Article
Engineering, Manufacturing
Vishwas Divse, Deepak Marla, Suhas S. Joshi
Summary: This work develops a 3D progressive damage model to predict drilling-induced damage and its effect on the load-carrying capacity of fiber reinforced plastics laminates. The model is validated and applied to simulate drilling and its induced damage, showing good agreement with experimental data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Li Liu, Dean Hu, Detao Wan, Xingdi Hu, Xu Han
Summary: Based on low-velocity impact tests and finite element analysis, it was found that changing ply angle and increasing the number of 45 degrees/-45 degrees sub-laminates can affect the energy absorption and stiffness of composite laminates. Additionally, the interfacial strength plays a crucial role in the impact resistance of UHMWPE/LLDPE laminates.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
I. R. Cozar, F. Otero, P. Maimi, E. Gonzalez, S. Miot, A. Turon, P. P. Camanho
Summary: A new 3D elastoplastic damage model is proposed to predict the plastic deformation and progressive failure of composite materials. The model is validated through various tests and shows good agreement with experimental data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Natalia Ribeiro Marinho, Mariano Andres Arbelo, Geraldo Mauricio Candido, Rita de Cassia Mendonca Sales, Mauricio Vicente Donadon
Summary: This study investigated the Mode I delamination fatigue crack growth behavior in a carbon-epoxy prepreg fabric laminate by evaluating the mean load effects. Results showed that the fatigue crack growth rate was determined as a function of the maximum Mode I strain energy release rate, while the delamination growth rate curve was strongly affected by the applied mean load.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Mohit Gupta, Harpreet Singh, Ashraf Nawaz Khan, Puneet Mahajan, R. T. Durai Prabhakaran, R. Alagirusamy
Summary: A novel ply based non-linear material constitutive model is proposed for mechanical characterization of plain woven composite, with the ability to decouple plasticity and progressive damage effects. The study on basalt plain woven composite plays a crucial role in understanding the material properties through mechanical characterization and experiments.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Cong Zhang, Xitao Zheng, Keyu Zhu, Jing Peng, Zhibang Wang, Leilei Lan
Summary: A novel damage tolerance design method of discrete interleaved toughening for laminated composite was proposed in this paper. The method involved deploying discrete thermoplastic PA 66 films between selected adjacent layers and considering three toughening dimensions. Experimental results showed that the method effectively suppressed delamination damage and changed the path of delamination crack propagation, leading to a significant reduction in the delamination damage projected area and an improvement in the compression after impact strength.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Manufacturing
J. L. Liu, T. E. Tay, S. W. Ng, V. B. C. Tan
Summary: The interlaminar shear strength and mode II fracture toughness of carbon-epoxy laminates decrease as the inter-ply mismatch angle increases. Delamination tends to form more easily at interfaces with larger mismatch angles, leading to lower delamination resistance in multi-directional laminate plates. Applying interlaminar properties obtained from unidirectional samples may result in erroneous predictions for the simulation of multi-directional laminates.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Multidisciplinary
Gisele G. Cintra, Janine D. Vieira, Daniel C. T. Cardoso, Thomas Keller
Summary: This paper investigates the interlaminar fracture of pultruded glass fiber-polymer structural members and proposes a testing methodology. The results show that the Modified Beam Theory method performs the best for crack propagation in Mode I, while the Corrected beam theory using effective crack length and the Experimental compliance method yield differences lower than 1% from experiments in Mode II.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Mechanical
Binbin Liao, Jianwu Zhou, Shigang Ai, Yuan Lin, Li Xi, Yong Cao, Dengbao Xiao
Summary: The study investigates the impact of laminate thickness on the low velocity impact responses of Z-pinned laminates, demonstrating that Z-pins are effective in preventing delamination, especially when impact energy exceeds a certain threshold. As laminate thickness increases, the delamination suppression is less effective for thin laminates compared to intermediate-thickness laminates, while thick laminates may experience weaker suppression effectiveness due to smaller bridging forces and slight Z-pin pull-out at the same impact energy.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Jianchao Guo, Yongbo Zhang, Ke Chen
Summary: This paper proposes a novel algorithm for determining design allowables of composite laminates based on initial damages, providing more accurate design allowables for different aircraft structures. Compared to the single-point method, the design allowables calculated based on initial damages can be increased by at least 5% to 20%, significantly improving the economic benefits of aircraft structures and supporting damage tolerance design of composite structures.
Article
Chemistry, Physical
Jin Sun, Linhai Huang, Junhua Zhao
Summary: The low-velocity impact behavior of carbon-epoxy cross-ply composites was numerically investigated, examining the effect of impact angle. The results showed that an increase in impact angle intensified the action of tangential force, transferring energy absorption from normal plastic deformation to tangential deformation and friction. Delamination damage to the upper layers was more affected by tangential loads, intensifying with the increase of the impact angle, while delamination damage to lower layers was mainly determined by normal loads, weakening with the increasing impact angle overall.
Article
Construction & Building Technology
Julia Diaz-Escobar, Paulina Diaz-Montiel, Satchi Venkataraman, Arnoldo Diaz-Ramirez
Summary: Electrical resistance tomography (ERT) is a nondestructive evaluation technique used to assess structural integrity by measuring the internal conductivity variations of materials. Its use in the aerospace industry can reduce inspection and maintenance costs. However, applying ERT to map damage in CFRP composites is challenging due to the inability to distinguish between damage modes. This article explores the combined use of ERT and machine learning algorithms to classify and characterize delamination and matrix cracking damage in CFRP laminates.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Mechanics
Johannes Reiner, Reza Vaziri, Navid Zobeiry
Summary: The study proposed a data-rich framework to characterize the macroscopic strain-softening response of laminated composites under compressive loading using machine learning models. By simulating compression tests with an efficient FE model and training two ML methods, the study successfully demonstrated the effectiveness of using ML to reduce experimental efforts for damage characterization in composites subjected to compressive loads.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Zheng Kaidong, Hu Haixiao, Cao Dongfeng, Zhong Yucheng, Li Shuxin
Summary: This study investigates the tensile failure characteristics of thin-ply and thick-ply open-hole laminates through experimental and numerical simulation methods. The results show that thin-ply laminates have a better delamination suppression effect and can restrain the propagation of delamination along the loading direction, while thick-ply laminates are prone to delamination failure. Therefore, thin-ply prepregs should be considered when ensuring the structural integrity of laminated composite structures in the presence of delamination.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
P. A. Carraro, L. Maragoni, M. Quaresimin
Summary: Delamination is a major mechanism in the fatigue damage evolution of multidirectional laminates, leading to stiffness degradation; an analytical model is proposed to predict the stiffness matrix of symmetric laminates with off-axis cracks and delamination; the model estimates laminate elastic properties based on shear lag analysis and is validated against experimental data and Finite Element analyses.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
A. Lopatin, E. Morozov
Summary: This paper presents a novel solution to the free vibration problem of a shallow sandwich cylindrical panel with fully clamped edges, and derives an analytical formula for the fundamental frequency. The panel vibrations are modeled using engineering theory and solved using the Galerkin method, with approximate functions for the shape of the vibrating panel obtained from analysis of bending deformation of a clamped-clamped sandwich beam. The analytical formula is applied to calculate fundamental frequencies of sandwich panels with various structural parameters, successfully verified using the finite element method and implemented in the design analysis of sandwich panels.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
Alexander Lopatin, Evgeny Morozov
Summary: This paper presents an analytical solution for the buckling problem of a composite cylindrical sandwich panel subjected to axial load. The study considers different boundary conditions and loading scenarios, utilizing engineering theory equations and numerical methods to derive a critical load formula. The formula is verified through finite-element analysis and demonstrates the influence of Poisson's effect on the buckling load value.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Materials Science, Composites
Hongxu Wang, Paul Hazell, Krishna Shankar, Evgeny Morozov, Zlatko Jovanoski, Andrew D. Brown, Zongjun Li, Juan P. Escobedo-Diaz
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Engineering, Mechanical
Caizheng Wang, Krishna Shankar, Evgeny Morozov, Karthik Ram Ramakrishnan, Alan Fien
JOURNAL OF ENGINEERING MECHANICS
(2020)
Article
Engineering, Mechanical
B. Aryal, E. Morozov, K. Shankar
Summary: This paper investigates the effects of ballistic impact damage on the mechanical behavior of composite honeycomb sandwich panels through ballistic tests and experimental analysis, evaluating the damage modes and extent using various methods. Structural performance of intact and damaged panels is studied through in-plane compression tests and numerical analysis, assessing the reduction in load-carrying ability caused by ballistic damage and comparing it with numerical simulations.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Caizheng Wang, Karthik Ram Ramakrishnan, Krishna Shankar, Evgeny Morozov, Hongxu Wang, Alan Fien
Summary: This study developed a macro-scale approach for studying the mechanical properties of stainless steel 304 wire mesh using a shell model, with material parameters determined from experimental tests. The comparison with experimental data and simulation results showed that the macro-scale model is more suitable for large-size simulations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Mechanics
A. Lopatin, E. Morozov, A. Shatov
Summary: This paper considers the buckling of a biaxially compressed anisogrid stiffened composite cylindrical panel with clamped edges. The analysis is based on modeling and using the engineering theory to derive an analytical formula for the critical compressive buckling load. The results of calculations have been verified by finite-element analyses.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Mechanical
A. Lopatin, E. Morozov
Summary: This work proposes an efficient method to calculate the fundamental frequency of a corner-supported composite sandwich plate with a lumped mass at its center. The method combines the Hamilton principle and the Rayleigh-Ritz method to solve the dynamic problem of the panel. The results were successfully verified through comparisons with finite-element computations, demonstrating the efficiency of the proposed methodology.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Civil
Caizheng Wang, Hongxu Wang, Krishna Shankar, Evgeny V. Morozov, Paul J. Hazell
Summary: The study investigated the dynamic mechanical response of steel wire mesh subjected to low-velocity impact loading using experimental and numerical methods. Factors such as impact energy, impactor's mass and size, and strength differences between weft and warp wires were found to influence the extent of damage and mechanical performance of the wire mesh specimens under different loading conditions. Experimental results revealed that peak contact force increased with impact energy until wire breakage occurred, after which the peak force remained almost unchanged.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
A. Lopatin, E. Morozov
Summary: The study investigated the buckling behavior of an orthotropic composite plate on an elastic orthotropic foundation with nonlinear transverse displacement, proposing a new model for more accurate calculation of critical buckling load, which yielded lower values compared to the traditional model. The finite element analysis confirmed the validity of the calculations, showing that the proposed model enables more accurate determination of critical load.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Jianshen Wang, Daniel East, Evgeny Morozov, Aaron Seeber, Juan P. Escobedo-Diaz
Summary: Ti-Ni-C functionally graded composites were fabricated using a LENS(TM) additive manufacturing system, showing that the phase constitution, microstructure, and hardness of the composites gradually change with chemical composition. The addition of Ni coated graphite increases the density and changes the morphology of in-situ synthesised TiC precipitates, leading to an increase in hardness of the graded composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Multidisciplinary
Hongxu Wang, Dakshitha Weerasinghe, Paul J. Hazell, Damith Mohotti, Evgeny V. Morozov, Juan P. Escobedo-Diaz
Summary: This study investigates the impact behavior of UHMWPE textile composites under different matrix rigidities. Experimental and numerical methods were used to analyze the mechanical properties. It was found that the composites changed from membrane stretching mode to plate bending mode as the matrix rigidity and thickness increased. The flexible matrix composites had higher perforation resistance but larger deformation compared to the rigid matrix counterparts.
DEFENCE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Matthew J. Donough, B. Gangadhara Prusty, Mitchell J. Van Donselaar, Evgeny V. Morozov, Hongxu Wang, Paul J. Hazell, Andrew W. Philips, Nigel A. St John
Summary: This work investigated the damage in thick glass-fibre/epoxy laminates caused by low velocity impacts. Experimental and numerical results showed that the impact damage was localized in the vicinity of the impactor contact area and included an interplay of various damage mechanisms. The highest impact damage resistance was obtained with the 0 degrees (in-plane) specimen due to the alignment of fibers to the impact loading direction.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Jianshen Wang, Daniel East, Evgeny V. Morozov, Hongxu Wang, Paul J. Hazell, Juan P. Escobedo-Diaz
Summary: This study investigated the mechanical response, microstructures, and failure mechanisms of additively manufactured Ti matrix composites with Ti2Ni and TiCx reinforcements under various loading rates. The results showed that the mechanical properties of the composites changed with the NCG fraction. The failure mechanisms involved tensile fracture of TiCx precipitates and shear of the Ti matrix. Composites with higher NCG content exhibited increased strength, reduced ductility, and lower strain rate sensitivity. The Ti-Ni-C composite showed enhanced strength without compromising ductility under high strain rate compression loading, making it a promising material for impact load applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Nusrat Alim, Svetlana Boriskina, Ahasanul Haque, Haroldo T. Hattori, Evgeny Morozov, Andrey Miroshnichenko
2020 IEEE PHOTONICS CONFERENCE (IPC)
(2020)
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)
