Article
Polymer Science
Chenping Zhang, Yugang Duan, Hong Xiao, Ben Wang, Yueke Ming, Yansong Zhu, Fugan Zhang
Summary: This paper investigates the interlaminar bond strength of laser in-situ consolidation CF/PEEK thermoplastic composites. The results show that porosity significantly affects the interlaminar shear strength, while there is no correlation between crystallinity and interlaminar shear strength. The interlaminar shear strength in the heated tool in-situ consolidation group is significantly higher than the constant pressure in-situ consolidation group.
Article
Materials Science, Composites
Wei Fan, Hua Yang, Ambrose C. Taylor
Summary: A numerical model based on crack phase field analysis was used to investigate the quasi-static fracture process in interpenetrating phase composites (IPCs). The study found that tougher and stiffer tougheners result in more fracture in the brittle phase, but less fracture in the toughening phase, leading to a competition between increasing breakage in the brittle phase and declining breakage in the toughening phase. The study also identified various crack propagation patterns and compared fracture in different microstructures.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Zixuan Chen, Tianyu Yu, Yun-Hae Kim, Zetian Yang, Yan Li, Tao Yu
Summary: This study aims to investigate the mechanical properties of basalt fiber reinforced polymers (BFRPs) with the incorporation of different structured nanoclays, and to improve their interfacial bonding through experimental methods. The results show that a flattened nanoclay structure is more effective for enhancing the modulus, and the inclusion of different structured nanoclays also improves the interlaminar strength and toughness of BFRPs.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zheqi Peng, Xin Wang, Lining Ding, Zhishen Wu
Summary: This study adopts a bundle-based concept to model unidirectional hybrid fiber-reinforced polymer composites and conducts a parametric study and optimization framework development. The results show that a dispersed arrangement of fiber bundles can delay damage propagation and enhance overall performance.
MATERIALS & DESIGN
(2022)
Article
Mechanics
Yuhao Lian, Fuqiang Wu, Yalin Han
Summary: This paper quantifies the inconsistency of mechanical uncertainty between composite mechanical test panels and components using the resampling method. It establishes a fast prediction method for structural uncertainty by introducing resampling method and 3D random field into the Monte-Carlo simulation framework. Three sets of laminate strength experiments were conducted to verify the analysis architecture, and the results showed good agreement with the experimental ones. Some intelligent algorithms regarding applications of the 3D random field are also addressed.
COMPOSITE STRUCTURES
(2023)
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
Polymer Science
Miroslav Cerny, Josef Petrus, Ivana Chamradova
Summary: This work focuses on describing the mechanical behavior of porous filled composites without simulations or exact physical models. It proposes a mathematical approach involving fitting and interpolation of structural parameters to determine the mechanical properties of the composites.
Article
Engineering, Manufacturing
Congmei Lin, Yushi Wen, Liyuan Wei, Ruqin Liu, Xiaoqing Tu, Shiliang Huang, Cui Zhang, Wen Qian, Liangfei Bai, Liang Chen, Feiyan Gong, Ling Ding, Jianhu Zhang, Zhijian Yang
Summary: Precise dimension control during the thermal cycle is challenging for polymer bonded energetic composites. A general strategy of coating negative thermal expansion (NTE) nanoparticles with dopamine has been developed to achieve homogeneous dispersion and improved interaction in the composites. The resulting composites exhibit suppressed thermal expansion, enhanced thermal stability, and improved mechanical properties.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
Yingze Li, Naiyu Jiang, Nuo Xu, Hongyan Zhang, Nan Zhou, Xiaohu Zou, Yanxiang Zhang, Dongxing Zhang
Summary: This study proposes a facile and effective method to improve the interface of carbon fiber/poly ether ether ketone composites by grafting carbon nanotubes onto hydroxylated boron nitride and preparing sizing agents with polyetherimide. The introduction of the sizing agents provides abundant functional groups, generating hydrogen bonds and pi-pi interaction at the interface, while also improving surface roughness and mechanical interlocking. This method shows great potential for fabricating high-performance CF/PEEK composites.
COMPOSITES COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Yingze Li, Nuo Xu, Hanxiong Lyu, Naiyu Jiang, Hongyan Zhang, Nan Zhou, Dongxing Zhang
Summary: In this study, a mixture sizing agent containing hydroxylated boron nitride and polyetherimide was synthesized to improve the interfacial adhesion between carbon fiber and polyetheretherketone. The synergistic effects of hydrogen bonding, 7C-7C interaction, and good compatibility were evaluated to enhance the miscibility, mechanical properties, and tribological properties of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Jing-Jing Lu, Ji-Peng Guan, Hong-Quan Wang, Rui-Qiong Dang, Meng-Xuan Fan, Song-Qing Zhu, Xiao-Jun Shen
Summary: In order to improve the performance of lightweight and high-strength composites in deep-sea environment, epoxy resin and hollow glass beads were used, with graphene oxide to enhance the interfacial adhesion. The results showed that the mechanical properties of the composites were improved after treatments with high-pressure and low-temperature seawater, making them more suitable for deep-sea applications.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Pritam Kulkarni, Kiran D. Mali, Sandeep Singh
Summary: This study examined the performance of unidirectional and quasi-isotropic carbon fiber reinforced polymer composite laminate with uniform and non-uniform out-of-plane waviness defects. Experimental tests and numerical simulations were conducted to investigate failure loads and damage mechanisms for different waviness cases. The findings showed a good agreement between experimental observations and finite element simulation results.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Alexander Poellinger, Thomas Koch, Stefan Krenn, Fabian Wilde, Domonkos Tolnai, Bernhard Plank, Sarah Heupl, Johannes Bernardi, Karin Whitmore, Marc Langela, Sandra Seichter, Michael Schoebel
Summary: Efficient transport of hydrogen is crucial for the widespread adoption of renewable energy. Reciprocating piston compressors with high strength non-lubricated sealing solutions are key technologies to meet the demands for gas purity and high-pressure gradients in hydrogen applications.
Article
Engineering, Manufacturing
Zheng Liu, Xiaoli Fan, Junliang Zhang, Zhiyong Yang, Yusheng Tang, Jianwei Li, Jie Kong, Junwei Gu
Summary: The introduction of hyperbranched structure and fluorine groups in epoxy-preFHBPBO significantly improved the mechanical properties and wave-transparent performance of PBO fibers reinforced BADCy resins composites. The addition of 7 wt% epoxy-preFHBPBO increased the flexural strength and interlaminar shear strength, while reducing dielectric constant and dielectric loss compared to PBO fibers/BADCy composites. Moreover, the volume resistivity and breakdown strength were also enhanced in PBO fibers/FHBPBO-co-BADCy composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Qi Zhang, Zhangjie Yu, Zhengzheng Dai, Guangming Zhou, Deng'an Cai
Summary: This study analyzed the failure process of two different types of composite frame joints and found that the strength of joints reinforced with high-lock bolts and adhesive showed a significant improvement.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Multidisciplinary Sciences
Youngjin Seo, Dongkyoung Lee, Sukhoon Pyo
Summary: This study evaluates the cutting characteristics of intrusive rocks through laser cutting, and analyzes and characterizes them using geometrical measurements and element mapping, among others.
SCIENTIFIC REPORTS
(2022)
Article
Acoustics
Kebede A. Moges, Sungwoo Park, Sukhoon Pyo
Summary: Surface perforated mortar (SPM) is a cement-based acoustic material that can reduce railway noise. This paper investigates the effect of micro-sized pores on the sound absorption performance of SPM and proposes design guidelines based on experimental studies.
Article
Construction & Building Technology
Sungwoo Park, Seunghee Park, Solmoi Park, Sukhoon Pyo
Summary: Hybrid alkaline cement composites (HACC) are developed to overcome the low compressive strength of hybrid alkaline cement. The characteristics and microstructure of HACC are examined to understand its strength-developing mechanism.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Prabhat Vashistha, Yanchen Oinam, Hyeong-Ki Kim, Sukhoon Pyo
Summary: The objective of this study is to investigate the reactivity and hydration behavior of thermo-mechanically activated waste concrete powder (WCP). Through the process of burning and mechanical grinding, the activated WCP demonstrates improved reactivity and hydration compared to ordinary Portland cement (OPC). Activated WCP can effectively enhance the reactivity of cement mixtures and develop comparable compressive strength to OPC. Additionally, replacing a portion of OPC with activated WCP can reduce CO2 emissions, mineral resources consumption, and energy consumption.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Siyu Wu, Sukhoon Pyo
Summary: Recently, microparticles have been shown to enhance the damping performance of cementitious composites, evaluated by the damping loss factor. Although previous studies have analyzed the damping loss factors of microparticle-reinforced composites to determine optimal mixing proportions, there is currently no efficient numerical analysis method available. Here, a micromechanical three-phase model and finite element strain energy method were applied to analyze the damping loss factor of cementitious composites reinforced with hollow sphere and flake-shaped microparticles. This research demonstrates that the finite element strain energy method can effectively estimate the damping loss factor of cementitious composites with microparticles, with less than 0.1% error between experimental and simulation results.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Sungwoo Park, Mang Muan Lian, Dongkyoung Lee, Sukhoon Pyo
Summary: This study explored the resistance of a hybrid alkaline cement composite (HACC) to laser cutting. HACC, made from geopolymer and cement paste, has the potential for rapid construction or repair due to its quicker setting and higher compressive strength compared to cement paste. Laser cutting is an increasingly popular fabrication method known for its low dust and noise production and fast operation. The study performed laser-cutting experiments on HACCs with varying cement paste contents to investigate the structural changes after laser treatment. Results showed that sodium aluminosilicate hydrate gels exhibited better resistance to laser cutting than calcium (alkali) aluminosilicate hydrate and calcium silicate hydrate gels due to their chemical and physical properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Prabhat Vashistha, Kebede A. Moges, Sukhoon Pyo
Summary: This study found that the application of lime mud (LM) in construction materials is economically sustainable, energy-efficient, and environmentally beneficial. By using a 2 M NaOH solution, LM can be dissolved and form more reactive calcium hydroxide and carbonates. The activated LM showed improved reactivity and compressive strength compared to untreated LM when mixed with ground granulated blast furnace slag (GGBFS) and silica fume.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
Article
Construction & Building Technology
Suhawn Ju, Sungjun Bae, Jueun Jung, Sungwoo Park, Sukhoon Pyo
Summary: This research proposes the use of coal bottom ash (CBA) in metakaolin-based geopolymers. By treating CBA with an alkaline solution and mixing it with metakaolin, the proposed method minimizes the degrading effect of CBA on the compressive strength of geopolymers. The study shows that this method can accommodate a larger amount of CBA and achieve higher compressive strength compared to the conventional mixing method.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jinyoung Yoon, Hyunjun Kim, Suhwan Ju, Zhanzhao Li, Sukhoon Pyo
Summary: This study presents a framework that uses point cloud analysis and machine learning to automate and accelerate the characterization of fresh properties of cementitious materials. The framework collects point cloud data with a depth camera and extracts diameter, height, and curvature information through post-processing techniques. Data augmentation technique is used to generate new data for training the artificial neural network (ANN) based on the nonlinear correlations between these parameters and experimentally determined fresh properties. The developed framework is validated with additional experimental results and shows high prediction accuracy, providing a rapid and effective approach for characterizing fresh properties of cementitious materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Mandip Dahal, Sungwoo Park, Sukhoon Pyo
Summary: This study proposes a new method for measuring the air permeability of materials under extreme vacuum conditions and tests it on cement-based materials. The results show that ultra-high performance concrete has significantly lower air permeability than other cement-based materials in vacuum conditions, which is important for the design of Hyperloop tube structures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Yanchen Oinam, Suhawn Ju, Myoungsu Shin, Sukhoon Pyo
Summary: This study investigates the influence of natural cellulose fibers (NCFs) on improving the hydration characteristics of cementless ultra-high performance concrete (UHPC) using CaO-activated ground granulated blast furnace slag (GGBFS). The addition of NCFs as an internal-curing agent enhances the formation of hydration products and increases the reactivity of unhydrated phases. The compressive and tensile strengths of the UHPC are not compromised but slightly improved with the incorporation of NCFs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Kebede A. Moges, Sukhoon Pyo
Summary: Lime mud, a byproduct of the paper industry, has been investigated as a supplementary material for cement. In this study, high replacement ratios of sand with lime mud, combined with silica fume, were used to improve the strength of mortar. The experimental results showed significant improvements in compressive and flexural strength.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Siyu Wu, Kebede Alemayehu Moges, Prabhat Vashistha, Sukhoon Pyo
Summary: This study developed a material that can maintain compressive strength while increasing porosity and extending the setting time. By using fly ash-based foam geopolymers and limestone calcined clay cement, the material achieved the desired properties and reduced CO2 emissions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Construction & Building Technology
Mandip Dahal, Yanchen Oinam, Prabhat Vashistha, Jae-Eun Oh, Sukhoon Pyo
Summary: This study proposes a novel method to develop cementless ultra-high performance concrete (UHPC) by activating ground granulated blast furnace slag (GGBFS) without an alkaline-activating solution. Calcium oxide (CaO) was used to activate GGBFS, and calcium formate (CF) was added as an accelerator. The addition of CF improved the mechanical properties and reduced CO2 emissions compared to cement-based UHPC.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Prabhat Vashistha, Yanchen Oinam, Sukhoon Pyo
Summary: The aim of this study is to utilize waste concrete powder as cementitious material and investigate the impact of silica fume on its reactivity and hydration characteristics. The combination of activated waste concrete powder and silica fume improved the reactivity and achieved comparable compressive strength to cement, while reducing carbon dioxide emissions.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
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)
