Article
Materials Science, Composites
Leipeng Liu, Haochen Yun, Kangning Zhang, Zhe Ji, Jinru Liu, Shenghua Lv, Shaobo Tan
Summary: Dielectric elastomers, such as the aluminum hydroxide@graphene oxide (Al(OH)(3)@GO)/PDMS composite, show excellent performance and can be used as the next generation drives due to their ability to undergo reversible deformation under external electric fields. The presence of insulating Al(OH)(3) layer in the composite helps impede conductive pathways and leakage currents, resulting in a high dielectric constant value and improved actuated strain under low electric fields.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Composites
Kirk Ming Yeoh, Leong Hien Poh, Tong-Earn Tay, Vincent Beng Chye Tan
Summary: In finite element analyses, composite laminates are often homogenised and modelled using beam and plate elements. However, these structural elements are inaccurate for laminates with distinct in-plane stiffnesses, such as sandwich structured composites. To address this issue, a multiscale layerwise beam model based on the Timoshenko-Ehrenfest beam theory is proposed, which captures the key deformation modes of bending and transverse shear. The model is implemented using Direct FE2, a versatile computational homogenisation scheme that also captures deformation mechanisms at the mesoscale. The proposed approach provides accurate macroscale responses and resolution to mesoscale deformations in significantly less computation time.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xujiao Lv, Jinjun Liu, Jinghao Zhao, Mingkun Wang, Zhongbin Pan
Summary: In this study, BaTiO3-PVDF/CoFe2O4-PVDF/BaTiO3-PVDF composite materials were designed and fabricated. The microstructure, dielectric, ferroelectric, magnetic, and magnetodielectric properties were systematically investigated. Enhanced ferroelectricity, high energy density, significant magnetic properties, and magnetodielectric response were observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Composites
Xiaoyan Zeng, Ting Tang, Jiaxuan An, Xiaoxiang Liu, Hongxia Xiang, Youbing Li, Chaolong Yang, Tian Xia
Summary: The research focused on the influence of isocyanate content on the mechanical properties of polyurethane matrix, as well as the impact of n-pentane as a foaming agent on RPUF and sandwich structure composite mechanical properties. The sandwich structure composites prepared through the PU prepolymer method showed excellent comprehensive performance.
POLYMER COMPOSITES
(2021)
Article
Engineering, Manufacturing
Kexin Chen, Yuezhan Feng, Yongqian Shi, Hengrui Wang, Libi Fu, Miao Liu, Yuancai Lv, Fuqiang Yang, Bin Yu, Minghua Liu, Pingan Song
Summary: This research focuses on the development of thermoplastic polyurethane composites with outstanding flame retardancy and electromagnetic interference shielding effectiveness. A novel air-assisted thermocompression technology was used to fabricate sandwich-structured composites. The composites exhibited significant reduction in heat release rate and smoke release rate, as well as high electromagnetic interference shielding effectiveness.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Polymer Science
Pooria Khalili, Mikael Skrifvars, Hom Nath Dhakal, Saeid Hosseinpour Dashatan, Mikael Danielsson, Alexia Feiner Gracia
Summary: Sandwich composites consisting of regenerated cellulose fabric and bio-based polypropylene as facings, as well as virgin and recycled polyamide textiles as core materials, were produced using compression moulding techniques. The addition of thicker recycled textile improved the bending stiffness and peak flexural force. Substituting one layer of recycled textile for two layers of virgin material provided good impact energy absorption capacity and maximum force. Tensile strength varied among the different composite materials, but no evidence of fiber tow debonding, fiber bundle splitting, or delamination was observed.
Article
Materials Science, Ceramics
Wenqi Xie, Xicheng Cao, Biao Zhang, Zhilei Wei, Bangzhi Ge, Zhichao Xiao, Qun Li, Zhongqi Shi
Summary: Inspired by the structures of plant cells, WC-coated MCMB powders were prepared by molten salt synthesis and then densified by spark-plasma sintering to obtain biomimetic cellular-structured MCMB@WC composites. The in-situ formed WC cytoderm significantly contributed to the densification of the composites. The composite with a WC concentration of 53 vol% exhibited the maximal bending strength and fracture toughness of 446 MPa and 4.48 MPa m1/2, respectively.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Chenglin Li, Qingyuan Du, Changhao Liu, Yi An, Ying Liu, Xiuting Zheng, Yue Ru, Dali Gao, Daming Wu, Jingyao Sun
Summary: Due to the rapid development of multifunctional and miniaturized electronic devices, the demand for polymer composites with mechanical properties, high-thermal conductivity, and dielectric properties is increasing. Researchers have reported a glass fabric/boron nitride network formed using polyvinyl alcohol as an adhesive, which is further modified for better thermal conductivity enhancement. The resulting laminated composites show improved thermal conductivity, mechanical properties, electrically insulating properties, and dielectric properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Heesook Lee, Donghwan Cho
Summary: Carbon fiber/ABS composites with different acrylonitrile, butadiene, and styrene components were produced using extrusion/injection and long fiber thermoplastic (LFT)/injection molding processes. The composites produced with LFT pellets showed higher mechanical properties compared to those produced with extruded pellets. The mechanical properties, such as tensile, flexural, and impact strength, were influenced by the components, with ABS750sw showing the most significant improvement. The reinforcing effect of longer fiber length distribution and higher fiber aspect ratio in the composites with LFT pellets contributed to the increased mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Multidisciplinary
Yun Lu Tee, H. Nguyen-Xuan, Phuong Tran
Summary: This paper investigates the bending behavior of porcupine quills and bioinspired Voronoi sandwich panels, aiming to understand the influence of geometrical design on their bending performance. X-ray micro-computed tomography is used to examine the internal morphology of the quill, revealing a functionally graded structure. Inspired by this, Voronoi sandwich panels are designed with Voronoi seed distribution and gradient transition configurations. Experimental results and simulations show that the graded panels exhibit better bending performance than the uniform panels. This study provides valuable insights for engineering applications in aerospace and automobile industries.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Chemistry, Physical
Chao Chen, Yunchuan Xie, Meirong Zhang, Jing Li, Xiaoyong Wei, Zhicheng Zhang
Summary: A new sandwich-structured composite material has been developed, which shows improved breakdown strength and electrical polarization, resulting in a significant increase in discharged energy density.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Composites
Zixuan Chen, Tianyu Yu, Yun-Hae Kim, Zetian Yang, Yan Li, Tao Yu
Summary: This study aims to investigate the mechanical properties of basalt fiber reinforced polymers (BFRPs) with the incorporation of different structured nanoclays, and to improve their interfacial bonding through experimental methods. The results show that a flattened nanoclay structure is more effective for enhancing the modulus, and the inclusion of different structured nanoclays also improves the interlaminar strength and toughness of BFRPs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
O. Fashanu, M. Rangapuram, A. Abutunis, J. Newkirk, K. Chandrashekhara, H. Misak, D. Klenosky
Summary: Sandwich composite structures with TPMS cellular cores were investigated for their feasibility, and mechanical tests were performed to compare the performance of different structures. The results showed changes in compressive strength, shear yield stress, and impact resistance when non-traditional cores were used in comparison to traditional honeycomb cores.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Mechanics
Ben Wang, Qu Yan, Cuiping Bai, Yunze Yang, Hualin Fan
Summary: Single-layered, double-layered, and three-layered woven lattice sandwich-ply (WLS) composites were designed and manufactured in this research. Bending experiments were conducted on clamped and simply-supported WLS panels to investigate the effects of multi-layered construction and boundary constraints on flexural behaviors. The results revealed typical damage modes for panels with four constrained ends including core fracture, face shear fracture, and bending fracture, while panels with two constrained ends showed core shear, compression fracture, and face fracture. The study demonstrated that multi-layered construction significantly improved strength, stiffness, and energy absorption, and the influence of boundary constraint on deformation characteristics decreased with increasing core shear stiffness.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Lin Pan, Wenbo Gao, Ruitian Bo, Yanpeng Li, Chunfeng Wang, Yongliang Wang, Zhidong Han
Summary: In order to meet the diversified requirements for polymer-based composites in modern electronic devices and electrical systems, the simultaneous enhancement of thermal-electrical-mechanical properties is a great challenge. The gradient structured composites, designed by adjusting the distribution of temperature, electric and stress fields in polyethylene (PE) based composites with different Al2O3 contents, demonstrated superior through-plane thermal conductivity, high breakdown strength, and good tensile strength. Finite element simulation provided evidence for the action mechanism on gradient structure regulating temperature and electric field. The strategy of constructing gradient structure provides a feasible route to meet the comprehensive performance requirements of PE based composites in massive manufacture scenario for practical insulation applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Mechanics
Andrzej Komorek, Robert Szczepaniak, Pawel Przybylek, Aneta Krzyzak, Jan Godzimirski, Marek Roskowicz, Dominika Seremak
Summary: The use of composite materials in air transport construction has been of interest for decades due to the need for minimizing weight and reducing costs. Vectran fibers, a less commonly used reinforcement fiber, have been studied for their potential applications in aircraft constructions. Research shows that adding carbon fibers can improve the impact strength and mechanical properties of Vectran fiber-reinforced composites.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Robert Szczepaniak, Grzegorz Kozun, Pawel Przybylek, Andrzej Komorek, Aneta Krzyzak, Grzegorz Woroniak
Summary: The study focused on new materials with high thermal protective properties, modified with ablative thermoprotective properties and tested under high temperatures. Experimental results showed a clear downward trend in temperature rise for hybrid composites modified with powder additives compared to samples without powder additives.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Wojciech Zurowski, Jaroslaw Zepchlo, Aneta Krzyzak, Edwin Gevorkyan, Miroslaw Rucki, Elzbieta Siek, Anita Bialkowska
Summary: This study investigates the effects of adding different percentages of quartz powder on the performance of glass fiber reinforced composites. The results show that increasing the quartz powder addition does not significantly enhance the mechanical properties of the composite, and there is no clear trend for the effect of silica filler percentage on the composite performance. Individual purpose-dependent decision making is necessary in the design of glass fiber reinforced composites with quartz powder filler.
Article
Chemistry, Physical
Martyna Roszowska-Jarosz, Joanna Masiewicz, Marcin Kostrzewa, Wojciech Kucharczyk, Wojciech Zurowski, Justyna Kucinska-Lipka, Pawel Przybylek
Summary: The research aimed to enhance the mechanical properties of epoxy composites by adding a small amount of nanocellulose. Results showed significant improvements in impact strength, critical stress intensity factor, and stress at break with nanocellulose addition. The study suggests that even a small quantity of nanofiller can effectively improve the performance of composites and increase economic efficiency in the preparation process.
Article
Chemistry, Physical
Ewelina Kosicka, Aneta Krzyzak, Mateusz Dorobek, Marek Borowiec
Summary: This article established a predictive model based on experimental data and selected the optimal architecture through five-fold validation, which showed high accuracy.
Article
Chemistry, Physical
Ewelina Kosicka, Marek Borowiec, Marcin Kowalczuk, Aneta Krzyzak
Summary: The study aims to analyze the effect of physical modifiers with different granularity and mass percentage on the dynamics of aerospace polymer composites, and the results demonstrate that the density and grain size of the modifier can alter the properties of the composite materials.
Article
Polymer Science
Andrzej Komorek, Pawel Przybylek, Robert Szczepaniak, Jan Godzimirski, Marek Roskowicz, Szymon Imilowski
Summary: Composite materials, especially sandwich composites, are widely used in the construction of means of transport due to their low density and high stiffness. This study conducted static and dynamic tests to investigate the effect of density and core thickness on the mechanical properties of sandwich composites. The results showed that the core material significantly influenced the strength parameters of the composites, and different polymer foam cores had different adhesive properties. Thicker cores with higher density were found to improve the impact strength and puncture resistance of the sandwich composites.
Article
Chemistry, Physical
Zivile Decker, Vitalijus Rudzinskas, Kazimierz Drozd, Jacek Caban, Jurijus Tretjakovas, Aleksander Nieoczym, Jonas Matijosius
Summary: With the rapid development of the road transport industry, trucks with semi-trailers have become the main means of transporting goods by road. The construction of trailer and semi-trailer axles is crucial due to the added static and dynamic loads during operation. This article analyzes the damage to the rear axle of a semi-trailer using macroscopic observations and dynamic FEA to determine the probable cause.
Article
Chemistry, Multidisciplinary
Kazimierz Drozd, Slawomir Tarkowski, Jacek Caban, Aleksander Nieoczym, Jan Vrabel, Zbigniew Krzysiak
Summary: This paper presents the results of an analysis of a road accident involving a truck and two passenger cars, verifying the hypothesis that the incident occurred after the truck's front wheel was damaged. The study reveals that the tire crack was a result of material defects, and the tire rupture and corrosion of the steel cord were likely due to the cracking of the rubber layer and moisture ingress or the use of corroded steel cord wires during tire production.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Daniel Pieniak, Agata M. M. Niewczas, Konrad Pikula, Leszek Gil, Aneta Krzyzak, Krzysztof Przystupa, Pawel Kordos, Orest Kochan
Summary: This study compared the effects of aging in artificial saliva and thermal shocks on the microhardness of nanohybrid composite and bulk-fill composite. The results showed that after thermocycling and 25 months of aging, the microhardness of the nanohybrid composite decreased by approximately 12-15%, while the bulk-fill composite decreased by approximately 22-24%. Additionally, the nanohybrid composite had a lower initial hardness than the bulk-fill composite, but it showed a lower relative reduction in hardness of approximately 10%.
Article
Polymer Science
Andrzej Komorek, Robert Szczepaniak, Pawel Przybylek, Kacper Komorek, Zenon Komorek, Jan Godzimirski, Andrzej Zbrowski
Summary: The research modified the basic adhesive composition to estimate the effect of fatigue loading on the temperature of the adhesive material. The temperature of the materials was recorded using a thermal imaging camera and a thermoelectric thermometer. An increase in the number of load cycles corresponded to an increase in the temperature of most tested materials at 20 Hz, while a decrease in temperature was observed for modified samples at a frequency of 30 Hz after a certain value. Fatigue loading caused an increase in the temperature of all tested polymeric materials. The use of a thermal imaging camera allowed for simple identification of areas with the highest temperature during testing, providing more practical use compared to thermocouple thermometers.
