Article
Materials Science, Composites
Dengkang Guo, Sheng Yang, Feng Fu, Gaiyun Li, Fuxiang Chu
Summary: In this study, an ultra-high-strength compressed wood-epoxy polymer composite (CWEPC) was prepared, and its mechanical properties were significantly improved compared to natural wood, with no waste generated during the preparation process.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Composites
Dengkang Guo, Sheng Yang, Feng Fu, Gaiyun Li, Fuxiang Chu
Summary: This study prepared an ultra-high-strength compressed wood-epoxy polymer composite by selective compression and epoxy monomer impregnation, significantly improving the mechanical properties compared to natural wood.
COMPOSITES COMMUNICATIONS
(2022)
Article
Materials Science, Paper & Wood
Tiantian Yang, Haomin Zhong, Chuang Xu, Dan Luo, Changtong Mei
Summary: In order to improve the hydrophobicity, dimensional stability and mechanical properties of fast-growing poplar wood, wood-polymer composites (WDPF) were fabricated by introducing furfuryl alcohol (FA) and polyvinyl alcohol (PVA) into wood cells after delignification. The results showed that delignification increased wood porosity and facilitated polymer impregnation and distribution. The introduction of hydrophobic FA and PVA reduced water accommodation and hindered wood-water interaction, resulting in enhanced hydrophobicity and dimensional stability. WDPF exhibited improved flexural strength, modulus of elasticity, and impact toughness compared to furfurylated wood. The mechanical property improvement was attributed to the interaction between PVA and FA, as well as the delignification process. The fabrication and mechanism analysis of WDPF can serve as a reference for upgrading low-quality wood products.
Article
Forestry
Dengkang Guo, Sheng Yang, Feng Fu, Nai Guo, Gaiyun Li, Fuxiang Chu
Summary: A novel method based on the in situ reaction of a hydrophilic epoxy monomer in wood cell walls was proposed to improve the performance of fast-growing plantation wood. The modified wood showed notable improvements in dimensional stability, fungal decay resistance, and compressive strength.
WOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Gergely Czel, Marton Bugar-Meszaros, Michael R. Wisnom
Summary: Two types of hybrid composite specimens with glass/carbon fiber-epoxy interlayer were studied, one with continuous carbon layer and the other with discontinuous carbon layer. The tensile and interlaminar properties of the hybrid composites were tested at different temperatures and under different conditions to investigate their temperature dependency and moisture sensitivity. The results showed that the tensile response of the continuous specimens was not influenced by temperature, while the discontinuous specimens delaminated at the glass/carbon interface. Increasing the test temperature led to a significant decrease in the mode II fracture toughness of the glass/carbon hybrid composites. The presence of moisture changed the behavior of both types of hybrid composites, causing unstable delamination and glass fiber failure due to the decreased strength of the S-glass/epoxy layers.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Qihui Chen, Zhiyuan Jiang, Xiaoxin Pei, Yaqing Liu, Ruikui Du, Guizhe Zhao
Summary: Inspired by wood sponge and lamellar structure, delignified wood was introduced into epoxy to improve fracture toughness. Anisotropic biocomposites exhibit significantly increased K-JC values compared to neat epoxy resin, with excellent mechanical properties due to micro-cracks and crack deflection induced by the wood layer.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Kang Yang, Zihong Wu, Changgeng Zhou, Siyu Cai, Zhentao Wu, Wenhan Tian, Sujun Wu, Robert O. Ritchie, Juan Guan
Summary: Natural silk fibre can enhance the toughness and impact strength of composites when reinforced in polymer matrices, with the epoxy resin derived from bisphenol-A epoxy and aliphatic diamine precursors showing the highest performance in terms of tensile breaking energy and impact strength. The toughening mechanisms in these composites are mainly crack propagation and fiber pull-out, regardless of whether the matrix is brittle or ductile. The study aims to provide guidelines for designing matrices in silk fibre-reinforced plastics with optimal toughness by identifying key toughening mechanisms.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Duo Chen, Juanzi Li, Wenxuan Yin, Yuhuan Yuan, Yunguang Cui, Shichao Li, Minjing Liu, Cong Peng, Xin Liu, Jinrui Ye, Zhanjun Wu
Summary: In this paper, a new type of thermoplastic epoxy matrix was used to prepare highly recyclable carbon fiber reinforced composites. The experimental results showed that the composites exhibited excellent mechanical properties and could be easily and rapidly recycled at room temperature.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Vinayak S. Uppin, P. S. Shivakumar Gouda, M. I. Kittur, A. Andriyana, B. C. Ang, Bisma Parveez, Irfan Anjum Badruddin, Syed Javed, Sarfaraz Kamangar
Summary: Graphene oxide (GO) reinforcement in glass-epoxy composites can improve their mechanical and wear properties, but it leads to changes in some properties, such as a decrease in tensile modulus, an increase in tensile strength, and a shift in glass transition temperature (Tg). By developing a damage model and conducting microscopic observations, the stress-strain behavior and failure mechanisms of this composite material can be better understood.
Review
Polymer Science
Sanjeev Kumar, Lalta Prasad, Vinay Kumar Patel, Virendra Kumar, Anil Kumar, Anshul Yadav, Jerzy Winczek
Summary: This paper reviews the characteristics and advantages of lightweight and high-strength materials fabricated from natural leaf fibers. It discusses the effects of fiber loading and fiber length on the performance of composite materials, as well as the role of surface modification and silane treatment in improving composite properties.
Article
Chemistry, Multidisciplinary
Zhenyu Zhang, Yuefeng Du, Chunhua Zhu, Liangchao Guo, Yao Lu, Jinhong Yu, Ivan P. Parkin, Junhua Zhao, Dongming Guo
Summary: This study developed novel ER/graphene composites, showing that the wear resistance with 5 wt% graphene content was significantly higher than pure ER. The enhancement mechanisms of graphene reinforcement were determined by molecular dynamics simulations.
Article
Materials Science, Composites
Keyredin Selman, Kiran Shahapurkar, Venkatesh Chenrayan, Mohammed A. Alamir, Ibrahim M. Alarifi, Vineet Tirth, Abdulaziz H. Alghtani, Ali Algahtani, Tawfiq Al-Mughanam
Summary: This study investigates a novel composite consisting of Kulkual fibers and Titanium diboride (TiB2) filler reinforced epoxy composites. Kulkual, also known as Opuntia ficus-indica, is a plant plentifully found in Ethiopia and is utilized in the form of fibers along with TiB2 as reinforcement for synthesizing epoxy matrix composites. Six types of composites with varying content of Kulkual fibers and fixed TiB2 content are fabricated and their mechanical properties are evaluated. The results show that the addition of Kulkual fibers improves the tensile and flexural properties of the composites, with the EK-10 composite exhibiting the greatest improvement. Fractured surfaces are also analyzed to identify the structure-property relationships.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Ping Han, Lina Yang, Susu Zhang, Zheng Gu
Summary: By constructing a gradient modulus interfacial microstructure on the carbon fiber surface, the interfacial and mechanical properties of carbon fiber-reinforced polymer-matrix composites (CFRPs) can be significantly improved by chemically grafting a self-assembly carboxyl-terminated hyperbranched polymer (HP-COOH). This work provides a facile and efficient strategy for constructing a superior and versatile interface for high-performance composites.
Article
Polymer Science
Antonella Patti, Gianluca Cicala, Stefano Acierno
Summary: The study found that adding wood flour as a filler to recycled polyethylene leads to increased viscosity and thermal degradation with increasing wood loading. However, the material still shows good thermal stability within a certain temperature range.
Article
Nanoscience & Nanotechnology
Zoriana Demchuk, Jiadeng Zhu, Bingrui Li, Xiao Zhao, Nurul Md. Islam, Vera Bocharova, Guang Yang, Hongyu Zhou, Yijie Jiang, Wonbong Choi, Rigoberto Advincula, Peng-Fei Cao
Summary: In this study, the improved interfacial adhesion of CF/epoxy composites by covalent bonding is reported. The result shows that this method enhances the mechanical properties and thermal aging performance of the composites. Raman mapping and finite elemental analysis demonstrate the improvement of interfacial strength and toughness by chemical treatment of CFs, suggesting the high potential of surface modification of inorganic fillers for polymer composites with tunable properties for different applications.
ACS APPLIED MATERIALS & INTERFACES
(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)