Article
Materials Science, Multidisciplinary
Huan Ma, Siyue Xu, Yang Gao, Wei Liu, Xiaoxiao Wei, Mohamed Amine Aouraghe, Fujun Xu
Summary: This study demonstrated an innovative physical strategy of wet cryogenic treatment to improve the properties of porous CNT assembly, leading to enhanced tensile strength, toughness, and strain sensitivity.
Article
Polymer Science
Anne M. Gohn, Xiaoshi Zhang, Alexander McHale, Rene Androsch, Alicyn M. Rhoades
Summary: Carbon nanotubes exhibit a powerful nucleating effect on the crystallization kinetics of polyamide 66, accelerating the process significantly. Moreover, flow-induced effects, such as shear work introduced by rotational rheometry, can also influence the onset time and morphology of PA 66 crystallization.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Materials Science, Textiles
Jackie Y. Cai, Jie Min, Jill McDonnell, Lijing Wang, Robert Knott
Summary: Gamma irradiation was applied to vertically aligned carbon nanotube (CNT) forests to improve the interfacial adhesion and then spun into CNT yarns. The yarns spun from the irradiated forests showed higher tensile strength and lower breaking elongation. Increasing spinning tension improved the strength of both the irradiated and unirradiated yarns, but the irradiated yarns had more significant improvements. The relative improvements in yarn tenacity ranged from 14% to 26% under various spinning tensions.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Chemistry, Physical
Kunjie Wu, Bin Wang, Yutao Niu, Wenjing Wang, Cao Wu, Tao Zhou, Li Chen, Xianghe Zhan, Ziyao Wan, Shan Wang, Zhengpeng Yang, Yichi Zhang, Liwen Zhang, Yongyi Zhang, Zhenzhong Yong, Muqiang Jian, Qingwen Li
Summary: By using chlorosulfonic acid-assisted wet stretching and mechanical rolling, high alignment and dense packing of carbon nanotube fibers (CNTFs) were achieved, resulting in significant enhancement of mechanical and electrical properties.
Article
Materials Science, Multidisciplinary
Somayeh Abazari, Ali Shamsipur, Hamid Reza Bakhsheshi-Rad, Filippo Berto
Summary: Magnesium-based composites, such as the Mg-3Zn/xfCNTs composite studied in this paper, have been investigated as biodegradable materials for orthopedic implants. The incorporation of zinc and functionalized carbon nanotubes (fCNTs) in the magnesium matrix has been successfully achieved using a ball milling process. The composite exhibits excellent mechanical properties, corrosion resistance, and biocompatibility, making it a potential candidate for biodegradable implant applications.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Composites
Chengming Yue, Huigai Li, Weihao Xu, Yan Zhang, Ping Wang, Weibang Lyu, Yuanyuan Li
Summary: Carbon nanotube strips (CNTSs) were used as preforms for developing high performance nanocomposites. CNT/epoxy resin (EP) composite strips with different orientations and densities were prepared by infiltrating EP into CNTS, stretching, and pressing. Tensile strength of composite strips prepared under stretching and pressing was nine times higher than that of pristine CNTSs due to rearrangement of CNTs and proper resin infiltration.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Feng Tang, Seok-Ju Kim, Tae-Gyeong Eom, Minyoung Seo, Young-Gi Song, Jin-Hyeok Park, Young Gyu Jeong
Summary: The impacts of polyketone-grafted multiwalled carbon nanotube (CNT-g-PK) on the thermal, mechanical, electrical, and electromagnetic interference (EMI) shielding performance of polyketone (PK) composites are reported. PK/CNT-g-PK composites with varying CNT amounts were fabricated through reactive melt-compounding and exhibited enhanced properties.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Physical
K. Ma, Z. Y. Liu, K. Liu, X. Grant Chen, B. L. Xiao, Z. Y. Ma
Summary: Heterogeneous carbon nanotube (CNT)/Al-Cu-Mg composites with ductile zones (DZs) and brittle zones (BZs) were fabricated, where the grain size and width of DZs were controlled by high energy ball milling (HEBM) for improved strength-ductility. Under optimized conditions, the heterogeneous composite showed a significant increase in elongation and tensile strength compared to the uniform composite, with appropriate grain refinement in the DZs alleviating low yield phenomenon and reducing stress concentration in the BZs.
Article
Materials Science, Multidisciplinary
Xiaohua Zhang, Xin Wang, Xin Zhang, Jingyun Zou, Yongyi Zhang, Jingna Zhao, Qingwen Li
Summary: This study reports a strategy to efficiently manipulate carbon nanotube (CNT) networks by forming double networks with branched polyethylenimine (PEI). The double network had high viscoelasticity and ductility, enabling efficient film stretching or creeping for CNT alignment, significantly improving the mechanical strength of CNT films. The viscous drag from the polymer network enhanced the movability of CNTs in reconstructing new networks, resulting in the film's repairability. This double-networking strategy provides a new way to manipulate CNT assemblies for high-performance applications.
NPG ASIA MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
A. Abdeldaym, Rania F. Khedr, Rabab S. Jassas
Summary: Polymer materials made of Polypyrrole (PPy) with different percentages of clay nanoparticles have shown significant impact on structure and mechanical behavior. These materials have demonstrated efficient removal of heavy metal water contaminants and potential for broader industrial applications.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Engineering, Manufacturing
Shengyou Pan, Hongyao Shen, Linchu Zhang
Summary: This study prepared carbon nanotube reinforced PPS 3D printing filaments and analyzed the effects of CNT content on their performance. Compared to pure PPS, the composites exhibit improved mechanical and thermal properties.
ADDITIVE MANUFACTURING
(2021)
Article
Construction & Building Technology
Dong-Hee Son, Dongsun Hwangbo, Heongwon Suh, Baek-Il Bae, Sungchul Bae, Chang-Sik Choi
Summary: The purpose of this study was to develop concrete with improved mechanical performance by using a combination of various nanomaterials (f-CNTs, NS, GO). The researchers proposed a method for mixing concentrated aqueous solution by applying a dispersion method based on the functional group ratio of the nanomaterials. The mechanical performance of the concrete was evaluated through uniaxial compression and splitting tensile tests, and it was found that the incorporation of nanomaterials increased splitting tensile strength and elastic modulus.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Materials Science, Composites
Xinrong Jiang, Shuxuan Qu, Zhengzhong Shao, Wenbin Gong, Gengheng Zhou, Weibang Lu
Summary: The study revealed that the dispersion time significantly affects the microstructure and mechanical properties of CNT solutions and spun fibers. Increasing dispersion time leads to smaller CNT bundle size and length, resulting in improved homogeneity of CNT dispersions. The mechanical properties of CNT fibers initially increase and then decrease with dispersion time.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
P. Y. Li, X. N. Li, Z. Y. Liu, L. Q. Chen, B. L. Xiao, Z. Y. Ma
Summary: The study found that laminate carbon nanotube (CNT)/Al-Cu-Mg composites showed significantly improved strength-ductility due to the mechanical incompatibility between ductile and brittle layers, which produced a large number of geometrically necessary dislocations (GNDs) inhibiting strain localization. Use of ultrafine grain Al as ductile layers further increased strength by 14% compared to coarse grain Al, showcasing better coordination with the brittle layers.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Kourosh Sayar Dogahe, Somaye Akbari, Mohammad Haghighat Kish
Summary: Eco-friendly PVA films and their composites with additives were fabricated and characterized, revealing chemical and physical interactions. The presence of APTES-HNTs significantly influenced the viscoelastic behavior of the films and improved the mechanical properties of PVA, making it suitable for further applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Florence Saffar, Camille Sonnenfeld, Pierre Beauchene, Chung Hae Park
FRONTIERS IN MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
N. Naouar, D. Vasiukov, C. H. Park, S. V. Lomov, P. Boisse
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Engineering, Manufacturing
M. Bodaghi, D. Ban, M. Mobin, C. H. Park, S. Lomov, M. Nikzad
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Materials Science, Composites
Anurag Pisupati, Leila Bonnaud, Mylene Deleglise-Lagardere, Chung Hae Park
Summary: A new type of flax fiber-reinforced bio-sourced thermoset composites was investigated and compared with flax fiber reinforced epoxy composites in hot and humid aging conditions. The results showed that the bio-sourced flax/benzoxazine composites exhibited better mechanical properties and higher recovery after aging compared to flax/epoxy composites, indicating their potential for development in the future.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Mathematics, Interdisciplinary Applications
Xiao Ma, Modesar Shakoor, Dmytro Vasiukov, Stepan V. Lomov, Chung Hae Park
Summary: Numerical artifacts in FFT methods for multiphase elastic problems, caused by irregular discretization of the interface, are addressed in this study. An enhanced composite voxel method using the level-set technique is proposed to alleviate implementation difficulties and is particularly useful for non-parametrized interface representations.
COMPUTATIONAL MECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Modesar Shakoor, Chung Hae Park
Summary: A novel finite element framework is proposed for numerical simulation of two phase flows with surface tension, utilizing Level-Set method and P2 interpolation to enhance convergence rates, along with balanced-force surface force model to solve static problems and stabilized using variational multiscale framework. An anisotropic mesh adaption method is proposed for accuracy and optimal convergence rates, maintaining complexity fixed during simulation.
COMPUTERS & FLUIDS
(2021)
Article
Agricultural Engineering
Anurag Pisupati, Lies Willaert, Frederik Goethals, Willem Uyttendaele, Chung Hae Park
Summary: The study compared the yield and tensile strength of ten flax fiber varieties, finding significant influences from growth year, pulling date, and retting degree on fiber performance. Some flax varieties demonstrated good tensile strength stability.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Materials Science, Composites
Christophe Cruanes, Keerthi Krishna Parvathaneni, Dmytro Vasiukov, Chung Hae Park
Summary: This study investigated the mechanism of crack propagation in three-dimensional glass-fiber warp interlock epoxy composites under fatigue loading using time-lapse micro-computed tomography observations. The results showed that detectable cracks were initiated by debonding between adjacent warp yarns and grew along their interface. Further crack propagation occurred along one of the warp yarns aligned in the loading direction. The coalescence of cracks and propagation to weaker zones were observed around the middle lifetime. The influence of void defects at different material scales was also demonstrated, with interyarn voids having little impact on fatigue performance and intrayarn voids significantly degrading the fatigue performance at the micro-scale.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Computer Science, Interdisciplinary Applications
Modesar Shakoor, Chung Hae Park
Summary: In this article, a multiscale approach is proposed for the computational homogenization of unsteady incompressible flows in domains containing small obstacles. The method, implemented using finite element analysis, shows robustness and efficiency in terms of computational cost and accuracy.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
(2023)
Article
Mechanics
Xiao Ma, Yang Chen, Modesar Shakoor, Dmytro Vasiukov, Stepan V. Lomov, Chung Hae Park
Summary: This paper focuses on the numerical implementation of phase-field models of fracture using the Fast Fourier Transform based numerical method. The influence of a simplification in the phase-field evolution equation on heterogeneous materials is assessed and a complete formulation is proposed. The assessment shows that the simplified formulation leads to artificial diffusion of damage between different components, while the complete formulation suppresses this diffusion.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Materials Science, Composites
Anurag Pisupati, Mathilde Leroy, Thomas Laurent, Chung Hae Park
Summary: This study focuses on the development and investigation of self-reinforced polylactic acid (SRPLA) composites made from different nonwoven preforms with different bicomponent filament architectures. The results show that the flexural modulus and strength of these composites are significantly higher than that of pure PLA matrix. The bicomponent filament architecture has negligible influence on the mechanical performance, while the nonwoven architecture has a significant impact on both residual void volume fraction and mechanical properties of the composites. The SRPLA composites demonstrate their applicability for semi-structural parts.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Engineering, Manufacturing
Rowshni Jabeen, Benoit Cosson, Andre Chateau Akue Asseko, Sofie Verstraete, Frederik Desplentere, Chung Hae Park
Summary: This study numerically investigates the influence of fibre orientation on laser transmission welding of short fibre-reinforced thermoplastic composites. A three dimensional numerical structure is generated based on real microstructure obtained from injection moulding simulations. Ray tracing algorithm is implemented to simulate laser beam reflection and refraction in the composite material. The effect of fibre orientation on light scattering phenomenon is compared for different cases.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Chemistry, Physical
Romain Agogue, Modesar Shakoor, Pierre Beauchene, Chung Hae Park
Summary: This study presents a numerical analysis of the effects of race tracking on the formation of dry spots and the accuracy of permeability measurement during the resin-transfer-molding process. Randomly generated defects are assessed using a Monte Carlo simulation method in the numerical simulation of the mold-filling process. The influence of race tracking on unsaturated permeability measurement and dry spot formation is investigated on flat plates. The results show that race-tracking defects near the injection gate can increase the measured unsaturated permeability by up to 40%.
Article
Engineering, Aerospace
Dae-Sung Son, Jong-Min Hyun, Salim Chaki, Chung Hae Park, Jung-Ryul Lee
Summary: An active frequency selective surface (AFSS) pattern applicable to stealth radomes was designed and manufactured in this study, with its effectiveness verified through measurements of electromagnetic performance and numerical evaluation of mechanical performance in an actual flight environment. The proposed AFSS pattern for stealth radomes was evaluated to verify the feasibility of incorporating AFSSs into stealth radomes.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2021)
Article
Materials Science, Composites
Masoud Bodaghi, Imen Gnaba, Xavier Legrand, Damien Soulat, Peng Wang, Mylene Deleglise-Lagardere, Chung Hae Park
Summary: This paper investigates the influence of different tufting patterns on the in-plane permeability of tufted preforms, revealing that the permeability values of tufted preforms are lower than those without tufting.
ADVANCED COMPOSITE MATERIALS
(2021)
