Article
Chemistry, Multidisciplinary
Dominik Schuchardt, Sabine Rosenfeldt, Hussein Kalo, Josef Breu
Summary: By exchanging synthetic sodium-fluorohectorite with vinylbenzyltrimethylammonium chloride, the clay can be delaminated and a liquid crystalline suspension can be obtained through 1D dissolution. Crystalline nanocomposites can then be obtained by photopolymerization of wet coatings. The incorporation of modified clay into the polymer results in a material with very low oxygen and water vapor transmission rates, making it suitable for challenging packaging applications.
Article
Engineering, Mechanical
Yu Gao, Shiyang Zhu, Huiming Ding, Xiaowen Song, Huanyi Hu, Han Wang, Yinglin Ke
Summary: As ultra-thick laminates are extensively used in aerospace and marine applications, understanding the effect of thickness on their compressive properties is crucial. This study investigates the influence of parameters such as fiber volume fraction, fiber waviness, void content, and free edge effect on the compressive strength of ultra-thick laminates. The results indicate that the fiber volume fraction remains relatively unchanged with increasing thickness, while fiber waviness, void content, and free edge stress significantly influence the compressive strength. Furthermore, the study proposes an empirical relationship between compressive strength and thickness, providing important theoretical and experimental references for the design of ultra-thick composite structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
M. Zappalorto, P. A. Carraro, M. Quaresimin
Summary: The main aim of this work is to propose and validate an analytical strategy for correlating the electric and mechanical response of bi-directional laminates in the presence of off-axis cracks and delamination. An analytical model is developed and validated to assess the electrical resistance increase and predict the laminate stiffness, establishing a direct correlation between resistance change and stiffness degradation.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Nima Shabanijafroudi, Rajamohan Ganesan
Summary: The proposed methodology offers a solution for predicting the buckling and postbuckling behavior of composite plates with delamination, with a focus on addressing fracture mechanics phenomena in the postbuckling regime. By utilizing a new laminate partitioning scheme and modeling sublaminates with the first-order shear deformation theory, displacement consistency near the crack tip is improved. The use of a penalty function method enforces the continuity of the displacement field across sublaminate interfaces, while the equilibrium equations are derived using the Ritz method and solved with an arc-length method.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Tingyang Wu, Bing Zhang, Mudan Chen, Deng'an Cai, Guangming Zhou
Summary: This study investigates the flexural properties and damage evolution of electrothermal deicing composites through experimental and numerical modeling methods. Specimens were manufactured using autoclave curing and spray metal multi-layer deposition technology. Experimental results and numerical simulations show good agreement in terms of damage distribution.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
Bo Gao, Huai Yan, Boyi Wang, Qiang Yang, Songhe Meng, Yanyan Huo
Summary: A method for simultaneous identification of in-plane elastic and interlaminar properties of composite laminates using a single experiment is proposed in this paper. The method employs Bayesian inference and sensitivity analysis to determine the critical properties at different stages, and the results demonstrate its effectiveness and accuracy. By using this method, time and cost can be saved in obtaining multiple mechanical properties of laminates.
Article
Mechanics
Sepideh Rezaei Jafari, Amin Farrokhabadi, John Montesano
Summary: This study investigated delamination cracks induced from staggered matrix cracks in cross-ply laminates, using a newly developed energy-based analytical model. The model accurately predicted laminate stiffness and strain energy release rate, with results matching well with finite element analysis data. The findings demonstrate the accuracy and robustness of the developed model.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Kundan K. Verma, C. H. Viswarupachari, Kotresh M. Gaddikeri, S. Ramesh, S. Kumar, Suryasarthi Bose
Summary: The study investigates the post impact compressive residual strength of epoxy-based composite laminates in the presence of through-thickness reinforcement (TTR) introduced using tufting technique. Results demonstrate a significant reduction in damaged area and an increase in residual strength with increasing tuft density up to 0.56%, attributed to the bridging effect of TTR enhancing the interlaminar strength.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Yu Gong, Dingli Tian, Tiancheng Cao, Libin Zhao, Jianyu Zhang, Ning Hu, Chuanzeng Zhang
Summary: In this study, a novel delamination growth criterion considering the significant R-curve effects was proposed for mixed-mode I/II delamination predictions. Its adequacy and accuracy were validated by experimental data for two different composite materials. The proposed criterion is easy to use with only two experimentally obtained parameters.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
M. Hussain, A. Imad, A. Saouab, T. Kanit, Y. Nawab, C. Herbelot, M. Kashif
Summary: This paper reports the development of new 3D Jute Reinforced natural fibre Aluminium Laminates (JuRALs) with improved mechanical properties through enhanced weaving pattern and metal-composite bonding. Tensile and flexural properties were better in through-thickness composites, while T-peel tests showed the influence of constituent materials on metal-composite adhesion rather than the type of 3D structure.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Engineering, Manufacturing
Anil R. Ravindran, Raj B. Ladani, Shuying Wu, Chun H. Wang, Adrian P. Mouritz
Summary: Platelet designs inspired by nacre shell microstructure are effective in improving the pseudo-ductility properties of brittle fibre reinforced polymer laminates. This study investigates the effects of tiling pattern, overlapping length, and interlaminar toughness on the tensile properties and failure modes of platelet laminates inspired by nacre. The findings are used to optimize the design for maximal pseudo-ductility.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Review
Polymer Science
Savita Gupta, Snehanshu Pal, Bankim Chandra Ray
Summary: Aerospace and aircraft companies use a pyramid structure of testing to evaluate aircraft structural design, from specimen tests to full-scale structure tests. Open hole strength evaluation is an important process for composite components, as holes can lead to a significant decrease in strength due to stress concentration. This review focuses on the effect of holes on the mechanical properties of CFRP laminates, presenting experimental results and an overview of the tensile, compressive, flexural, and post-buckling properties of laminates with holes. The failure mechanism during loading is also discussed and described graphically.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Instruments & Instrumentation
Wei Xu, Maosen Cao, Zhongqing Su, Hao Xu, Maciej Radzienski, Wieslaw Ostachowicz
Summary: A novel approach for imaging delamination using perturbation to steady-state wavefields is proposed in this study, allowing for high-precision characterization of delamination. Experimental results validate the capability of the approach to successfully image delamination and accurately describe the occurrence, locations, and sizes.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
F. Chen, Q. S. Mei, J. Y. Li, C. L. Li, L. Wan, G. D. Zhang, X. M. Mei, Z. H. Chen, T. Xu, Y. C. Wang
Summary: In-situ graphene/copper nanocomposites were successfully fabricated using an accumulative roll-compositing process, resulting in excellent mechanical and electrical properties. The method of ARC processing was effective in exfoliating graphite into graphene nanosheets, highlighting the potential for enhancing graphene contributions in composite materials.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Polymer Science
Ali Atta, Mohammed F. Alotiby, Nuha Al-Harbi, Mohamed R. El-Aassar, Mohamed A. M. Uosif, Mohamed Rabia
Summary: This research paper aims to fabricate flexible PVA/Cs/TiO2 nanocomposite films for energy storage devices. Various analytical techniques confirmed the successful fabrication of the PVA/Cs/TiO2 films, with homogenous distribution of TiO2 in the PVA/Cs chains. The composite films exhibited improved electrical conductivity and dielectric constant compared to pure PVA/Cs films.
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)