Article
Engineering, Manufacturing
E. Santana de Vega, G. Allegri, B. Zhang, I. Hamerton, S. R. Hallett
Summary: This paper presents a characterization of the effect of varying the polymer matrix in Z-pin through-thickness reinforcement in pre-preg based laminates. The experimental results indicate that Z-pins with a high elongation at break, such as LTG Z-pins, exhibit superior bridging performance and toughness.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Boxue Chen, Yi Zhang, Chi Mao, Yu Gan, Bolun Li, Haopeng Cai
Summary: This study fabricated rapid self-healing carbon fiber/epoxy composites by using core-shell nanofiber as a healing agent, which can efficiently fill and completely heal the damaged region.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Composites
Zhe Che, Min Li, Shuo Wang, Shaokai Wang, Yizhuo Gu, Wei Zhang
Summary: This study improves the shear delamination resistance of composite laminate and enhances crack propagation resistance by using fine z-pins. The results demonstrate that z-pinning plays a significant role in improving interlaminar fracture toughness, and decreasing the z-pin diameter further enhances the resistance to crack propagation.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Bing Zhang, Stephen R. Hallett, Giuliano Allegri
Summary: This paper explores a novel technique for sensing delamination in through-thickness reinforced composites using electromagnetic induction. By utilizing ferromagnetic Z-pins and coils, this method is able to avoid potential interferences from contact electrical resistances and has been demonstrated to be viable in bridging tests. The sensitivity of the magnetic-based sensing technique increases with loading rate and is capable of detecting both mode I and mode II delamination events.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Sangwook Sihn, Jeremey Pitz, Jonathan P. Vernon
Summary: Despite previous research, minimal attention has been given to the effects of temperature on the mechanical performance of carbon fiber reinforced polymer composites. This study investigates the impact of higher heat fluxes and increased heating rates on plain-woven composites, revealing the importance of delamination events and the use of appropriate kinetic models to account for temperature-dependent thermal responses and damage behaviors in the composites.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Laszlo Jozsef Varga, Tamas Barany
Summary: The study examined polypropylene-based single-polymer composites (SPCs) utilizing APAOs as matrices and polypropylene fabrics as reinforcement. The composites exhibited good static and dynamic properties with optimal consolidation temperature between 120-140 degrees C, while stronger fabrics improved mechanical properties. APAOs widened the processing temperature window and the SPCs possessed numerous beneficial properties.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Xuebei Teng, Yingjie Xu, Weihong Zhang, Weiwei Liu, Mingxin Yin
Summary: In this study, the resistance of delamination in curved carbon fiber/epoxy composite laminates reinforced by z-pins was experimentally investigated. A cost-effective pre-hole z-pinning technique was applied to mitigate initial in-plane damage, and the effect of z-pin volume fraction and diameter on interlaminar fracture toughness and bridging behavior was evaluated through double cantilever beam testing. The mode-mixity of z-pin was determined, and the fracture toughness of curved specimens was calculated based on Timoshenko curved beam theory. The results showed that the mode-mixity varied depending on the location of z-pins, and z-pins experienced a combination of crack opening and crack sliding loads during the tests. The primary failure mode of z-pins was pull-out, with a minor portion experiencing fracture. The fracture toughness of specimens with 0.8 vol% z-pins was significantly higher compared to unpinned specimens, indicating the delamination resistance capacity of z-pins was influenced by the mixed-mode ratio.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Liaojun Yao, Hao Cui, Licheng Guo, Yi Sun
Summary: A new total fatigue life model for delamination growth in composites has been proposed in this study, which can appropriately characterize the FDG behavior under various fatigue loading conditions. By obtaining master resistance curves, the FDG behavior under different R-ratios can be determined, with these curves shifting downwards with mode mixity changes.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Vistasp M. Karbhari, Guijun Xian, SoonKook Hong
Summary: The study investigated the thermo-oxidative resistance of a wet layup ambient cured carbonepoxy composite using dynamic scanning calorimetry, dynamic mechanical thermal analysis, and thermo-gravimetric analysis. Results showed that exposure to higher temperatures and longer periods of time led to deterioration of the thermal characteristics of the composite, while exposure at lower temperatures did not show degradation within the 72-hour period.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Mathew W. Joosten, Carlos G. Davila, Qingda Yang
Summary: A computationally efficient fatigue analysis methodology is proposed that can predict the initiation and propagation of cracks using a cycle jump approach and a unified local fatigue cohesive zone model. The results of verification and validation experiments indicate that this method can reproduce fatigue damage initiation and evolution for different configurations and load combinations.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Eduardo Szpoganicz, Martin Demleitner, Fabian Huebner, Youngseok Oh, Youngdo Kweon, Hyojae Lee, Volker Altstaedt, Holger Ruckdaeschel
Summary: In this study, an empirical correlation between the tack of phenolic prepregs and the rheological state of the base resin was established through multivariable analyses. The interaction between resin and filler was found to effectively change the resin viscosity, regulating the prepreg tackiness level. By systematically varying the conversion state and operating temperature, inherent phenolic resin properties were thoroughly determined to understand their impact on final composite tack property.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Baoming Wang, Shengzong Ci, Mingzhe Zhou, Chengrui Di, Junwei Yu, Bo Zhu, Kun Qiao
Summary: In this study, the ageing mechanisms and moisture absorption behavior of epoxy resins and carbon fiber composites were investigated. The results showed that the ageing process primarily involved physical adsorption of water, which did not significantly affect the chemical structure and microstructure. The absorbed water caused micro-cracks at the fiber-resin interface, weakening the interfacial strength and reducing the mechanical properties of the composites.
Article
Engineering, Multidisciplinary
Jessica Passaro, Claudio Imparato, Dambarudhar Parida, Aurelio Bifulco, Francesco Branda, Antonio Aronne
Summary: The manufacturing of non-woven fibrous composites by electrospinning is being widely used in catalysis, adsorption, and water purification applications. In this study, silica nanoparticles and TiO2acac microparticles were synthesized and electrospun with PVP to obtain ternary composite mats. It was found that the addition of TiO2acac microparticles can enhance the performance of the composite mats, such as improving oxidative degradation activity and the removal efficiency of organic dyes.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
V Fiore, L. Calabrese, R. Miranda, D. Badagliacco, C. Sanfilippo, D. Palamara, A. Valenza, E. Proverbio
Summary: The study revealed that flax fiber reinforced composites experienced a certain degree of recovery in marine environment, with their performance mainly influenced by reversible aging phenomena, while the recovery of flexural strength was particularly significant.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Polymer Science
Yuxi Shen, Alia Gallet-Pandelle, Hiroki Kurita, Fumio Narita
Summary: The study demonstrated that adding a surface-active agent and basalt fibers can significantly improve the mechanical properties of cellulose acetate composites, while the arrangement of fibers also affects this effect. Photodecomposition experiments showed that the photocatalyst also has a certain impact on the decomposition of materials.
Article
Engineering, Manufacturing
Wenwu Zhang, Helezi Zhou, Bin Huang, Huamin Zhou, Xiongqi Peng
Summary: This paper investigates the tool-ply friction behavior of jute/PLA biocomposites in thermoforming. A pull-through friction testing device was developed to characterize the tool-ply friction behavior of jute/PLA prepreg at elevated temperature. The effects of alkali treatment, fiber orientation, normal force, and slipping velocity were studied, and a quantitative definition of tool-ply friction behavior was achieved. The results indicate a strong relationship between tool-ply friction behavior and woven and fiber structures, indicating hydrodynamic lubrication.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Stephen Clay, Wesley Ault, Alex Faupel, Caglar Oskay, Philip Knoth, Noam N. Y. Shemesh, Rami Haj-Ali, Uri Breiman, Ido Meshi, Ofir Shor
Summary: This paper presents an experimental investigation on the compression failure mechanisms of laminated carbon fiber reinforced composites under non-standard quasi-static loading. The results demonstrate the presence of interior kink bands, surface ply splitting, and delaminations, with each failure mechanism associated with different stress levels.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Bowen Zeng, Jinlong Yang, Zhi Ni, Yucheng Fan, Ziyan Hang, Chuang Feng
Summary: This study successfully improved the pyroelectric properties of PVDF films by preparing functionally graded graphene nanoplatelet (FG-GNP) reinforced PVDF composite films. The increase in the number of layers and the concentration of GNP near the surface of the composite film were found to enhance the pyroelectric properties and temperature stability.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Shenghe Zhang, Fukai Chu, Weizhao Hu, Bibo Wang, Richard K. K. Yuen, Yuan Hu
Summary: This study improves the flame retardancy and mechanical properties of PBAT by synthesizing a phosphorus-containing intercalator and mixing it into the PBAT matrix.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Tharan Gordon, Michael R. Wisnom, Byung Chul Kim
Summary: Thickness tapering is a common strategy for efficient and lightweight composite structures, but it can introduce delamination sites. This study investigated the use of ply scarfing method to improve the compressive failure stress of tapered laminates made from thick unidirectional non-crimp fabrics. The results showed that ply scarfing suppressed delamination and increased the failure stress by 60%.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Xin Wang, Yiting Qu, Junlei Bai, Fujun Xu, Bin Ding, Xiaohua Zhang
Summary: A solution-based strategy is proposed to achieve a strong bond between fibers and matrix in powder materials, resulting in improved mechanical properties, thermal conductivity, and fracture strain of the composites. The method also offers advantages such as enhanced powder flowability and thermal stability.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Xing Zhou, Guosheng Wang, Dexiang Li, Qi Wang, Keming Zhu, Yaya Hao, Yueyang Xu, Neng Li
Summary: This study successfully synthesized polyurethane elastomer by using degraded products from waste PET, and fabricated composites with carbon nanotubes for strain sensors. The composites showed good mechanical and durability performance, indicating a potential method for recycling waste PET into valuable and functional materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Fei Peng, Tingting Shan, Rongrui Chen, Jiulong Shi, Di Liu, Guoqiang Zheng, Chaojun Gao, Kun Dai, Chuntai Liu, Changyu Shen
Summary: Janus polymer films with distinct surface performance and potential applications were successfully prepared by vacuum-assisted hot-compressing method and spray coating. These films exhibit decent actuation performance and rapid selfpowered sensing property, and can be used for real-time acetone monitoring system.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Biao Cheng, Huafeng Quan, Yuefeng Zhang, Dong Huang, Tongqi Li, Chong Ye, Xingming Zhou, Zhen Fan, Yafang Zhang, Ting Ouyang, Fei Han, Hongbo Liu, Jinshui Liu
Summary: In this study, a binary graphite network was constructed to improve the thermal conductivity and control the formation of micrometer-scale open pores in phase change composites. The developed composites showed a high thermal conductivity and phase change enthalpy, making them promising for thermal control in space optical-mechanical systems and other critical aerospace components.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Shihao Zuo, Fei Cheng, Guangming Yang, Jiangzhou Li, Yongjun Deng, Guangjun Gou, Xuejun Cui, Yunsen Hu, Xiaozhi Hu
Summary: Micro-arc oxidation (MAO) treatment was used to modify aluminum (Al) alloys in order to improve bond strength with carbon fiber reinforced polymer (CFRP). The treatment successfully created a porous surface with better hardness, roughness, and wetting, and introduced resin pre-coating (RPC) and carbon nanotube (CNT) fiber bridging to improve the bonding interface. The combined treatments significantly increased the bond strength by up to 156.1%, indicating the feasibility of MAO as an alternative method for manufacturing high-performance Al-CFRP composites in industrial production.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
James Kratz, Christophe Paris, Karolina Gaska, Vincent Maes, Ivana Partridge, Philippe Olivier
Summary: Faster heating rates and higher process temperatures can reduce the total process time while achieving the same degree-of-cure. Thermal analysis shows that thermoplastic interleaf particles melt at the recommended curing temperature. A short dwell at a lower temperature can prevent the mixing of thermoplastic particles and thermoset pre-polymer.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Thomas Maierhofer, Evripides G. Loukaides, Craig Carr, Chiara Bisagni, Richard Butler
Summary: Joining thermoset composites via resistance welding provides an efficient method for aerospace structures with benefits such as high-volume manufacturing and simplified surface preparation. The influence of welding parameters on joint performance is assessed using Mode I fracture toughness testing. A Bayesian approach is employed to select high-performance parameters.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Jiangan You, Ling Cai, Ronghua Yu, Haiping Xing, Jian Xue, Ying Li, Zhiwei Jiang, Dongmei Cui, Tao Tang
Summary: In response to the global environmental pollution crisis caused by waste plastics, recyclable design is an effective solution. A CPVC/PUA nanocomposite foam was developed using the plasticizing-foaming-reinforcing strategy, combined with catalytic carbonization. The foam exhibited high expansion ratio, robustness, solvent resistance, flame-triggered shape memory effect, and ablation resistance. The foam could be directly upcycled into functional carbon foam with attractive electromagnetic interference shielding performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Siyao Chen, Zhiyu Chen, Yangling Ou, Junwei Lyu, Junning Li, Xiangyang Liu, Yang Liu
Summary: In this study, we demonstrated the significant effect of composite interface on temperature increase in electrical heaters. By selectively fluorinating the outer walls of carbon nanotubes and compositing them with cellulose nanofibers, improved interfacial phonon diffusion was achieved, leading to a higher temperature increase rate.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)
Article
Engineering, Manufacturing
Yanjun He, Agnieszka Suliga, Alex Brinkmeyer, Mark Schenk, Ian Hamerton
Summary: A new thermoset resin system based on a polybenzoxazine blend showed good performance under high ATOX irradiation. It reduced erosion yield by forming a silicon-rich surface layer and improved the mechanical properties of CFRP laminates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2024)