Article
Materials Science, Composites
Raja Ganesh, Ahmad Abu Obaid, John W. Gillespie
Summary: A novel continuous fiber bending test method is developed to measure the size and spatial distribution of defects in S-glass fibers. The results show that there are serious errors in predicting fiber strength when extrapolating the Weibull strength distribution to lengths less than 200 & mu;m.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Civil
Jiong-Yi Zhu, Junbo Chen, Tak-Ming Chan
Summary: This paper reviews the lateral behavior of circular concrete filled steel tube (CFST) and existing lateral-axial strain models, and proposes a modified strain model for high strength concrete CFST to capture the interaction behavior of the steel tube and concrete accurately. This analytical model can predict the load bearing capacity, load-shortening curve, and axial strain-lateral strain relationship of CFST with both normal and high strength concrete effectively.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Fahed Alrshoudi, Husain Abbas, Aref Abadel, Abdulrahman Albidah, Ali Altheeb, Yousef Al-Salloum
Summary: This study experimentally and analytically investigated the compression behavior of confined high strength geopolymer concrete (HSGC) and compared it with high strength cement concrete (HSC). Different types of confinement were applied and analyzed for their effects on stress-strain behavior of both HSGC and HSC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Green & Sustainable Science & Technology
Wisal Ahmed, C. W. Lim
Summary: FRAC, a sustainable and economically feasible structural concrete, is gaining popularity due to its high strength, eco-friendly, and cost-effectiveness benefits. This article comprehensively reviews the use of fibers such as steel fiber, polypropylene fiber, basalt fiber, and glass fiber in enhancing the strength of FRAC, highlighting their effects on flowability, compressive strength, flexural strength, and other durability aspects. Effective utilization of these fibers can help in maximizing the use of recycled concrete aggregate in structural concrete and implementing the concept of circular economy in the construction sector.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Jawad Ahmad, Osama Zaid, Fahid Aslam, Muhammad Shahzaib, Rahat Ullah, Hisham Alabduljabbar, Khaled Mohamed Khedher
Summary: The study showed that adding glass and nylon fibers to peach shell lightweight concrete can decrease density and increase compressive, split tensile, and flexural strength. The use of 6% glass fibers resulted in the highest strength. Mechanical tests indicated that fibers can enhance post-failure toughness and modulus of elasticity of peach shell concrete.
Article
Engineering, Civil
Zhenwen Xu, Shikun Chen, Hao Qian, Tielong Wang, Yi Liu, Dongming Yan
Summary: To ensure the stability and safety of concrete structures, it is crucial to analyze the effects of internal transverse reinforcements and externally bonded fiber-reinforced polymer (FRP) confinement on the bond performances of deformed bars in concrete. However, there are currently no prediction models available for bond strength and bond-slip response with double confinement. This study proposes a predictive model that evaluates the bond strength of deformed bars in concrete under double confinement, providing a more accurate analysis and outperforming other models based on experimental data.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Joel J. Shelton, Venkata Y. Naresh, Arun A. Solomon, C. Daniel
Summary: The application of geosynthetics, particularly geogrids, in infrastructure as an innovative development in concrete with additional shear reinforcement provided by glass fibers for Reinforced Concrete (RC) beams was studied. Experimental observations and non-linear finite element simulations showed that the use of geogrid and glass fiber reinforcement enhanced post-yield behavior and strength in the RC beams, with geogrid size playing a vital role in improving load-deformation behavior and crack propagation. The results from finite element analysis were consistent with experimental findings, indicating that geogrids could serve as an alternative with ductile behavior for strengthening RC beams.
Article
Engineering, Civil
Khalid Saqer Alotaibi, A. B. M. Saiful Islam, Khaled Galal
Summary: The study investigates the effect of Fiber Reinforced Polymers (FRP) jacketing on the compressive behavior of concrete masonry columns. Carbon and glass FRP wrapping can enhance the axial capacity and ductility of columns. Increasing the thickness of FRP jackets further improves the strain, strength, and ductility of the columns.
ENGINEERING STRUCTURES
(2022)
Article
Green & Sustainable Science & Technology
Syed Nasir Abbas, Muhammad Irshad Qureshi, Malik Muneeb Abid, Asad Zia, Muhammad Atiq Ur Rehman Tariq
Summary: This study investigates the use of fly ash and glass fibers as a partial replacement of cement in concrete to study their effects on compressive strength and split tensile strength. The findings reveal that concrete with geopolymer and glass fibers has lower strength compared to conventional concrete. However, both geopolymer and glass fiber reinforced concrete are more cost-effective than traditional concrete.
Article
Engineering, Mechanical
Santanu Choudhury, Chandra Sekher Yerramalli, Anirban Guha
Summary: An analytical model considering strain rate and temperature effects of the matrix material was developed for glass fabric reinforced polymer (GFRP) composite in armor applications. The model predicted that the ballistic limit velocity of GFRP composites increases with decreasing temperature, and a significant amount of kinetic energy is dissipated in the form of strain energy and shear plug formation. The thickness of shear plug at the ballistic limit increases at lower temperatures, indicating a shift in failure mechanism towards shear. The inclusion of rate dependency effects of the matrix did not significantly change the ballistic limit predictions at lower temperatures.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Mujahid Ali, Sheraz Abbas, Afonso Rangel Garcez de Azevedo, Markssuel Teixeira Marvila, Muhammad Imran Khan, Waqas Rafiq
Summary: This article investigates the mechanical and durability properties of confined low-strength concrete using quantitative and analytical approaches. It analyzes the behavior of low strength concrete under axial compression and explores the impact of transverse reinforcement on the concrete's strength and ductility. The experimental results show that the spacing between the transverse steel significantly affects the concrete stresses and that an increase in volumetric transverse reinforcement improves the mechanical properties and relative ductility. The study also compares different analytical models and finds that Mander's model performs best prior to peak strength, while Kent and Park's models are more accurate for post-peak behavior.
Article
Computer Science, Interdisciplinary Applications
Onur Ozturk
Summary: Carbon fiber reinforced polymer (CFRP) is commonly used to strengthen reinforced concrete structures due to its high strength and elastic modulus, low weight, and excellent durability. In this study, two different artificial neural networks (ANNs) were created to predict both strengths and strain values of CFRP confined concrete cylinder. The estimated values were found to be close to the experimental results, and sensitivity analysis of the mathematical models was performed to evaluate the proposed models, which showed closest results to the experimental data compared to other analytical models.
COMPUTERS AND CONCRETE
(2021)
Article
Chemistry, Multidisciplinary
Gabriela Rutkowska, Mariusz Zoltowski, Filip Chylinski, Yuliia Trach, Elzbieta Gortych
Summary: The limits on carbon dioxide emissions imposed by the European Union have encouraged experimental work on new-generation materials with reduced clinker content. This study evaluated the impact of glass flour and polypropylene fiber modifiers on the properties and microstructure of concrete. The results demonstrated that adding glass flour to concrete can improve its compressive strength and resistance to negative temperatures.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Muhammad Khubaib Ilyas Khan, Chi King Lee, Yixia Zhang
Summary: In this paper, an analytical model is developed to predict the compressive load-deformation behavior and the ultimate capacity of ECC-CES composite columns. The model considers the effects of ECC and steel confinement on the concrete core, as well as the softening behavior of steel columns due to compression buckling. In comparison with experimental and numerical results, the proposed analytical models using effective material stresses show better predictions than common design codes.
STRUCTURAL CONCRETE
(2022)
Article
Chemistry, Physical
Mujahid Ali, Sheraz Abbas, Bashir Salah, Javed Akhter, Waqas Saleem, Sani Haruna, Shah Room, Isyaka Abdulkadir
Summary: Reinforced concrete is widely used in the construction industry globally. This study experimentally investigated concrete confinement behavior under axial compression for both high- and standard-strength concrete, as well as low-strength concrete, using volumetric transverse reinforcement. The findings showed that the use of transverse reinforcement significantly impacted the strength and ductility of both types of concrete, with low-strength concrete being more affected than normal-strength concrete.
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)