Article
Materials Science, Multidisciplinary
Haihua Wu, Shaokang Liu, Bin Chao, Wenxin Fu, Kaixin Deng, Yan Li
Summary: The Ni/PLA/TPU composites were prepared by melt extrusion process. The mechanical and microwave absorbing properties were investigated. The composites showed high strength and wide-frequency characteristics, making them suitable for high-efficiency microwave absorbing devices.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Mechanics
Hyunseok Kwon, Min-Su Jang, Jong-Min Yun, Yurim Park, Changkyo Shin, Jinkyu Yang, Chun-Gon Kim
Summary: Silicon carbide (SiC) fibers can serve as load-bearing components, piezoresistive materials, and microwave absorbers in fiber-reinforced polymer composites. By embedding SiC fiber networks in composites, simultaneous self-sensing and microwave-absorbing capabilities can be achieved.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Sang Min Baek, Won Jun Lee, Sang Yong Kim, Seong Su Kim
Summary: This study conducted a characterization of a honeycomb-shaped absorber and determined the range of relative permittivity to increase the absorption bandwidth. The research also verified the utility of a film-based honeycomb absorber that can maintain broadband absorptivity continuously.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Yan Wang, Haiyan Zhang, Qibai Wu, Shengkai Li, Heng Gao, Baoshan Wan, Daofeng Wen, Guoxun Zeng
Summary: In this study, MXene composites decorated with Fe3O4 nanoparticles were prepared to improve the electromagnetic attenuation performance in the microwave and millimeter-wave frequency bands. The MXene layers were distributed with Fe3O4 nanoparticles, forming a sandwich-like microstructure. By adjusting the thickness of the absorber, the minimum reflection loss (RLmin) can be up to -66.25 dB, and the maximum effective absorption bandwidth (EAB) can be up to 8.49 GHz. The MXene/Fe3O4 composites show superior EMW absorption performance in microwave and millimeter-wave frequency bands due to the synergistic effects and structural advantages of Fe3O4 and MXene.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Alexei Kaledin, Sergey Shikunov, Kirill Komarov, Boris Straumal, Vladimir Kurlov
Summary: A novel method for producing SiC-based composites reinforced with Mo wire has been developed in this study. By infiltrating porous carbon blanks with molten silicon, a complex interfacial silicide layer with a predominant MoSi2 phase is formed on the surface of the Mo wire. Mechanical tests show quasi-plastic damage and the reinforcing elements act as stoppers for propagating cracks. This method reduces the cost of machining and manufacturing products with complex shapes and enables broader applications of SiC-based composites.
Article
Mechanics
Sang Min Baek, Won Jun Lee
Summary: Functional composites with nanofillers are used to enhance radar absorbing structures (RAS), with the relative permittivity of RAS substrate measured under various environmental conditions. Maximum likelihood estimation is used to determine probability distributions of dielectric materials for RAS, and RBDO is applied for reliability-based design optimization. RBDO results in a significant reduction in failure probability despite a slight increase in total thickness.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Ceramics
Peng Wu, Wenting He, Hongbo Guo
Summary: A novel microwave absorbing material, sodium cobaltates (Na0.78CoO2), with a lamellar structure, was synthesized and showed good electromagnetic attenuate property. The composite with 50 wt% Na0.78CoO2 and 50 wt% paraffin achieved a minimum reflection loss (RL) of around -51.7 dB at a frequency of 8.2 GHz when the thickness was about 2.41 mm. Its effective absorbing bandwidths (RL <-10 dB) were in the range of 12.5 to 15.6 GHz for a sample thickness of around 1.5 mm. The electromagnetic attenuation mechanisms of the composite were related to conductive loss, multiple reflection loss, and dipole or interfacial polarization loss.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Hongying He, Youlin Zhao, Bin Lu, Yunze He, Guoji Shen, Zhiyi He, Hongjin Wang
Summary: This paper presents a resonant cavity microwave thermography detection system based on the principle of microwave heating, which is used for detecting debonding defects in composite materials. By thermally loading the test piece and analyzing temperature differences, the system can achieve high-precision debonding detection.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Gwendolyn Jia Hao Lim, Zeshi Yang, Yi Hou, Pon Janani Sugumaran, Zhi Qiao, Jun Ding, Wentao Yan, Yong Yang
Summary: This study demonstrates the well-controlled alignment of silicon carbide nanowires (SiCNW) in a silicone matrix using direct ink writing (DIW)-based 3D printing. The optimized alignment leads to a significant improvement in both reflection loss (RL) and effective attenuation bandwidth (EAB). DIW can play an important role in materials design for high-efficiency microwave attenuation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Praveen Negi, Ashavani Kumar
Summary: In this study, an activated carbon/epoxy composite was synthesized using waste mango leaves biomass as the carbon source. The material exhibited excellent microwave absorption performance due to its porous and bowl-type structure, providing large surface area, high impedance matching, and attenuation of microwaves by various processes. This composite material is lightweight, economical, and structurally stable for microwave absorption applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Aichun Long, Pengfei Zhao, Lusheng Liao, Rui Wang, Jinlong Tao, Jianhe Liao, Xiaoxue Liao, Yanfang Zhao
Summary: Hierarchical structures derived from biomass, such as carbonized kapok fiber, show excellent microwave-absorbing performance with broad absorption bandwidth. These lightweight and sustainable materials have great potential in the field of microwave absorption.
Article
Acoustics
Seyed Ehsan Samaei, Umberto Berardi, Ebrahim Taban, Parham Soltani, Seyyed Mohammad Mousavi
Summary: An innovative natural fibro-granular composite made of kenaf fibers and waste rice husk granules was developed and optimized for its sound absorption properties. The optimized composite demonstrated superior acoustic behavior compared to samples made of 100% kenaf or 100% rice husk. Empirical and phenomenological models were used to predict the frequency-dependent sound absorption coefficient of the optimized material, with the Johnson-Champoux-Allard model showing the best prediction performance.
Article
Materials Science, Composites
Roman Shishkin, Yuliy Yuferov
Summary: The microstructure of SiC matrix composite materials produced by pressureless aluminum melt infiltration at 950 degrees Celsius was investigated. It was found that there are different areas formed during the direct infiltration of aluminum into sintered SiC preform, leading to improved density and hardness of the infiltrated composite material, making it a prospective wear resistant lining.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Tianxiang Sun, Lei Zhang, Wei Wang, Wen Li, Shougang Chen, Kai Jin, Chengcheng Ma
Summary: This paper presents the design and fabrication of a self-healing composite material with rapid hydrogen-bonding interaction by combining low molecular weight poly(acrylic acid) and high molecular weight polyvinylpyrrolidone through polymerization. Multiwalled carbon nanotubes were added as additives. Experimental results showed that the composite materials exhibited excellent self-healing properties and electromagnetic performance with the addition of carbon nanotubes. Molecular dynamics simulations indicated that the carbon nanotubes could accelerate the self-healing speed of the composite materials.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Byeong-Hun Woo, Dong-Ho Yoo, Seong-Soo Kim, Jeong-Bae Lee, Jae-Suk Ryou, Hong-Gi Kim
Summary: In this study, silicon carbide, steel fiber, and graphite were used to enhance the thermal conductivity of concrete. Steel fiber compensated for the negative effects of graphite and improved thermal durability, while silicon carbide helped to enhance thermal durability in the same way as steel fiber. The study concluded that using 50% silicon carbide was the most effective approach, and caution should be taken when considering the content of graphite or other conductive materials in further studies.
Article
Engineering, Electrical & Electronic
Won-Ho Choi, Byeong-Su Kwak, Young-Woo Nam
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2020)
Article
Materials Science, Composites
Choe Hyeon-Seok, Kwak Byeong-Su, Park Seong-Min, Truong Viet-Hoai, Nam Young-Woo, Kweon Jin-Hwe
ADVANCED COMPOSITE MATERIALS
(2020)
Article
Mechanics
Won-Ho Choi, Byeong-Su Kwak, Jin-Hwe Kweon, Young-Woo Nam
COMPOSITE STRUCTURES
(2020)
Article
Mechanics
Min-Su Jang, Jae-Hun Choi, Woo-Hyeok Jang, Young-Woo Nam, Chun-Gon Kim
COMPOSITE STRUCTURES
(2020)
Article
Mechanics
Won-Ho Choi, Byeong-Su Kwak, Jin-Hwe Kweon, Young-Woo Nam
COMPOSITE STRUCTURES
(2020)
Article
Engineering, Manufacturing
Seong-Min Park, Rene Roy, Jin-Hwe Kweon, Youngwoo Nam
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Engineering, Manufacturing
Won-Ho Choi, Hyeon-Seok Choe, Young-Woo Nam
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2020)
Article
Engineering, Multidisciplinary
Byeong-Su Kwak, Won-Ho Choi, Yeong-Hoon Noh, Gi-Won Jeong, Jong-Gwan Yook, Jin-Hwe Kweon, Young-Woo Nam
COMPOSITES PART B-ENGINEERING
(2020)
Review
Materials Science, Composites
Van-Tho Hoang, Bo-Seong Kwon, Jung-Won Sung, Hyeon-Seok Choe, Se-Woon Oh, Sang-Min Lee, Jin-Hwe Kweon, Young-Woo Nam
Summary: Promising CF/PEKK composites were fabricated using Automated Fiber Placement. Mechanical properties, void content, and crystallinity were evaluated for four different postprocessing methods, with hot press yielding the best quality.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Mechanics
Min-Su Jang, Jae-Hun Choi, Woo-Hyeok Jang, Young-Woo Nam, Chun-Gon Kim
Summary: Recent studies have investigated the implementation of radar-absorbing structures by electrolessly plating metal on fibers in the form of dots. The mechanical properties of dot-type electroless plated composite materials were found to be insufficiently researched. The study showed that while the plating process decreased the tensile strength of single fibers, it improved the interfacial shear strength between the fibers and epoxy, leading to increased compressive and interlaminar shear strengths. This suggests that composites with dot-type electroless plating could be suitable for use in actual structures such as stealth aircraft.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Composites
Gi-Won Jeong, Yeong-Hoon Noh, Won-Ho Choi, Joon-Hyung Shin, Jin-Hwe Kweon, Jong-Gwan Yook, Young-Woo Nam
Summary: This study presents an electromagnetic-mechanical repair patch (EMRP) method to restore the mechanical and electromagnetic wave absorption performance of a radar-absorbing structure damaged by lightning strike. The method considers the need to maintain structural integrity and electrical continuity for high repair efficiency. Experimental results validate the feasibility of using the proposed EMRP method in repairing radar-absorbing structures.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Mechanics
Byeong-Su Kwak, Gi-Won Jeong, Won-Ho Choi, Young-Woo Nam
Summary: In this study, a broadband microwave-absorbing honeycomb core structure was designed and fabricated using a nickel-coated glass fabric, which showed good absorption properties within a specific frequency range and underwent mechanical testing. Due to its desirable radar-absorption and mechanical characteristics, the structure has significant potential for use in stealth technology applications.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Won-Ho Choi, Hyeon-Seok Choe, Young-Woo Nam
Summary: This study developed a multifunctional SHIMAC with microwave absorption and hypervelocity impact-shielding capabilities. Experimental results demonstrated that the SHIMAC has excellent microwave absorption performance and hypervelocity impact-shielding performance.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Composites
Boseong Kwon, Hyeonseok Choe, Jaehyeng Jeong, Hyunwoo Ju, Jin-Hwe Kweon, Young-Woo Nam
Summary: This paper investigates the mechanical properties of carbon fiber reinforced polyetherketoneketone (CF/PEKK) thermoplastic induction-welded composite joints, using finite element modeling and simulation to analyze temperature behavior and experimental results. Single-lap shear strength tests were conducted to check weld quality, revealing that optimal process parameters could potentially improve mechanical performance.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Boseong Kwon, Wonwoo Choi, Hyunwoo Ju, Jin-Hwe Kweon, Young-Woo Nam
Summary: This study investigated the consolidation process of radial-type braided carbon fiber reinforced polyetherketoneketone (CF/PEKK) thermoplastic composite tubes. Different consolidation processes were evaluated, and the OML-PTFE consolidation process showed a flat surface without wrinkles and low void content, making it suitable for manufacturing thermoplastic composite tubes for actual aircraft use. Other processes resulted in high void content, making them less appropriate.
FUNCTIONAL COMPOSITES AND STRUCTURES
(2021)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
