Article
Mechanics
Ashwin R. Kristnama, Xiaodong Xu, Michael R. Wisnom, Stephen R. Hallett
Summary: This paper presents prediction of high velocity, oblique impact response and quasi-static residual tensile strength of thin carbon/epoxy laminates using FE models. The predicted impact damage was validated against test results, showing increasing damage with impact energy and the influence of projectile orientation. Residual tensile strength of impacted laminates was investigated, with good agreement for edge-impacted laminates but unconservative results for centre-impacted laminates. Machined notches were also studied, showing close agreement between predicted and experimental results for edge-impacted laminates.
COMPOSITE STRUCTURES
(2021)
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
Materials Science, Composites
Timothy Russell, David A. Jack
Summary: This study presents a methodology to predict the strength of single beads of short-fiber reinforced material in large-scale 3D printing, using the strength theory and averaging technique. The visual advantages of the methodology and its sensitivity to various parameters are demonstrated.
POLYMER COMPOSITES
(2021)
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, Composites
Yiding Li, Shibo Yan, Ying Yan, Weijie Zhang
Summary: This study proposed a high-fidelity virtual braiding model that considers the fiber-level deformation of yarns to generate realistic mesostructure of tubular composites. The method accurately models the braiding process, including the deposition zone and convergence zone. The simulated braided preforms agree well with experimental results and can facilitate the performance analysis of braided composite structures.
POLYMER COMPOSITES
(2023)
Article
Engineering, Manufacturing
Qi Zhang, Zhangjie Yu, Zhengzheng Dai, Guangming Zhou, Deng'an Cai
Summary: This study analyzed the failure process of two different types of composite frame joints and found that the strength of joints reinforced with high-lock bolts and adhesive showed a significant improvement.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Multidisciplinary
T. R. C. Chuaqui, M. W. D. Nielsen, J. Colton, R. Butler, A. T. Rhead
Summary: The strength of carbon-fibre reinforced plastic laminates under open-hole tension can be significantly affected by ply angle, ply blocking, and loading direction. Experimental and finite element analysis testing shows that matrix damage can both benefit and decrease strength, with a proposed numerical edge treatment resulting in up to 80% strength increases by suppressing edge failure in certain applications. These findings challenge the validity of standard open-hole tension testing and design rules.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Masahiro Arai, Toshiki Chiba, Keita Goto, Akinori Yoshimura
Summary: This study evaluated the interlaminar tensile strength of CFRP prepregs under different curing conditions and investigated the effects of adding a carbon nanofiller interlayer on fracture toughness. The results showed that dynamic interlaminar strength was higher than static strength, and samples cured at 130 degrees C had higher strength compared to those cured at 100 degrees C.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Martijn Wismans, Sten J. J. van den Broek, Lambert C. A. van Breemen, Leon E. Govaert, Tom A. P. Engels
Summary: This study demonstrates that the strength of a short-fiber reinforced polymer measured in uniaxial tension is not indicative of its strength under multiaxial loading conditions. Physical aging is found to decrease strength in multiaxial loading but increase strength in uniaxial loading. A micromechanical analysis using 3D representative volume elements and a constitutive model is performed to explain these observations. The results highlight the importance of considering complex loading conditions when predicting strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Manufacturing
Jian Wang, Sen Liang, Jie Xiong, Biyun Peng, Lijun He, Yunchuan Xie, Zhicheng Zhang
Summary: This study successfully enhances the energy storage properties of polymer nanocomposites through surface modification and structure modulation. By utilizing self-assembly phase-transitioned lysozyme (PTL) modification and layered gradient structure design, interface defects can be weakened and charge injection can be reduced simultaneously, resulting in a higher energy density.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Composites
Ernesto Camarena, Ryan J. Clarke, Brandon L. Ennis
Summary: The study aims to increase the value of carbon fiber in wind turbine blades using a finite element model to evaluate and improve cost-specific compressive strength. Parametric studies identify key uncertainties in model inputs affecting compressive strength predictions, and a statistical approach is proposed to account for fiber misalignment in composite materials. Sensitivity studies show that fiber packing and interface shear strength have the greatest impact on compressive strength predictions for the fiber reinforced polymer studied.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
T. R. C. Chuaqui, A. T. Rhead, R. Butler, C. Scarth
Summary: A novel Bayesian optimisation framework is proposed for designing stronger stacking sequences in composite laminates, incorporating high-fidelity progressive damage finite element modelling and data-driven optimisation methodology. The framework efficiently establishes aerospace design guidelines by considering typical design constraints and ensuring good feasible solutions are found.
COMPOSITES PART B-ENGINEERING
(2021)
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
Materials Science, Multidisciplinary
Yajun Chen, Jinchuan Yang, Fusheng Wang, Jianshu Peng
Summary: The short beam shear performance of GLARE 3A-3/2 laminates with adhesive layers was investigated, showing significant differences in strength and bending displacement between different directions. The damage behavior was mainly influenced by the bottom GFRP layer of the laminates, and the distribution of surface strain could indicate the evolution process of damage. The finite element simulation results were consistent with the digital image correlation analysis, providing an effective method for predicting damage behavior in specimens with different ply structures.
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2022)
Article
Materials Science, Coatings & Films
Dou Hu, Qiangang Fu, Bing Liu, Lei Zhou, Jia Sun
Summary: The gradient multi-layered design did not show significant positive effect on the protective performance improvement of SAPS MoSi2 coating. However, the laminated multi-layered design remarkably improved oxidation resistance and thermal shock resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
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)