Article
Materials Science, Composites
Shijun Song, Chao Xiong, Junhui Yin, Xiaoyong Kang
Summary: This study proposes an effective method for manufacturing a composite interlocked triangular honeycomb and examines its mechanical properties. Experimental tests reveal that the honeycomb has higher specific strength and specific stiffness compared to other types of honeycomb structures. The study also evaluates the mechanical properties of the honeycomb sandwich structure and identifies debonding failure and edge effect as the main weaknesses.
POLYMER COMPOSITES
(2023)
Article
Engineering, Marine
Yu Zhang, Yinggang Li, Kailing Guo, Ling Zhu
Summary: Sandwich structures, particularly aluminium honeycomb sandwich panels (AHSPs), are widely used in marine lightweight design and impact protection due to their excellent mechanical properties. This paper investigates the dynamic mechanical behavior and energy absorption characteristics of AHSPs under repeated impact loadings through numerical modeling and experimental validation, revealing the deformation modes and performance of sandwich structures.
Article
Mechanics
Miguel Marco, Ricardo Belda, Maria Henar Miguelez, Eugenio Giner
Summary: This study analyzed the mechanical properties of various lattice and porous structures using the finite element method, showing that different cavity distributions have a significant impact on the mechanical behavior of the structures.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Valerio Acanfora, Mauro Zarrelli, Aniello Riccio
Summary: This paper presents a numerical/experimental study on a new effective shock absorber concept achieved through Additive Manufacturing technology. The study compares different shock absorber configurations and demonstrates that sandwich structures made with polypropylene and carbon fiber reinforced polymers exhibit better overall crashworthiness performance. The numerical results are prelimary validated through experimental tests.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Mechanics
John Susainathan, Enrique Barbero, Sonia Sanchez-Saez, Arthur Cantarel, Florent Eyma
Summary: An explicit numerical model is developed to study the impact behavior of a new composite eco-structure. The model accurately predicts the stiffness degradation and damage of wooden plies by simulating the elastic response and incorporating a stress-based modified Hashin-3D damage model. Validation with experimental results shows a good agreement and higher accuracy.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Haiying Cao, Wenyi Bao, Cuiping Bai, Qu Yan, Ben Wang, Yunze Yang, Hualin Fan
Summary: This research utilizes the free curling property of the OH with zero Poisson's ratio to design and manufacture curved CFRC sandwich beams. The failure mechanism of these beams is revealed through three-point bending experiments, showing that the shearing fracture of the OH core controls the initial failure of the curved structure. The ultimate bearing capacity and flexural rigidity of the curved beams increase with the curvature, and no debonding is observed in the experiments.
POLYMER COMPOSITES
(2023)
Article
Mechanics
D. K. Korupolu, P. R. Budarapu, V. R. Vusa, M. K. Pandit, J. N. Reddy
Summary: This study investigates the performance of enhanced hierarchical honeycomb core cellular structures under compression and impact loads by proposing a hierarchical scheme of varying the order and level of the cells. The development of hierarchical patterns enhances the load-bearing capacity and introduces a novel second order second level hexagon based hybrid cell.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Quan-Wei Li, Bo-Hua Sun
Summary: The diagonal-enhanced square grid configuration inspired by glass sponge has great potential in mechanics, with geometries serving as honeycomb cores for sandwich panels, which can improve the structure's energy absorption capabilities. A finite element numerical model is proposed to accurately model the low-speed impact response of bio-inspired diagonal-enhanced square honeycomb core (BSHC) sandwich panels. BSHC sandwich panels have significantly enhanced peak loads and stiffness compared to hexagonal honeycomb core (HHC) sandwich panels and ordinary square honeycomb core (OSHC) sandwich panels, and outperform HHC sandwich panels in terms of resistance to impact deformation.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Leo de Waal, Guoxing Lu, Jianjun Zhang, Zhong You
Summary: Efforts to improve cellular structures in impact scenarios through the introduction of gradients in mechanical properties have shown promise. Origami techniques offer a convenient way to transform 2D sheets into 3D structures, with the ability to vary the crease pattern for graded topology. Experimental testing validated that origami honeycomb cores can exhibit similar advantages to traditional grading methods under dynamic loading, showing potential as an attractive alternative.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Construction & Building Technology
Feiyue Yan, Wenge Qiu, Yuchao Zheng, Shuhua Jiang, Hui Hu, Gang-gang Gao, Yunjian Cheng
Summary: By optimizing the design plan and installing a buffer layer, this study successfully addressed the challenges of reconstructing a railway station adjacent to existing twin tunnels, reducing clearances and construction costs. Validation of the design scheme through model tests and numerical modeling showed promising results for potential application in similar projects to minimize disturbance to existing tunnels.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Wenguang Ye, Yunyong Cheng, Hao Dou, Dinghua Zhang, Fuqiang Yang, Zhixiang Li, Wenfeng Cai
Summary: Continuous-carbon-fibre-reinforced (CCFR) honeycomb structures with self-sensing abilities were fabricated using 3D printing. The structures showed good performance in both low-velocity impact and compression after impact tests, indicating their potential for diverse applications.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shijun Song, Chao Xiong, Junhui Yin, Sa Zhang
Summary: A composite interlocked diamond honeycomb structure fabricated by interlocking technology shows better mechanical properties than interlocked Kagome and square honeycombs. However, the edge effect limits the edge compressive strength and stiffness, and debonding is the main failure mode that limits both bending and compressive strength of the sandwich structure.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Chris Fischer, Falk Haehnel, Klaus Wolf, Johannes Markmiller
Summary: Honeycomb cores made of phenol resin impregnated paper are commonly used in aircraft sandwich structures. The impact behavior of preloaded honeycomb sandwich structures is not well investigated. Experimental study shows that even low preloads lead to larger structural damage areas and lower residual strength.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
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
Engineering, Civil
Chang Qi, Lian-Zheng Pei, Alex Remennikov, Shu Yang, Feng Jiang
Summary: This paper theoretically studies the crushing response of metallic 3D re-entrant honeycomb structures and analyzes their crushing strength. The results reveal that the oblique wall length and cell wall thickness have a significant effect on the crushing strength, while other parameters have a minor effect. Additionally, a new type of 3D re-entrant honeycomb unit structure is discovered and its crushing strength is derived and validated.
THIN-WALLED STRUCTURES
(2023)
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)