Article
Materials Science, Composites
Haithem Bel Haj Frej, Romain Leger, Didier Perrin, Patrick Ienny
Summary: This study investigates and compares the effects of hydrothermal aging on carbon fibre / Elium (TM) thermoplastic composite and on carbon fibre / vinylester thermoset composite for marine application. The results show that both materials exhibit changes in mechanical properties after aging, but have different diffusion behaviors.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Mechanics
Felice Rubino, Hetal Parmar, Tommaso Mancia, Pierpaolo Carlone
Summary: A glass fiber/polypropylene semi-impregnated lamina was added to improve the weldability of an epoxy laminate. Ultrasonic welding of the hybrid composite was performed with varying welding parameters, resulting in different lap-shear strengths and weld interface qualities. The welding time had a significant influence on the intermixing of the thermoplastic layer and the formation of a strong weld area, while the amplitude and pressure mainly affected the power absorption and overall welding performance.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Bo Li, Xiaoqian Xu, Dengxun Ren, Zexu Fan, Mingzhen Xu
Summary: In this study, a BA-ph/BPA-PEN composite film was prepared by modifying BA-ph resin with BPA-PEN. The introduction of BPA-PEN facilitated the polymerization reaction of BA-ph resin and directly affected the polymerization reaction of the benzoxazine ring and the cross-linking reaction of the nitrile group. The increase in BPA-PEN content led to the appearance of a phase reversion structure, promoting the improvement of mechanical properties. The system exhibited good thermal performance, with a higher Td5 and char yield compared to the pure BA-ph system.
COMPOSITES COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Yannick Bloessl, Gergely Hegedus, Gabor Szebenyi, Tamas Tabi, Ralf Schledjewski, Tibor Czigany
Summary: This article explores the use of fiber Bragg grating sensors in resin transfer molding processes for cure monitoring, focusing on the correlation between strain response and the actual cure state of the resin system. By testing different installation approaches and analyzing the strain changes related to sol-gel conversion of the thermoset polymer, the study demonstrates the capability of providing in-situ information of the cure state beyond the gelation point with the most reliable strain response achieved by installing the sensor inside a controllable, capsuled resin volume.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2021)
Article
Materials Science, Composites
Lorena Saitta, Vishnu Prasad, Claudio Tosto, Neal Murphy, Alojz Ivankovic, Gianluca Cicala, Gennaro Scarselli
Summary: The study focuses on composite fabrication, characterization, and recyclability of biobased polymer resins reinforced with flax fiber. By selecting different biobased resins and evaluating their mechanical properties, an epoxy resin cured with a cleavable hardener is found to have the highest glass transition temperature, ensuring full recyclability. The study also demonstrates the possibility of separating and recovering fibers and resin from composite panels through a specific chemical process.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Panuwat Luengrojanakul, Phattharin Mora, Kittipon Bunyanuwat, Chanchira Jubsilp, Sarawut Rimdusit
Summary: Shape-memory carbon fiber polymer composites reinforced with graphene nanoplatelets were prepared and their performance was analyzed. The results showed that the addition of the nanoplatelets improved the strength, modulus, and shape-memory effect of the composites. However, at higher fiber mass fractions, the performance decreased.
Article
Mechanics
T. Gobikannan, A. Portela, A. K. Haldar, N. H. Nash, C. Bachour, I Manolakis, A. J. Comer
Summary: The study evaluates a new reactive thermoplastic resin for potential application in marine vessels over 50m in length, showing competitive flexural properties with traditional resin systems. The strength reduction and failure modes in dry, wet, and diesel conditions were similar to epoxy, with a negligible reduction in modulus in water and less than 10% reduction in diesel.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Shuai Zhang, Ao Yang, Junwen Ren, Yu Liu, Rui Han
Summary: In this study, a thermosetting resin was used to prepare hydrogels with high compressive strength and responsiveness. The addition of conductive and magnetic fillers resulted in composite hydrogels with good electromagnetic shielding performance.
Article
Materials Science, Composites
Magnus Gebhardt, Ioannis Manolakis, Gerhard Kalinka, Joachim Deubener, Souvik Chakraborty, Dieter Meiners
Summary: The study evaluated the potential of reusing recovered carbon fiber fabrics in manufacturing 2nd generation composite laminates, which showed an increase in damping attributed to a residual thermoplastic layer on the fibers. Additionally, the interfacial adhesion of the 2nd generation composites appears to be less influenced by the type of matrix used.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
Toshihira Irisawa, Reika Aratake, Miho Hanai, Yoshiki Sugimoto, Yasuhiro Tanabe
Summary: The study investigated the optimal conditions for recovering recycled carbon fiber from epoxy matrix CFRP through thermal decomposition, emphasizing the need for an oxidizing atmosphere and the impact of treatment temperature and time on fiber damage. It was found that the strength reduction of the recovered carbon fiber was influenced not only by thermal oxidative decomposition, but also by its interaction with the resin, with recovery time depending on treatment temperature and the location of the fiber in CFRP.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Jong-Ho Back, Chiwon Hwang, Dooyoung Baek, Dongwoo Kim, Youngchang Yu, Wonjoo Lee, Hyun-Joong Kim
Summary: This study investigates epoxy composites with tunable mechanical properties, including toughened polymers, elastomers, and pressure-sensitive adhesives, by adjusting the ratio of different types of epoxy resins. The results show that these epoxy composites can be used in structural adhesives and flexible electronics, exhibiting performance comparable to traditional tapes.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xi Yang, Yindong Wang, Xiaokang Zhang, Zhiwen Jian, Xili Lu, Zhanhua Wang, Hesheng Xia
Summary: In this study, acylsemicarbazide (ASC) moieties are introduced into a network to obtain a dynamic reversible cross-linked thermoset epoxy resin. The optimized epoxy resin shows excellent reprocessing performance and can be used to prepare carbon fiber reinforced polymer composites. The study provides a solution for recycling carbon fiber composites in line with a circular economy.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Composites
Wencai Dong, Chonggao Bao, Wenqi Lu, Rongzhen Liu, Haiqiang Ma, Shijia Li, Kun Sun
Summary: An in situ-curing 3D printing technology was developed, which involved resin impregnation, 3D printing/pre-curing, and post-curing processes. Continuous carbon fiber-reinforced thermosetting phenolic resin (CF/PF) composites were successfully fabricated. The selection of the pre-curing temperature was crucial for the printing process. The deviation distances of the prepregs, degrees of curing, and defect volumes of the composites were used to determine the appropriate pre-curing temperature. With a pre-curing temperature of 260 degrees C, the printed CF/PF composites showed optimal mechanical properties with minimal defects.
COMPOSITES COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Mostafa Shahabi, Sorour Movahedi Fazel, Abdolrasoul Rangrazi
Summary: This study investigated the effects of adding chitosan nanoparticles to cold-cure orthodontic acrylic resin on its mechanical properties. The results showed that adding up to 1% chitosan NPs had no significant negative effects on the flexural and compressive strength of the resin.
Article
Engineering, Manufacturing
Zixuan Lei, Jian Wang, Chi Zhang, Jian Li, Yuhong Liu
Summary: By controlling the volume fraction of different regions, the load transfer efficiency and chain segment mobility of novolac phenolic nanocomposites can be effectively improved. In 0.5%GESNH-5, the volume fractions of the bricks in mortar structure and the constrained region promote load transfer and chain segment mobility, resulting in enhanced mechanical properties and toughness of the material.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
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)