Article
Materials Science, Multidisciplinary
Wei Yuan, Yanqing Kou, Zhaokang Meng, Shengli Zhu
Summary: A novel honeycomb with arc-curved edge is proposed to enhance the out-of-plane mechanical performance. The impact performance and crashworthiness of the honeycomb are investigated and discussed. Results show that the honeycomb with relatively large central angle has the best crashworthiness performance due to its better energy absorption ability and structural balance.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Mihaela Iftimiciuc, Arne Derluyn, Jochen Pflug, Dirk Vandepitte
Summary: Honeycomb cores are widely used in various industries to build advanced lightweight structures that take advantage of high stiffness-to-weight and strength-to-weight ratios. This study focuses on the compressive behavior of a novel hierarchical sandwich honeycomb core, both in virtual and experimental testing. The finite element model is validated and can be used for further structural optimization. The comparison between the proposed hierarchical structure and conventional expanded honeycombs highlights the advantages of structural hierarchy, showing a high potential for use in the construction of sandwich panels and parts.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Engineering, Civil
Yan Yang, Hua Liu, Qiao Zhang, Jingxuan Ma, Xianfeng Yang, Jialing Yang
Summary: This paper proposes a novel super hexagonal honeycomb (SHH) structure and investigates its energy absorption capacity through experimental and numerical methods. The results show that the SHH exhibits significantly better impact protection performance compared to traditional hexagonal honeycomb. This research can inspire further studies on lightweight edge-based honeycombs with excellent energy absorption capacity.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zhenzhen Cai, Xiaolin Deng, Cuiping Huang, Zhaoping Xie
Summary: A novel bioinspired hexagonal honeycomb (NBHH) with saw-tooth corrugated shape is proposed in this paper. Experimental verification and comparative analysis are conducted to evaluate the energy absorption capability of the NBHH. The results show that the NBHH exhibits excellent energy absorption compared to conventional honeycomb (CH) and bionic honeycomb sandwich panel (BHSP) with sinusoidal curves. The specific energy absorption of the NBHH is 58.60% higher than that of the CH with the same wall thickness, and 7.23% higher than that of the BHSP.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Ruochao Zhao, Bo Yuan, De Zhou, Zheliang Li, Ming Zhao, Yong Tao
Summary: Hierarchical design and gradient design are effective in improving the crashworthiness of honeycombs. This study proposes a novel graded hierarchical hexagonal honeycomb (GHHH) by introducing wall thickness variation into the vertex-based hierarchical hexagonal honeycomb (VHHH). Numerical simulations and theoretical analysis are used to study the crashworthiness performance of GHHH under out-of-plane impact. The findings provide effective guidelines for the design of honeycombs with enhanced crashworthiness.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
H. Shahverdi Moghaddam, S. R. Keshavanarayana, D. Ivanov, C. Yang, A. L. Horner
Summary: In this study, experimental shear tests were conducted using a custom-built picture-frame shear fixture to investigate the in-plane pure-shear response of an HRP-C fiberglass/phenolic hexagonal honeycomb core under large deformation. A new hyperelastic orthotropic material model was developed to accurately capture the in-plane finite strain behavior of the honeycomb core, showing good agreement with test data. The model outperformed the traditional Hookean orthotropic material model, which exhibited softer responses compared to the experimental results.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Sisi Lu, Weitao Ni, Pan Wang, Kaibo Yan, Zhaowei Chen, Xiaolu Cui, Yayun Qi
Summary: An impact finite element model was used to investigate the effects of cell wall thickness, initial impact velocity, and impact direction on the deformation modes and crush characteristic of hexagonal honeycomb structures. The results showed that the structure compressed differently depending on the impact direction, with inward shrinkage occurring in transverse and longitudinal plane impacts, and no inward shrinkage in 60° oblique plane impacts. Empirical formulas for predicting the initial peak force and specific energy absorption were obtained and found to have errors within 10% of the simulation results, indicating their usefulness in crashworthiness predictions for hexagonal honeycomb structures.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Engineering, Civil
Lijia Guo, Hongcui Wang, Weijie Li, Mengshan Zhang, Yue Qiu, Zhijia Liu, Zhongwei Zhang
Summary: In this study, a novel carbon/carbon (C/C) honeycomb structure is proposed for high-resolution spacecraft that requires ultra-high stability and light-weight optical structures. The C/C honeycomb is fabricated using chemical vapor infiltration (CVI) processing with a continuous carbon fiber preform. The mechanical and damage behavior of the C/C honeycomb is described by a multi-scale damage model, which includes a damage model and constitutive model at both mesoscale and macro-scale. The study comprehensively investigates the effects of yarn orientation, side length, wall thickness, and height of the C/C honeycomb on its shear characteristics and damage modes. The research contributes to the design and optimization of optical-mechanical structures in high-resolution spacecraft.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
H. Tankasala, V. S. Deshpande, N. A. Fleck
Summary: Exact solutions are derived for the small-strain, in-plane, elasto-plastic response of a hexagonal honeycomb using slender beam theory. The study explores the macroscopic shear compliance and low shear strength of the incompressible hexagonal honeycomb, as well as the elevated tensile modulus and strength due to bar stretching. Explicit analytical formulae are obtained for the macroscopic tensile modulus and strength of the incompressible honeycomb.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Automation & Control Systems
Mohamed Jaafar, Mohammed Nouari, Hamid Makich, Abdelhadi Moufki
Summary: Machining of Nomex(R) honeycomb materials is a significant challenge in the industry due to the complex geometry of the honeycomb structure and the difficulties associated with the thin walls of the material. Numerical modeling using different orthotropic approaches and failure criteria helps to understand the machining process. The interaction between the cutting tool and the honeycomb walls, as well as the different stages of chip formation, are carefully modeled and validated through experiments.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Civil
B. Alanbay, R. C. Batra
Summary: In this study, a surrogate optimization algorithm and numerical technique were used to analyze the dynamic deformations of sandwich structures with fiber-reinforced face sheets. The goal was to minimize the structural mass and maximize its blast mitigating capabilities. Simulation results showed that the mass density and elastic modulus of the core layers did not continuously vary through the thickness.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Manufacturing
Xiang Li, Xingxing Xu, Yanmiao Wang, Ruibo He
Summary: This study proposed a new combined quasi-honeycomb core and investigated its out-of-plane crashworthiness. The results showed that the new structure exhibited superior energy absorption and crushing force efficiency compared to conventional honeycomb cores. Additionally, a theoretical prediction model for the axial average crushing force was established, and the effect of structural parameters on crashworthiness was studied.
INTERNATIONAL JOURNAL OF CRASHWORTHINESS
(2022)
Article
Materials Science, Multidisciplinary
J. Carlsson, K. Li, V. S. Deshpande, N. A. Fleck
Summary: Finite strain numerical solutions were used to study the elastic-plastic behavior of a hexagonal honeycomb under uniaxial compression and tension. The study found that the inclination angle of the cell walls and the characteristics of the core material significantly affect the response of the honeycomb.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Civil
Jiayue Zhai, Dingguo Zhang, Meng Li, Chengbo Cui, Jianguo Cai
Summary: This study investigated the energy-absorption characteristics of origami honeycombs in the out-of-plane crushing process. The results showed that origami honeycombs have a more stable folding process and predictable deformation mode. The theoretical model deduced using the super-folding method was found to be accurate, with an error between the theoretical and simulation results ranging from -8.55% to 6.50%.
THIN-WALLED STRUCTURES
(2022)
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
Polymer Science
Safdar Ali Khan, Seyed Saeid Rahimian Koloor, Wong King Jye, Geralt Siebert, Mohd Nasir Tamin
Summary: A fatigue damage model is developed to quantify the mechanics of interlaminar damage in fiber-reinforced polymer composite structures under fluctuating stresses. The model considers degradation of interlaminar elastic properties and dissipation of fracture energy. The model is validated through a case study of a carbon-fiber-reinforced polymer laminate, showing good agreement with experimental data.
Review
Polymer Science
Hossein Mohammadi, Zaini Ahmad, Saiful Amri Mazlan, Mohd Aidy Faizal Johari, Geralt Siebert, Michal Petru, Seyed Saeid Rahimian Koloor
Summary: The production of lightweight vehicles is driven by the global challenges of fuel economy enhancement and greenhouse gas emissions reduction. Lightweight materials, such as fiber-reinforced plastics (FRP) composites, are being developed to replace conventional materials like steel and cast iron to achieve fuel efficiency and CO2 emission reduction. However, the damage of FRP composites under impact loading is a critical factor that affects their structural application. This paper focuses on the use of high-strength glass fibers as the reinforcing member to develop a car bumper beam, discussing its mechanical performance and manufacturing techniques. Based on literature studies, glass fiber-reinforced composite (GRP) shows more promise in the automotive industry compared to conventional car bumper beams.
Review
Materials Science, Multidisciplinary
Hossein Mohammadi, Zaini Ahmad, Michal Petru, Saiful Amri Mazlan, Mohd Aidy Faizal Johari, Hossein Hatami, Seyed Saeid Rahimian Koloor
Summary: Crashworthiness is the ability of a vehicle to protect its occupants from serious injuries in a collision. The proper design of lightweight energy absorption components, such as honeycomb structures, can enhance occupant safety and reduce fuel consumption. This work introduces the criteria of crashworthiness and nature-bioinspired cellular structures, discusses various classifications of advanced honeycomb design, and emphasizes the advantageous effect of different designs on crashworthiness. The importance of potential design to enhance the crashworthy performance of honeycomb structures is summarized, providing a good understanding for the architectural design of advanced honeycomb-based structures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Chemical
Safdar Ali Khan, Seyed Saeid Rahimian Koloor, Wong King Jye, Noorfaizal Yidris, Ab Aziz Mohd Yusof, Mohd Al Fatihhi Mohd Szali Januddi, Mohd Nasir Tamin, Mahzan Johar
Summary: Adhesive bonding can join two different substrate materials together by forming chemical bonds. The mechanical properties of the adhesive material can easily change due to the loading rate and deformation mode. This study aims to evaluate the strain rate effect on the damage response of adhesive joints for Mode I loading scenarios. The experimental and FE simulation results show a good correlation.
Article
Engineering, Mechanical
Mudassar H. Hashmi, Mohd F. Abdul-Hamid, Mohd N. Tamin
Summary: Despite controlled test procedures, fatigue crack growth data still exhibits statistical variation. To address the lack of such a database, this study proposes a probabilistic model based on Walker's crack growth rate equation, considering variability in stress intensity factor range (AK) and stress ratio (R). The model's parameters are estimated using maximum likelihood estimation (MLE) method, and it is validated using measured fatigue crack growth curves of aluminum alloys 7075-T6 and 2024-351. The model accurately predicts fatigue crack growth under replicate and variable R-ratio loadings.
PROBABILISTIC ENGINEERING MECHANICS
(2023)
Review
Chemistry, Multidisciplinary
Michal Petru, Azam Ali, Amir Sohail Khan, Pavel Srb, Lubos Kucera, Jiri Militky
Summary: Pleasant interior conditions and comfort are essential for drivers to maintain vital body functions during driving. Inbuilt heating systems in car seats not only provide sufficient heat but also minimize energy consumption. Conductive textiles are proposed to evenly distribute heat, and this study is important for future trends of reducing energy consumption and carbon emissions.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Marine
Hamidreza Ghandvar, Mostafa Abbas Jabbar, Michal Petru, Tuty Asma Abu Bakar, Lim Jia Ler, Seyed Saeid Rahimian Koloor
Summary: This study investigated the effect of yttria-stabilized zirconia (YSZ) on the microstructural alterations, mechanical properties, sliding wear behavior, and corrosion properties of Al-15%Mg2Si composites. Different content of YSZ (0, 3, 6, and 9 wt.%) was added to the Al-15%Mg2Si composites. The results showed that the size and aspect ratio of Mg2Si particles decreased with the addition of YSZ. The hardness value increased with the addition of YSZ, and the Al-15%Mg2Si-9%YSZ composite showed the best wear resistance and corrosion resistance.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Editorial Material
Environmental Studies
Neave O'Clery, Juan Carlos Duque, Seraphim Alvanides, Tim Schwanen
ENVIRONMENT AND PLANNING B-URBAN ANALYTICS AND CITY SCIENCE
(2023)
Article
Materials Science, Textiles
Hafiz Faisal Siddique, Adnan Ahmed Mazari, David Cirkl, Engin Akcagun, Abdurrahim Yilmaz, Musaddaq Azeem, Michal Petru, Ivan Masin
Summary: Compression pressure exertion is important for compression socks and can be influenced by materials and machine adjustments. These socks work by applying the highest pressure at the ankle and gradually decreasing it towards the calf. They are used for preventing and treating venous disorders, ranging from minor valve incompetence to chronic ulcers. The tensile characteristics of compression socks directly impact their productivity, effectiveness, and working life.
JOURNAL OF INDUSTRIAL TEXTILES
(2023)
Article
Computer Science, Artificial Intelligence
Nesrine Amor, Muhammad Tayyab Noman, Michal Petru, Neethu Sebastian, Deepak Balram
Summary: This study investigates the effect of a newly developed metaheuristic algorithm on the machinability and surface roughness of nano zinc oxide embedded glass fiber reinforced polymer composites. The hybrid Grey-WSO algorithm combines grey theory and white shark optimizer to find the optimal responses. The results demonstrate the potential of the developed algorithm in machining composite materials and highlight the significant influence of nanoparticle amount on surface roughness calculations.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)