Article
Engineering, Manufacturing
F. Yu, S. Chen, L. T. Harper, N. A. Warrior
Summary: The study investigated the effect of inter-ply sliding on multi-ply NCF preforms during the DDF process, and found that wrinkles were most severe when the inter-ply angle was 45 degrees, with wrinkle length being related to the relative fibre angle. Experiments confirmed that out-of-plane wrinkles are sensitive to the friction resistance between NCF plies, and lubricating the fibres can minimize wrinkling defects caused by dissimilar inter-ply deformation.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Characterization & Testing
Jung-Ting Tsai, Joshua S. Dustin, Jan-Anders Mansson
Summary: The study compared the strain measurement capabilities of a Distributed Fiber Optical Sensor (DOS) with traditional Strain Gages (SG) and Digital Image Correlation (DIC) on a multi-directional continuous fiber composite laminate coupon. Results showed that the DOS accurately measured strains in concentrated areas and in the presence of a strain gradient, with good agreement between measured and theoretical results. The findings suggest that DOS is a robust strain acquisition option that overcomes some limitations associated with traditional foil SG and DIC methods.
Article
Engineering, Multidisciplinary
F. Yu, S. Chen, G. D. Lawrence, N. A. Warrior, L. T. Harper
Summary: This study investigates the forming behavior of preforms made from Non-Crimp Fabric (NCF) for manufacturing complex double-curved geometries using Double Diaphragm Forming (DDF). Finite element (FE) simulations are used to study the effect of ply layup sequence on the formation of fabric wrinkles. The simulation results are in good agreement with experimental results, showing the location and number of fabric wrinkles for single or multi-ply layups. The simulations reveal that fabric over-shearing induced by convex double-curved features and dissimilar inter-ply shear deformations lead to fabric wrinkles.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Construction & Building Technology
Marta Gil Perez, Bas Rongen, Valentin Koslowski, Jan Knippers
Summary: The BUGA Fibre Pavilion, built in Germany in 2019, utilizes modular fibre-polymer composite components for its construction. An experimental design approach and structural testing were employed for the design and validation of these components.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Polymer Science
Muhammad Ameerul Atrash Mohsin, Lorenzo Iannucci, Emile S. Greenhalgh
Summary: This study evaluated the low-velocity impact responses of two types of non-crimp fabric carbon fiber reinforced thermoplastic laminated composites and used different NDE techniques for damage assessment, while also developing a finite element model for validation. The observed damage extent and calculated impact energy absorption levels were compared and discussed between experimental and FE analysis results.
Article
Materials Science, Composites
Sina AhmadvashAghbash, Christian Breite, Mahoor Mehdikhani, Yentl Swolfs
Summary: Longitudinal fibre-matrix debonding is influenced by various factors such as interfacial strength, fracture toughness, thermal residual stresses, friction, and matrix plasticity. The proposed finite element model accounts for these factors and allows for debond propagation based on assigned interfacial properties. Parametric studies demonstrate that higher values for interfacial friction coefficient, thermal residual stress, and interfacial fracture toughness restrict debond propagation, while matrix plasticity facilitates it.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Civil
Y. Jeawon, G. A. Drosopoulos, G. Foutsitzi, G. E. Stavroulakis, S. Adali
Summary: The optimal design and analysis of three-phase graphene/fibre reinforced laminated nanocomposite plates with the aim of maximizing the fundamental frequency is studied in this research. Different sets of design parameters are optimized to assess and compare the effectiveness in maximizing the fundamental frequency. Non-uniform distributions of graphene and fibre as well as fibre orientations are observed to be effective in improving the design efficiency.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Composites
Sina AhmadvashAghbash, Babak Fazlali, Mahoor Mehdikhani, Yentl Swolfs
Summary: This study proposes a novel approach using finite element modeling to comprehensively simulate the stress redistribution around a broken fiber in unidirectional composites. The parametric study reveals that factors such as friction coefficient and interfacial fracture toughness significantly affect the stress concentration factor of intact fibers. Introducing interfacial debonding reduces the overpredictions of stress concentration factor.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Nicholas R. Pilato, Richard Butler, James Trevarthen, Alexander J. G. Lunt
Summary: This study presents a novel modelling method for carbon fibre composite laminates with wrinkles, using wrinkle geometries measured from non-destructive testing and sample cross-sections. The resulting finite element models allow for rapid assessment of the influence of various physical wrinkle parameters on the mechanical properties of laminates, with validation against analytical models and experimental data.
MATERIALS & DESIGN
(2022)
Article
Mechanics
X. Lu, X. M. Guo
Summary: In this study, a non-local continuum damage model is developed to analyze the progressive failure of laminated composites. The model incorporates an orthotropic non-local integral strategy with two internal length scales, allowing for accurate predictions of damage evolution. Additionally, an interactive damage transfer scheme is proposed to capture the interaction between matrix cracking and interface delamination. The model demonstrates superior performance over conventional methods in predicting the complex failure mechanisms of composite laminates.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Manufacturing
A. Cocchi, O. Montagnier, C. Hochard
Summary: Flat hourglass specimens were used to assess the compressive behaviour of FRP using two testing techniques. The hourglass shape ensured failure at the center of the specimen and minimized stress concentration. Bending tests and DIC measurements were performed, with a proposed procedure for calculating bending moment validated in the presence of large displacements. Two different materials were tested and compared, and compression tests were also carried out to compare hourglass specimens to standardized dog-bone samples. The two testing techniques were analyzed and compared for their effectiveness.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Multidisciplinary
T. Nagoshi, Y. Harada, S. Nakasumi, N. Yamazaki, K. Hasegawa, K. Takagi, W. Peng, G. Fujii, M. Ohkubo
Summary: Cohesive failure in the epoxy adhesive layers of carbon-fiber-reinforced plastic (CFRP) joints is a perplexing issue. This study reveals that micrometer-scale defects may contribute to the occurrence of cohesive failure and proposes a new phenomenological model to explain this behavior. These findings are of significant importance for enhancing the reliability of CFRP components.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Manufacturing
Xie Li, Sonya A. Brown, Mathew W. Joosten, Garth M. Pearce
Summary: This study conducted short beam shear tests to validate the capability of tow-wise modelling (TWM) in predicting the failure mechanisms of AP-Ply laminates, achieving excellent correlation between numerical and experimental results.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
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
F. Yu, S. Chen, L. T. Harper, N. A. Warrior
Summary: A global-to-local modelling strategy is proposed to predict macroscale defects in biaxial non-crimp fabric during double diaphragm forming. The two-stage approach combines coarse and fine mesh simulations to accurately predict forming-induced defects, showing a CPU time reduction of approximately 13% compared to high fidelity full-scale models. The methodology is validated through fabric forming experiments, demonstrating good agreement between predicted and observed defect locations and characteristics.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Materials Science, Composites
Yusuke Nishio, Akira Todoroki, Yoshihiro Mizutani, Yoshiro Suzuki
ADVANCED COMPOSITE MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
Masahiro Suzuki, Yoshiro Suzuki, Akira Todoroki, Yoshihiro Mizutani
IEEE SENSORS JOURNAL
(2018)
Article
Chemistry, Multidisciplinary
Vannei Sry, Yoshihiro Mizutani, Gen Endo, Yoshiro Suzuki, Akira Todoroki
APPLIED SCIENCES-BASEL
(2018)
Article
Materials Science, Composites
Kouki Ishii, Akira Todoroki, Yoshihiro Mizutani, Yoshiro Suzuki, Yoichiro Koga, Ryosuke Matsuzaki, Masahito Ueda, Yoshiyasu Hirano
ADVANCED COMPOSITE MATERIALS
(2019)
Article
Materials Science, Composites
Akira Todoroki, Tastuki Oasada, Yoshihiro Mizutani, Yoshiro Suzuki, Masahito Ueda, Ryosuke Matsuzaki, Yoshiyasu Hirano
ADVANCED COMPOSITE MATERIALS
(2020)
Article
Mechanics
Takeshi Ashizawa, Yoshihiro Mizutani, Nobuyuki Toyama, Akira Todoroki, Yoshiro Suzuki
COMPOSITE STRUCTURES
(2020)
Article
Materials Science, Textiles
V Sry, D. Y. Jung, Y. Mizutani, G. Endo, A. Todoroki
Summary: This study investigates the effect of preload treatment on the elastic modulus of braided high modulus polyethylene (HMPE) rope for static loading in tendon-driven robot. It is found that preloading in tensile loading can be an alternative method to replace the commonly used preload treatment in cyclic loading. After preload treatment, the elastic modulus of the preloaded rope and strand at the first cycle is the smallest, attributed to the elastic recovery of the material itself.
JOURNAL OF THE TEXTILE INSTITUTE
(2021)
Article
Materials Science, Composites
Takeshi Ashizawa, Yoshihiro Mizutani, Nobuyuki Toyama, Akira Todoroki, Daniel Lopez Rodrigo
Summary: This study examined the three-dimensional propagation of bulk waves in CFRPs with concentrically curved fibers, expanding the similarity law to account for the 3D propagation behaviors. The experimental visualization demonstrated that the shape changes of quasi-longitudinal waves follow the similarity law, eventually verifying it for 3D propagation. Mathematical discussion based on the governing equations showed the need for equal expansion parameters in both thickness and radial directions to satisfy the similarity law in the 3D case.
ADVANCED COMPOSITE MATERIALS
(2021)
Article
Materials Science, Textiles
Doyun Jung, Yoshihiro Mizutani, Akira Todoroki, Wonjin Na
Summary: Exposure to up to 300 hours of ultraviolet irradiation led to a decrease in tensile strength and higher attenuation of acoustic emission signals in glass fiber-reinforced composite specimens. While the b-value initially tended to increase with exposure to UV light, it decreased after 300 hours, highlighting the impact of attenuation on the structural health parameter calculation.
FIBERS AND POLYMERS
(2021)
Article
Materials Science, Textiles
Vannei Sry, Yoshihiro Mizutani, Gen Endo, Akira Todoroki
Summary: This article discusses the stabilization of longitudinal elastic modulus of braided high modulus polyethylene rope for dynamic loading in tendon-driven robot through preload treatment. Utilizing experimental data and a spring-dashpot model, the strain of the rope under impact loading can be estimated with consistent results.
JOURNAL OF THE TEXTILE INSTITUTE
(2022)
Article
Materials Science, Composites
Wataru Matsunaga, Koichi Mizukami, Yoshihiro Mizutani, Akira Todoroki
Summary: A novel eddy current testing method was developed for testing UD-CFRP and controlling the detection range. By adding electrodes orthogonal to the fibers, the eddy current density could be significantly increased, and the depth distribution of the eddy current density could be controlled by adjusting the distance of the electrodes. However, for quasi-isotropic CFRP, the distance of the electrodes could not control the depth distribution of the eddy current density. The impedance of the UD-CFRP with electrodes increased as the distance between electrodes increased, which was consistent with the numerical simulation results.
ADVANCED COMPOSITE MATERIALS
(2022)
Article
Materials Science, Composites
Xiaojuan Xu, Wataru Matsunaga, Koichi Mizukami, Yoshihiro Mizutani, Akira Todoroki
Summary: This study proposes a smart eddy current testing method for identifying crack orientation by introducing an additional electrically anisotropic plate. The experimental results show that the magnetic field distribution changes when the anisotropic plate is inserted, and the output voltage of the probe is affected by the angle between the conductivity angle of the anisotropic plate and the crack orientation.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Wataru Matsunaga, Yoshihiro Mizutani
Summary: This study investigates the arrangement and shape of coils for permittivity measurement using electromagnetic induction testing (EIT) in a dielectric sandwiched between carbon fiber reinforced plastics (CFRPs). Finite element analysis (FEA) confirms that EIT can be used for permittivity measurement. Suitable coil arrangement and shape are determined through FEA analysis. The experimental results demonstrate the effectiveness of the proposed method for permittivity measurement.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Engineering, Chemical
Rio Hirakawa, Tetsuo Yasuoka, Yoshihiro Mizutani
Summary: The effect of a rectangular convex/concave shape on preventing crack growth in adhesively bonded joints was investigated analytically. The study used the finite element method to simulate a double cantilever beam test and evaluate crack growth resistance. The results showed that both concave and convex shapes improved fracture toughness and acted as crack arresters.
JOURNAL OF ADHESION
(2023)
Article
Materials Science, Composites
Wataru Matsunaga, Koichi Mizukami, Yoshihiro Mizutani, Akira Todoroki
Summary: In this study, a novel method using electromagnetic induction testing was presented to estimate the moisture absorption rate of glass fiber reinforced plastics. The relationship between permittivity and moisture absorption rate was analytically calculated, and the validity of the method was verified through experiments.
COMPOSITES PART C: OPEN ACCESS
(2022)
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)