Article
Engineering, Multidisciplinary
Meiqi Hu, Baozhong Sun, Bohong Gu
Summary: A microstructure model based on fully thermo-mechanical coupling behavior of 3-D braided composites has been proposed for characterizing multiple transverse impact damage. The model incorporates interfacial contact and cohesive debonding, as well as ductile and shear damage, along with thermo-mechanical coupling constitutive equations. Adiabatic temperature rise and interfacial damage are concentrated on the impact surface with local plastic deformation, caused by the heat energy generated in impact interaction leading to thermal expansion of epoxy resin and extra internal stress. Comparisons between braided preforms with and without axial yarns show that axial yarns improve heat energy absorption and impact damage tolerances, while impeding impact damage growth.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Qihang Wang, Xinyu Gao, Meiqi Hu, Bohong Gu, Baozhong Sun
Summary: 3-D braided composite three-way circular tubes are seamless connected tubes used for high strength connecting joints. A novel braiding method of 'yarn-added, yarn realigned' was developed to prepare three-way tubular preforms. Low-velocity impact compressions (LVIC) were conducted to study the impact damage effect of branch length and braiding layers. The test results showed that the ultimate strength was positively correlated with the impact energy and braiding layers, while negatively correlated with the branch tube length. The influence of braiding layers on the LVIC behaviors is more significant than that of the branch length.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zunjarrao Kamble, Bijoya Kumar Behera
Summary: This research presents a simple model to predict the stress-strain characteristics of 3D-braided sisal yarn preforms by considering the reorientation of the yarn under tensile load. 3D-braided sisal yarn preforms were developed using a 3D-braiding machine with four carriers and varying surface braiding angles. The experimental values were in very good agreement with the predicted results.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Di Zhang, Xitao Zheng, Jin Zhou, Xinyi Song, Pu Jia, Haibao Liu, Xiaochuan Liu
Summary: The mechanical properties of three-dimensional braided composites (3DBC) decrease with increasing braiding angle. Different types of 3DBC exhibit different mechanical properties at different angles. Additionally, the tensile strength is generally twice as much as the compressive strength, and the compressive modulus is consistently 10% higher than the tensile modulus. The failure modes of 3DBC are also affected by the braiding angle.
Article
Materials Science, Textiles
Jing Li, Yajun Yin, Qing Huang, Gui Yang, Feng Jiang
Summary: This research proposes a novel braiding machine model that is extendable, capable of changing patterns quickly, and incorporates multiple functionalities. This advanced machine contributes to the evolution of the braiding industry by breaking the limitations of traditional equipment and significantly reducing equipment costs for braiding factories. The research highlights the superior mechanical structure, operational mode, and functional characteristics of the robotic arm braiding machine.
JOURNAL OF THE TEXTILE INSTITUTE
(2023)
Article
Engineering, Manufacturing
Yuanyuan Wu, Limeng Xun, Shuwei Huang, Chunlei Ren, Baozhong Sun, Bohong Gu
Summary: The study shows that the braided architecture has a positive impact on the thermal oxygen ageing behaviors of carbon fiber/epoxy composites, slowing down the initiation and propagation of cracks and helping to maintain the stiffness and damping properties of the materials after ageing.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Review
Engineering, Manufacturing
Chenyang Song, Wei Fan, Tao Liu, Shujuan Wang, Wen Song, Xingzhong Gao
Summary: Three-dimensional (3D) stitching technology is an effective method to improve the interlaminar performance of composites, but there is still insufficient information on stitch methods, equipment, and failure mechanisms. This review systematically introduces stitched composites from the aspects of stitching methods, machines, parameters, and mechanical performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Polymer Science
Yuxing Zhou, Kenneth S. Schweizer
Summary: We present a microscopic theory for stress relaxation in dense polymer nanocomposites, which is based on the rearrangement of cohesive segment-nanoparticle (NP) bridging complexes. The key dynamical event involves the activated motion of small NPs, allowing the confined segments to relax. The activation energy depends on the NP bridge coordination and potential of mean force barrier, and it shows a nonlinear variation with interfacial cohesion strength and NP concentration. The theory is in excellent agreement with experimental results, and it has implications for other hybrid macromolecular materials.
Article
Engineering, Manufacturing
Yuhao Tan, Yanxue Ma, Jingyan Liu, Zongjun Liu, Fengfan Wu, Yuling Li
Summary: This study demonstrates the application of flock-reinforced shear thickening gel in protective equipment. Three-dimensional woven fabrics with folded structures were efficiently manufactured using a modified loom, and 3D FRSTG/woven fabric composites were produced through a simple inclusion procedure. These composites exhibit flexibility and breathability, and show responsive impact resistance. Wearable protective applications prove the integration of breathability and impact resistance in these composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Multidisciplinary Sciences
Ying-ming Yang, Xue-bin Gu, Xin-jie Liu, Bai Lu, Xiao-jun Ding, Yong-qiang Zhao, Wei-long Zhang, Gang Liu
Summary: Conventional triaxial loading tests were conducted to study the mechanical behavior and reloading reinforcement characteristics of fractured coal with different fissure angles. The results showed that the stress-strain curve exhibited multi-peak phenomena when the fissure angle was small. As the fissure angle increased, the stress drop phenomenon in the peak region weakened. The peak stress of the specimens increased and then decreased with the increase of the fissure angle, while the elastic modulus showed an overall increasing trend, indicating the controlling effect of the crack angle. Additionally, cyclic loading had a certain enhancement effect on the strength of fractured coal when the specimens were unloaded near the crack closure stress.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Manufacturing
Jinlei Li, Nahiene Hamila, Gildas L'Hostis, Peng Wang
Summary: Tubular braids with a hollow structure are widely used in textile composite manufacturing. This study investigates the mechanical responses of these fabrics under axial tensile load, revealing their complex behavior involving non-homogenous in-plane shearing, pure yarn extension, and a combination of the two. A locking structure was proposed as a sign of structural damage, and an analytical model was developed to describe the relationships of shear angle/shear moment and shear angle/shear load based on unit cells. The study's findings improve understanding of braided fabric forming and enhance numerical simulation of the process.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Shangqiao Wu, Yichun Liu, Jie Yu, Qi Zhao, Jingmei Tao, Zhong Wu, Jinfeng Zhang, Yunying Fan, Yanzhang Liu, Caiju Li, Jianhong Yi
Summary: In this paper, an inhomogeneous copper matrix composite with carbon nanotube reinforced copper foam (CNTs/Cuf) as the three-dimensional (3-D) skeleton is designed to overcome the paradox between strength and ductility or conductivity. By spark plasma sintering (SPS), the open cell composite foams with uniformly embedded CNTs are filled with dense copper phase in the foam pores to form the inhomogeneous composites. The inhomogeneous composite reinforced with CNTs/Cuf shows a combination of high electrical conductivity (93.4% IACS), tensile strength (366.7 MPa), and fracture elongation (31.78%) with a quite low CNTs content (0.2414 vol%).
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Mechanics
Frieder Heieck, Christoph Kuon, Andrea Miene, Peter Middendorf, Axel S. Herrmann
Summary: This paper analyzes the tensile properties of 2D braid reinforced composites in relation to process-induced fiber architecture variations. Parametric study and image analysis are conducted to determine the effects of radial braiding parameters on the braid characteristics and mechanical properties. The results show strong correlations between measured fiber architectures and mechanical properties, suggesting the importance of detailed information about the fiber architecture for predicting the properties of 2D braided composites.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Textiles
Qianqian Li, Honghua Zhang, Yasmine Mosleh, Rene Alderliesten, Wei Li
Summary: This paper presents the design and development of three-dimensional braided honeycomb structures, establishing the relationship between braiding parameters and honeycomb geometric parameters. Several three-dimensional braided honeycomb fabrics are introduced. By controlling the movement of yarn carriers, the interlaced state of yarns can be changed, resulting in the formation of three-dimensional braided honeycomb fabrics. The effects of braiding cycles, number of yarn columns, and braiding angle on the relative density are also investigated.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Y. Luo, S. P. Hu, Y. Z. Liu, Y. X. Wang, X. G. Song, J. Cao
Summary: This study introduces an enhanced honeycomb sandwich structure that improves the mechanical properties through topological reinforcement and material strengthening. The structure is designed and fabricated using a vacuum-brazing method and the filling of gaps with brazing filler metal. The results show a significant increase in compressive strength and elastic modulus, highlighting the importance of this structure in the fabrication of lightweight engineering bioinspired materials and devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Binbin Liao, Jianwu Zhou, Jinyang Zheng, Ran Tao, Li Xi, Tian Zhao, Ying Li, Daining Fang
Summary: This study investigated the impact of Z-pins on the low velocity impact performance of composite laminates. It was found that although Z-pins could not delay delamination initiation, they were able to enhance resistance to penetration, with 0 degrees Z-pinning showing better effectiveness in suppressing delamination damage and internal defects.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Review
Materials Science, Multidisciplinary
Xujin Yuan, Mingji Chen, Yin Yao, Xiaogang Guo, Yixing Huang, Zhilong Peng, Baosheng Xu, Bowen Lv, Ran Tao, Shenyu Duan, Haitao Liao, Kai Yao, Ying Li, Hongshuai Lei, Xu Chen, Guangfu Hong, Daining Fang
Summary: Metamaterials, utilizing unconventional properties achieved through microarchitectural designs, have become a research hotspot in electromagnetic, acoustic, mechanical, and physics fields. However, the challenge lies in integrating mechanical features and specific functions. The trend is towards incorporating multifunctional designs into single integrated structures, requiring mechanical-driven designs and structural level innovations for future advancements.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Hao Zhou, Xinye Cao, Chuanlei Li, Xiaoyu Zhang, Hualin Fan, Hongshuai Lei, Daining Fang
Summary: This study proposes an innovative design strategy for self-supporting lattice units that considers the geometric constraints of additive manufacturing, deriving the elastic constitutive relation using the nodal displacement method. This design strategy has been employed in the design of novel ultra-light spacecraft structures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Instruments & Instrumentation
Rongqi Zhu, Zhaoliang Qu, Shuo Yang, Daining Fang
Summary: An elevated-temperature in situ microtomography apparatus has been developed for measuring internal damage parameters under tensile loads at high temperatures up to 1000 degrees C. The apparatus utilizes a high-resolution system with a microfocus x-ray source and customized grips for conducting tensile tests. Tests on carbon-fiber-reinforced silicon-carbide matrix specimens at 800 degrees C and 1000 degrees C have been conducted to study crack propagation behavior under thermomechanical coupling loads.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Materials Science, Composites
Yixing Huang, Dong Wu, Kai Zhang, Haiyang Yang, Wen Dong, Mingji Chen, Daining Fang
Summary: This study successfully demonstrates the design of a laminate metastructure with broadband and wide incident-angle microwave absorption through the use of topological optimization and genetic algorithms. The structure shows excellent absorption performance and mechanical strength in experiments.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Composites
Zhong Zhang, Hongshuai Lei, Haiyang Yang, Mingji Chen, Changxian Wang, Heng Yang, Daining Fang
Summary: The study introduces a novel impedance-type square lattice composite structure with superior load-bearing and radar absorption capabilities for aerospace and marine applications. The development of theoretical prediction models and experimental verification reveal the inherent effect mechanism between unit cell geometries and electromagnetic properties. Further simulations demonstrate wide applicability and equivalence deduction between structural parameters.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Z. L. Qu, S. Y. Luo, H. R. Bai, R. J. He, X. M. Cheng, Y. M. Pei, D. N. Fang
Summary: This study investigated the in-plane shear strength of 2D C/SiC composites at different temperatures using a modified Iosipescu method. Results showed that the release of tensile stress at elevated temperatures and the oxidation of carbon fibers were the main factors affecting the IPSS variations. The modified Iosipescu method can be a valuable tool for evaluating in-plane properties of CMCs.
EXPERIMENTAL MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
P. Wang, K. F. Wang, B. L. Wang, L. Xi, K. Sano, T. Shimada, H. Hirakata, D. N. Fang
Summary: This study aims to stably and accurately measure the interlaminar fracture toughness (IFT) of multilayered Bi2Te3 for evaluating the reliability of its thermoelectric devices. By developing a tapered cantilever bending (TCB) experiment, the measurement of IFT for Bi2Te3 was successfully achieved, providing a new method for assessing multilayered materials.
EXPERIMENTAL MECHANICS
(2022)
Article
Engineering, Electrical & Electronic
Xujin Yuan, Zhenhong He, Xiuzhu Ye, Mingji Chen, Ying Li, Weiduan Li, Rui Zhang, Yixing Huang, Cunxi Liu, Xiaodong Cheng, Daining Fang
Summary: The paper introduces a wideband metamaterial ground cloak and validates its operational functions through experiments. A comparison between wideband and narrowband metamaterials shows the scattering improvement effect. Experimental results demonstrate the effectiveness of the proposed metamaterial within the gigahertz frequency range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Materials Science, Composites
Qiubo Li, Yihui Chen, Yanfei Chen, Shigang Ai, Daining Fang
Summary: This study aims to investigate the effect of void defects on the failure behavior and strength of C/SiC composites. Micro-computed tomography and finite element models were used to study the influence of void volume fractions and geometry on the materials. This research is important for better understanding the impact of defects on the mechanical behavior of composite materials.
APPLIED COMPOSITE MATERIALS
(2022)
Article
Mechanics
Dong Wu, Zeang Zhao, Hongshuai Lei, Hao-Sen Chen, Qiang Zhang, Panding Wang, Daining Fang
Summary: Natural tissues can self-strengthen through biological growth, while synthetic materials are typically static. The concept of bio-inspired materials aims to develop materials with dynamically programmable performances. A solvent-free elastomer composite system is proposed in this study, which can be strengthened through tunable self-growth cycles and is compatible with Digital Light Processing (DLP) 3D printing for fast manufacturing of high-precision structures.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Chunwang He, Jingran Ge, Xiaofei Cao, Yanfei Chen, Haosen Chen, Daining Fang
Summary: Manufacturing uncertainties in composites, such as carbon fiber deviations and voids, can impact mechanical properties. Although experiments have been conducted, quantitative characterization of fiber radius and shape deviations, and matrix void content, remain a challenge. A computational micromechanics study was conducted to understand the effects of manufacturing uncertainties on the mechanical behavior of UD composites under different loading conditions. The methodology involved establishing constitutive laws for constituents, modeling RVEs with deviations based on observations, and predicting stress-strain curves and failure modes.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Yanfei Chen, Shigang Ai, Pan Wang, Daining Fang
Summary: A physically based constitutive model for braided silicon carbide ceramic matrix composites (CMCs-SiC) at ultra-high temperature is developed, considering material orthotropy, temperature effect, tension-compression asymmetry, and crack closure effect. The model, implemented using a return mapping algorithm, shows good agreement with experimental data in predicting stress-strain relationships at different stress states and temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Review
Chemistry, Multidisciplinary
Jixiang Qi, Zihao Chen, Peng Jiang, Wenxia Hu, Yonghuan Wang, Zeang Zhao, Xiaofei Cao, Shushan Zhang, Ran Tao, Ying Li, Daining Fang
Summary: Active mechanical metamaterials combine mechanical metamaterials with smart materials for superior performance, with structures designed based on principles such as phase transition and strain mismatch. External stimuli like temperature, chemicals, and light are used for control and efficiency.
Article
Multidisciplinary Sciences
Handong Jiao, Zhaoliang Qu, Shuqiang Jiao, Yang Gao, Shijie Li, Wei-Li Song, Haosen Chen, Hongmin Zhu, Rongqi Zhu, Daining Fang
Summary: High-temperature electrochemistry is widely used but real-time observations and in-depth understanding of its evolution are limited. In this study, a high-temperature electrolysis facility with in situ x-ray computer microtomography was developed to probe the dynamic evolution of electrodes. The results provide insights into the efficiency and mechanisms of the process, as well as real-time optimization.
Article
Engineering, Multidisciplinary
Keyu Zhu, Xitao Zheng, Jing Peng, Jiaming Sun, Ruilin Huang, Leilei Yan
Summary: This paper discusses the influence of multiple impacts on the compression strength of honeycomb sandwich structures with composite face sheets. It is found that the size of the impactor affects the turning point of the compression strength. Additionally, high impact energy leads to damage in the bottom face sheet and reduces the overall compression strength.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Danqian Wang, Yanfei Yue, Jueshi Qian
Summary: Magnesium Potassium Phosphate Cement (MKPC) as a binder for steel rebars shows improved corrosion resistance when subjected to carbonation, due to the increase in pH and the formation of a more protective oxide film.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Zhibin Li, Wenyu Wang, Pengcheng Xue, Xingyu Wei, Jian Xiong
Summary: This work proposes a design approach and manufacturing method for carbon fiber reinforced plastic (CFRP) corrugated sandwich truncated cones (CSTC) to improve their anti-debonding ability and ensure reliability. The study establishes theoretical models for CSTCs' stiffness and failure modes, which are verified through experiments and finite element analysis (FEA). The research reveals the effect of geometric parameters on failure modes and performs an optimal design for CSTC structures. The findings have significant implications for the design and application of lightweight CSTCs in constructions, such as launch vehicle adapters.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mingyu Zhang, Lei Chu, Jiahua Chen, Fuxun Qi, Xiaoyan Li, Xinliang Chen, Deng-Guang Yu
Summary: This review summarizes the different structures and construction methods of fibrous membranes with asymmetric wettability. It also reviews the biological applications of these membranes and suggests future challenges.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
E. Mofakhami, L. Gervat, B. Fayolle, G. Miquelard-Garnier, C. Ovalle, L. Laiarinandrasana
Summary: This study investigates the effects of fibre concentration on the mechanical response of welded glass-fibre-reinforced polypropylene (GF-PP). Experimental observations reveal a significant reduction in weld ratio, up to 60%, indicating a decreased strength compared to the bulk material. Increasing fibre content in the welded material results in a decrease in stress at break and strain at the maximum stress. The use of DIC technique and X-ray microtomography further confirms the localized strain amplification in the welded zone due to the significant increase in fibre density.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Emad Pourahmadi, Farjad Shadmehri, Rajamohan Ganesan
Summary: This research compares the mechanical properties of laminates manufactured using automated fiber placement and conventional autoclave curing methods. The results show that laminates manufactured using automated fiber placement have a lower interlaminar shear strength compared to laminates reconsolidated using autoclave curing. A finite element simulation method is proposed to quantitatively analyze these differences.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Johnny Jakobsen, Benny Endelt, Fahimeh Shakibapour
Summary: This study proposes a new bolted/pinned joining method for composite applications, which improves load transfer by introducing a patch-type reinforcement. Experimental results demonstrate significant improvements in both static and fatigue load conditions compared to existing methods. Finite element simulations highlight the advantage of this method, as it creates a more efficient load-transferring mechanism through different stress distributions.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper proposes a novel approach to assess multi-crack behavior in layered fiber-polymer composites. The generated Compliance and R-curves provide useful insights into understanding the multiple delamination process and allow for separate evaluation of strain energy release rate (SERR) for each crack. The developed cohesive zone model successfully simulates the failure process zone of three parallel cracks, showing good agreement between the numerical model and experimental results.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Renil Thomas Kidangan, Sreedhar Unnikrishnakurup, C. Krishnamurthy, Krishnan Balasubramaniam
Summary: The induction heating process can accurately identify fiber orientation and stacking order, making it a valuable tool for large-area inspection and quality control in manufacturing fiber-reinforced composites.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Sungjun Hwang, Yousoo Han, Douglas J. Gardner
Summary: Bleached Kraft pulp, unbleached Kraft pulp, and old corrugated cardboard pulp are suitable for producing cellulose nanofibril suspensions. Spray drying is a fast, simple, cost-effective, and scalable drying method. Spray-dried cellulose nanofibrils can be used as reinforcing materials in polypropylene matrices. The particle size of cellulose nanofibrils affects the material properties.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Mehdi Mahdavi, Abbas Zolfaghari
Summary: This study aims to improve the recovery forces of shape memory polymers (SMPs) through material extrusion additive manufacturing. By using glass fiber (GF) as reinforcement and manufacturing multi-layer composite specimens, it was found that PLA with 6.62% GF exhibited the best recovery force, which was further optimized through annealing heat treatment.
COMPOSITES PART B-ENGINEERING
(2024)
Review
Engineering, Multidisciplinary
Xiang Ao, Antonio Vazquez-Lopez, Davide Mocerino, Carlos Gonzalez, De-Yi Wang
Summary: The vulnerability of natural fibers to heat and fire poses a significant challenge for their substitution of traditional fiber reinforcements in composite materials. Natural fiber/polymer composites (NFCs) are regarded as potential candidates for engineering applications due to their environmental friendliness and low-impact sourcing. Thus, appropriate approaches need to be implemented to enhance the fire safety of NFCs. This review summarizes and discusses the latest understanding of flammability and thermal properties of natural fibers, with a special focus on their interaction with polymer matrix in fire behavior. Additionally, the latest developments in flame-retardant approaches for NFCs are reviewed, covering both flame retardancy and fire structural integrity. Finally, future prospects and perspectives on fire safety of NFCs are proposed, providing insights into further advancements of NFCs.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Cheng Wang, Siqi Huo, Guofeng Ye, Bingtao Wang, Zhenghong Guo, Qi Zhang, Pingan Song, Hao Wang, Zhitian Liu
Summary: The demand for multifunctional, transparent epoxy resin with superior dielectric, mechanical, and fire-safety performances is increasing in modern industries. Researchers have developed an epoxidized, phosphaphenanthrene-containing poly(styrene butadiene styrene) (ESD) for advanced fire-safe epoxy resin, which maintains high transparency and improves UV-blocking property. The addition of 10 wt% ESD results in improved mechanical properties, decreased dielectric constant and loss, and outperformance compared to other fire-safe epoxy resins. This research provides an effective method for developing multifunctional flame-retardant epoxy resin.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Bo Pang, Heping Zheng, Zuquan Jin, Dongshuai Hou, Yunsheng Zhang, Xiaoyun Song, Yanan Sun, Zhiyong Liu, Wei She, Lin Yang, Mengyuan Li
Summary: This study develops an internal superhydrophobic material (ISM) using waste denitrification fly ash, which maintains stable hydrophobicity under harsh conditions of use and does not rely on expensive fluor-based surface modifications. The synthesized ISM has excellent matrix strength, strong waterproof properties, and retains superhydrophobicity even at damaged or friction interfaces.
COMPOSITES PART B-ENGINEERING
(2024)
Article
Engineering, Multidisciplinary
Meirbek Mussatayev, Qiuji Yi, Mark Fitzgerald, Vincent K. Maes, Paul Wilcox, Robert Hughes
Summary: Real-time monitoring of carbon fibre composites during Automated Fibre Placement (AFP) manufacturing remains a challenge for non-destructive evaluation (NDE) techniques. This study designed a directional eddy-current (EC) probe to evaluate the detectability of out-of-plane wrinkles. Experimental evaluations and finite element modeling were conducted to better understand the relationship between eddy-current density and defect detection. The findings suggest that the probe configuration with an asymmetric driver coil and differential pickup coils shows the best capability for wrinkle detection.
COMPOSITES PART B-ENGINEERING
(2024)
