Article
Mechanics
Rijin He, Xiaoying Sun, Yue Wu, Guowen Tang, Valter Carvelli
Summary: This study experimentally investigated the crack tearing properties of PVC coated fabrics, revealing that the initial crack length has an impact on tearing residual strength, while the variation of crack orientation has a negligible effect.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Composites
John Holmes, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: A technique using digital image correlation (DIC) is proposed to examine the local out-of-plane topography of woven composites, improving defect and damage detection during deformation. Experimental results show additional insight into weave response and defect progression, including edge delamination, local fiber waviness, and undulating weave architecture.
COMPOSITES COMMUNICATIONS
(2022)
Article
Engineering, Mechanical
Chanyoung Jeong, Yewon Hwang, Naksoo Kim, Cheolsoo Lee, Hyungyil Lee
Summary: A novel approach is proposed to evaluate equi-biaxial residual stresses from residual imprint displacement fields, where a unique region free from frictional effect is identified based on finite element analysis. Regression functions are suggested to relate imprint data with RS for a broad range of material properties. Experimental comparison shows that the determined RS values are accurate and reliable, with (maximum, mean) errors of only (10, 5) %.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Characterization & Testing
Yasuhisa Kodaira, Tatsuma Miura, Yoshinori Takano, Akio Yonezu
Summary: Porous polymer membranes undergo anisotropic elastoplastic deformation and it is important to investigate their deformation behavior under multiaxial loading. A novel biaxial tensile testing machine was developed to evaluate the deformation behavior and understand the mechanisms from their microstructure. Stress-strain curves for each loading axis were obtained to create a yield surface and investigate the deformation behavior under biaxial tensile loading.
Article
Materials Science, Composites
Tao Zheng, Jinzhao Huang, Licheng Guo, Ruijian Sun, Tianlin Huang, Jindi Zhou, Fenghao Jia, Changqing Hong
Summary: This paper investigates the failure behaviors of 3D woven composites (3DWC) under biaxial tensile loadings through combined experimental and numerical approaches. The study first designs an appropriate biaxial cruciform specimen and conducts biaxial tensile experiments. The full-field strain distributions and crack morphologies of the specimens are then analyzed, and a multiscale damage model is proposed to simulate the biaxial failure behaviors of 3DWC, considering the micromechanics of failure theory.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Review
Mechanics
John Holmes, Silvano Sommacal, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: Digital image and volume correlation (DIC and DVC) are used to measure the deformation and damage behavior of composite materials. The heterogeneous nature of the composite microstructure results in complex local behavior that cannot be captured using traditional techniques. DIC and DVC offer significant advantages in monitoring this behavior for fiber-reinforced composite materials. The careful consideration of testing setup and approach is crucial for achieving accurate results.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
John Holmes, Silvano Sommacal, Zbigniew Stachurski, Raj Das, Paul Compston
Summary: The study combined DIC with mu CT and DVC to assess the deformation and damage of woven composites, showing that differences in loading direction and fiber waviness cause significant differences in surface topography, strain, and internal out-of-plane deformation. The techniques were effective for characterizing woven composite deformation and have potential for improving finite element simulations in the future.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Jin-Kui Meng, Li Liu, Jian-Tang Jiang, Guo Huang, Liang Zhen
Summary: The fracture behaviors and mechanisms of metallic materials under biaxial stress were investigated. It was found that under quasi-uniaxial tension, normal fracture occurred, while under equi-biaxial tension, both normal and secondary shear fractures were observed. The lower strain hardening ability in the rolling direction introduced large shear stress in the 45 degrees direction, contributing significantly to the secondary shear fracture. An anisotropy parameter K was proposed for the first time to predict the fracture path.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Mechanics
Mohamed Ali Kouka, Fethi Abbassi, Murat Demiral, Furqan Ahmad, Mohamed Soula, Fadhil Al Housni
Summary: This study examined the failure behavior of loaded perforated carbon/PPS plates with stress concentrations due to different configurations of interacting holes. Experimental and numerical results showed that the stress concentration factor of perforated specimens depends on the relative position of interacting holes and the orientation of composite laminates, with different orientations affecting the maximum and minimum values of this factor.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Mohammad Ghaedsharaf, Jean-Evrard Brunel, Louis Laberge Lebel
Summary: This paper proposes a modeling methodology to predict the 3D and internal geometry of biaxial braids. By adopting truss elements to model virtual fibers with actual material properties, the study validates the mesoscopic morphology prediction of braid patterns through quantitative comparison with X-ray micro-computed tomography scans. The research shows that frictional behavior at the fiber level plays a crucial role in explaining the jammed state of braids, while changes in the coefficient of friction have limited impact on braid morphology.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Lode Daelemans, Brecht Tomme, Baris Caglar, Veronique Michaud, Jeroen Van Stappen, Veerle Cnudde, Matthieu Boone, Wim Van Paepegem
Summary: The through-thickness compressive behavior of fabric reinforcements is important in liquid composite molding manufacturing processes, and predictive simulations are necessary. A solution using hybrid virtual fibers, combining finite elements for in-plane fiber properties and out-of-plane fiber bending, enables accurate predictive compressive simulations.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Mechanics
Ruijian Sun, Tao Zheng, Yudi Yao, Danyuan Li, Huiliu Si, Licheng Guo
Summary: A comprehensive experimental method combining microscope observation, multiscale digital image correlation (DIC), and in situ computed tomography (CT) is proposed in this study to investigate the complex damage evolution of 3D woven composites under short beam shear (SBS) loading. The surface damage process and the final damage mode of the specimen are observed using a microscope, and the causes of fiber kinking are explained. Multi-scale DIC is utilized to obtain global and local strain distributions on the specimen surface, providing explanations for the occurrences of weft yarn transverse cracks and interface debonding. Additionally, in situ CT experiment is carried out to identify the reasons for the nonlinear segments of the load-displacement curve and the decline of load bearing capacity of the specimen in the late stage of the experiment. The information obtained from different observation methods is complementary, aiding in the understanding of the complex damage mechanism of 3D woven composites.
COMPOSITE STRUCTURES
(2023)
Article
Metallurgy & Metallurgical Engineering
W. Siefert, B. Alexandrov, M. Buehner
Summary: This study validated the use of digital image correlation (DIC) methodology in cross weld tensile testing (CWTT) to quantify local mechanical properties in dissimilar welds. It also demonstrated that DIC-instrumented CWTT can be used to evaluate hydrogen-assisted cracking susceptibility.
Article
Mechanics
Yingying Song, Zhaoliang Qu, Haitao Liao, Shigang Ai
Summary: This paper proposes a method using ResL-U-Net convolutional neural network to segment and reconstruct low-contrast digital images, and investigates the damage and failure behaviors of GFRP material using digital material twins. Simultaneously, the initial manufacturing defects are implanted into the finite element model to ensure the authenticity of defects and high-quality mesh.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Manufacturing
F. Yu, S. Chen, L. T. Harper, N. A. Warrior
Summary: In the study of forming-induced wrinkling behavior in bi-axial fabrics, it was found that using a non-linear bending model produces more accurate wrinkle patterns compared to experimental data. This is because the bending stiffness parameter is varied as a function of the applied forming load to account for fiber buckling. Areas of high in-plane shear are more likely to induce out-of-plane wrinkles.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Davood Rahiminejad, Paul Compston
Summary: This research investigates the impact of pre-heat temperature on stretch forming of a fibre metal laminate (FML) containing alternating layers of steel and glass-fibre polypropylene. Experimental results show that a pre-heat temperature of 140 degrees C enables FML to have formability comparable to steel sheet. Numerical simulations using finite element software LSDYNA, along with material characterization tests, provide a model for forming complex shapes with hybrid materials.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2021)
Article
Mechanics
Jiaqi Dong, Chao Hu, John Holmes, Qing-Hua Qin, Yi Xiao
Summary: This study combines the optimization ability of an ANN-aided GA with the modeling capability of FEA to accurately replicate the complex anisotropy of CFRP material fabricated by FDM 3D printing. By utilizing a local periodic cell and a curvilinear system, the mechanical homogenization of CFRP materials and the locally varying orientation of the 3D printed structure were successfully captured. Furthermore, an ANN surrogate model was trained and utilized for a GA optimization to improve the performance of cross-chiral structures printed with CFRP filaments.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
John Holmes, Silvano Sommacal, Zbigniew Stachurski, Raj Das, Paul Compston
Summary: The study combined DIC with mu CT and DVC to assess the deformation and damage of woven composites, showing that differences in loading direction and fiber waviness cause significant differences in surface topography, strain, and internal out-of-plane deformation. The techniques were effective for characterizing woven composite deformation and have potential for improving finite element simulations in the future.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
John Holmes, Silvano Sommacal, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: This study investigates the deformation response of multi-ply woven composites at different angles by combining digital image correlation (DIC) and 3D micro-computed tomography (mu CT). Significant mechanical property variances and topographical/strain differences were observed between orientations due to layer alignment. Additionally, inter-tow and intra-tow shearing during off-axis extension and corresponding fiber reorientation were identified, highlighting the benefits of combining DIC and mu CT.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
John Holmes, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: A technique using digital image correlation (DIC) is proposed to examine the local out-of-plane topography of woven composites, improving defect and damage detection during deformation. Experimental results show additional insight into weave response and defect progression, including edge delamination, local fiber waviness, and undulating weave architecture.
COMPOSITES COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Di He, Hyung Chul Kim, Robert De Kleine, Vi Kie Soo, Alper Kiziltas, Paul Compston, Matthew Doolan
Summary: This study compares the environmental impact of recycling waste polymer powders on selective laser sintering (SLS) products and injection-molded components based on real-world data. The evaluation methods for environmental burden have a significant influence on the results. Recycling polymer waste can reduce the global warming potential and primary energy demand of the products, highlighting the importance of promoting a circular economy for improving environmental performance.
JOURNAL OF INDUSTRIAL ECOLOGY
(2022)
Article
Optics
V Zinnecker, S. Madden, C. Stokes-Griffin, P. Compston, A. Rode, L. Rapp
Summary: This study investigates large area laser ablation of steel in air at ambient pressure and compares the effects of different pulse durations. It is found that long pulses of 70 ns induce surface damage to the steel, while ultrashort pulses preserve the integrity of the steel structure.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Mechanics
S. Fazeli, C. Stokes-Griffin, J. Gilbert, P. Compston
Summary: This paper investigates the bend-twist coupling analysis of multi-layered stepped generally orthotropic composite beams subjected to mixed end-of-beam and mid-span supports. An analytical closed-form model was developed, and an experimental investigation was conducted to validate the results. The reliability and accuracy of the analytical model were demonstrated.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Manufacturing
Mengyuan Li, Chris Stokes-Griffin, Silvano Sommacal, Paul Compston
Summary: This paper presents a model for predicting the change in local fiber angle during post-forming of CF/PA6 thermoplastic tubular structures. The model is validated through experimental measurements and enables the optimization of laminate design for post-formed tubes.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Mechanics
John Holmes, Silvano Sommacal, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: Digital image and volume correlation (DIC and DVC) are used to measure the deformation and damage behavior of composite materials. The heterogeneous nature of the composite microstructure results in complex local behavior that cannot be captured using traditional techniques. DIC and DVC offer significant advantages in monitoring this behavior for fiber-reinforced composite materials. The careful consideration of testing setup and approach is crucial for achieving accurate results.
COMPOSITE STRUCTURES
(2023)
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)