is designed to estimate the current motion states of the leader ship using delayed motion information. Comparative simulations demonstrate the effectiveness and robustness of the proposed controller.
Article
Engineering, Marine
Yu Yao, Danni Zhong, Qijia Shi, Ji Wu, Jiangxia Li
Summary: This study proposes a 2DH numerical model based on Boussinesq equations to investigate the impact of dredging reef-flat sand on wave characteristics and wave-driven current. The model is verified through wave flume experiments and wave basin experiments, and the influences of incident wave conditions and pit morphological features on wave characteristics are examined.
Article
Engineering, Marine
Jayanta Shounda, Krishnendu Barman, Koustuv Debnath
Summary: This study investigates the double-average turbulence characteristics of combined wave-current flow over a rough bed with different spacing arrangements. The results show that a spacing ratio of p/r=4 offers the highest resistance to the flow, and the double-average Reynolds stress decreases throughout the flow depth. The advection of momentum-flux of normal stress shows an increase at the outer layer and a decrease near the bed region after wave imposition. Maximum turbulence kinetic energy production and diffusion occur at different layers. The turbulence structure is strongly anisotropic at the bottom region and near the outer layer, with a decrease in anisotropy observed with an increase in roughness spacing.
Article
Engineering, Marine
Meng Zhang, Lianghui Sun, Yaoguo Xie
Summary: The research proposes a method for online identification of wave bending and torsional moment in hull structures. For structures without large openings, the method optimizes sensor positions and establishes a mathematical model to improve accuracy. For structures with large openings, a joint dual-section monitoring method is proposed to simultaneously identify bending and torsional moments in multiple key cross sections.
Article
Engineering, Marine
Longming Chen, Shutao Li, Yeqing Chen, Dong Guo, Wanli Wei, Qiushi Yan
Summary: This study investigated the dynamic response characteristics and damage modes of pile wharves subjected to underwater explosions. The results showed that the main damaged components of the pile wharf were the piles, and inclined piles had a higher probability of moderate or more significant damage compared to vertical piles. The study also suggested that replacing inclined piles with alternative optimized structures benefits the blast resistance of pile wharves.
Article
Engineering, Marine
I. -C Kim, G. Ducrozet, V. Leroy, F. Bonnefoy, Y. Perignon, S. Bourguignon
Summary: Previous research focused on the accuracy and efficiency of short-term wave fields in specific prediction zones, while we developed algorithms for continuous wave prediction based on the practical prediction zone and discussed important time factors and strategies to reduce computational costs.
Article
Engineering, Marine
Hang Xie, Xianglin Dai, Fang Liu, Xinyu Liu
Summary: This study investigates the load characteristics of a three-dimensional stern model with pitch angle through a drop test, and reveals complex characteristics of pressure distribution near the stern shaft. The study also shows that the vibration characteristics of the load are influenced by the drop height and pitch angle, with the drop height having a greater effect on the high-frequency components.
Article
Engineering, Marine
Hangyuan Zhang, Wanli Yang, Dewen Liu, Xiaokun Geng, Wangyu Dai, Yuzhi Zhang
Summary: The deep-water bridge is more vulnerable to earthquake damage than the bridge standing in air. The larger blocking ratio has a significant impact on the added mass coefficient, which requires further comprehensive study. The generation mechanism of block effect is analyzed using numerical simulation software ANSYS Fluent. The results show that the recirculation zone with focus reduces the pressure on the back surface of the cylinder, resulting in the peak value of in-line force not occurring synchronously with the peak value of acceleration. The change in position and intensity of the recirculation zone with focus, as well as the change in water flow around the cylinder surface, are identified as the generation mechanism of the block effect, which has a 10% influence on the hydrodynamic force. The changing rule of the added mass coefficient with blocking ratio is discussed in detail, and a modification approach to the current added mass coefficient calculation method is suggested. Physical experiments are conducted to validate the modification approach, and the results show that it is accurate and can be used in further study and real practice.
Article
Engineering, Marine
Golnesa Karimi-Zindashti, Ozgur Kurc
Summary: This study examines the performance of an in-house code utilizing a deterministic vortex method on the rotation of circular and square cylinders. The results show that rotational motion reduces drag forces, suppresses fluctuating forces, and increases lift forces. The code accurately predicts vortex shedding suppression and identifies the emergence of near-field wakes in the flow over rotating square cylinders.
Article
Engineering, Marine
George Dafermos, George Zaraphonitis
Summary: The survivability of damaged ships is of great importance and the regulatory framework is constantly updated. The introduction of the probabilistic damage stability framework has rationalized the assessment procedure. Flooding simulation tools can be used to investigate the dynamic response of damaged ships.
Article
Engineering, Marine
Xuyue Chen, Xu Du, Chengkai Weng, Jin Yang, Deli Gao, Dongyu Su, Gan Wang
Summary: This paper proposes a real-time drilling parameters optimization method for offshore large-scale cluster extended reach drilling based on intelligent optimization algorithm and machine learning. By establishing a ROP model with long short-term memory neurons, and combining genetic algorithm, differential evolution algorithm, and particle swarm algorithm, the method achieves real-time optimization of drilling parameters and significantly improves the ROP.
Article
Engineering, Marine
Sung-Jae Kim, Chungkuk Jin, MooHyun Kim
Summary: This study investigates the dynamic behavior of a moored submerged floating tunnel (SFT) under tsunami-like waves through numerical simulations and sensitivity tests. The results show that design parameters significantly affect the dynamics of the SFT system and mooring tensions, with shorter-duration and higher-elevation tsunamis having a greater impact.
Article
Engineering, Marine
G. Clarindo, C. Guedes Soares
Summary: Environmental contours are constructed using the Inverse-First Order Reliability Method based on return periods. The paper proposes the use of the Burr distribution to model the marginal distribution of long-term significant wave heights. The newly implemented scheme results in different environmental contours compared to the reference approach.