Article
Engineering, Civil
Tao Wu, Yijia Sun, Xi Liu, Yantao Cao
Summary: The experimental investigation compared the flexural behavior of lightweight aggregate concrete beams reinforced and prestressed with CFRP bars, showing that prestressing force and steel fibers can reduce deflection and crack width, while longer clear span length results in wider cracks. A geometry-based model and iterative algorithm were proposed for calculating the deflection and stress increment of beams prestressed with unbonded FRP tendons.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Shoutan Song, Guan Wang, Xinzhe Min, Ning Duan, Yongming Tu
Summary: The novel section design aims to enhance the seismic performance and durability of concrete frame structures. By reasonably allocating steel and CFRP reinforcement, the concrete frame with ideal mechanical properties can be achieved.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Polymer Science
Sharizal Ahmad Sobri, Robert Heinemann, David Whitehead
Summary: This article discusses the feasibility of sequential laser-mechanical drilling for thick CFRP composites. The method was found to reduce overall thrust and torque by an average of 61%, increasing productivity and extending the lifespan of cutting tools. The laser-mechanical sequence drilling technique showed the highest delamination factor ratios for both drill bits and laser pre-drilling techniques.
Article
Construction & Building Technology
Zehui Xiang, Jie Zhou, Jiangang Niu
Summary: This study investigates the effects of steel fiber content, CFRP layers, and core concrete compressive strength grade on the mechanical properties of self-compacting lightweight aggregate concrete (SLC) square columns. It is found that the synergistic effect of steel fiber and CFRP can significantly improve the failure mode and mechanical properties of the material. Adding a small number of steel fibers can greatly improve the mechanical properties of the specimens when the number of CFRP layers is small.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Composites
M. Erfan Kazemi, Victor Medeau, Lorenzo Mencattelli, Emile Greenhalgh, Paul Robinson, James Finlayson, Silvestre T. Pinho
Summary: We introduce novel zone-based hybrid laminate concepts to enhance the high-velocity impact (HVI) response of baseline carbon fibre-reinforced polymer (CFRP) composites. By keeping approximately 80% of the baseline CFRP mass in the hybrid concepts, similar areal weights and substantial in-plane mechanical properties are maintained. Three zones are identified along the laminate thickness, and tailored materials are incorporated to improve the HVI response. Various materials, including carbon (thin- and thick-plies), glass, Zylon, ultra-high molecular weight polyethylene (UHMWPE), shape memory alloy/carbon fabric, and ceramic, alumina, and titanium sheets, are studied. All laminate concepts have comparable areal weights for meaningful comparison. Experimental results demonstrate up to 95% improvement in energy dissipation compared to the baseline quasi-isotropic (QI) CFRP configuration.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Aerospace
Ming Li, Hengyi Zhu, Changliang Lai, Wenyi Bao, Han Han, Renbang Lin, Weiping He, Hualin Fan
Summary: This article introduces the application of carbon fiber reinforced composite lattice cylindrical shells in lightweight structural designs. The configurations of three typical lattice structures are demonstrated, and their performance under compression and vibration is discussed. Non-destructive methods and failure theories are also presented to predict the mechanical properties and failure loads of the shells.
PROGRESS IN AEROSPACE SCIENCES
(2022)
Article
Engineering, Multidisciplinary
M. Erfan Kazemi, Victor Medeau, Emile Greenhalgh, Paul Robinson, James Finlayson, Silvestre T. Pinho
Summary: This study proposes a novel design methodology using bio-inspired and interleaved layups to develop hybrid carbon fibre-reinforced polymer composite structures for improved high-velocity impact performance. The results show that the new design significantly improves energy dissipation and activates additional failure mechanisms compared to traditional layups.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Emmanuel J. Ekoi, Andrew N. Dickson, Denis P. Dowling
Summary: This paper evaluates the mechanical properties of woven continuous carbon fibre composites printed by additive manufacturing (AM) and compares them with nonwoven composites. The woven composites showed significantly higher strength and superior fatigue performance compared to the nonwoven composites, indicating their potential for high cyclic load applications.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Mechanics
Lili Hu, Peng Feng
Summary: The use of PS CFRP technology effectively enhances the buckling resistance of steel columns. Axial and eccentric compression tests were conducted under different conditions, analyzing the buckling capacity and failure modes, and further establishing a model of the buckling mechanism.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Yishuo Huang, Ming -Gin Lee, Yu-Cheng Kan, Wei -Chien Wang, Yung-Chih Wang, Wei -Bang Pan
Summary: This study explores the retrofitting of reinforced concrete beams with ultra-high-performance concrete (UHPC) or carbon fiber-reinforced polymer (CFRP). The results show that UHPC increases the ultimate load of the beams by 35% and their displacement by 26.8 mm, making it a better choice in terms of toughness and economic benefits.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Cheav Por Chea, Yu Bai, Yihai Fang, Yiming Zhang
Summary: Reciprocal frame structures using GFRP members were developed in this study, with a mathematical model for geometric forming and capacity design. An innovative connection configuration was developed to facilitate assembly and minimize tool requirements. Experimental results supported the conceptual design and modeling analysis, verifying proposed evaluation methods and mechanical performance of the structure.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Yijia Sun, Tao Wu, Xi Liu
Summary: The test results showed that using steel fiber-reinforced lightweight aggregate concrete (SFLWC) and increasing the reinforcement ratio enhanced the serviceability performance of the beams. At service load, all the CFRP-reinforced beams exhibited conservative deflections and satisfied the crack width limit. Moreover, an energy-based method was adopted to quantify the influence of the fibers on the beam stiffness, leading to a rational deflection model for SFLWC beams reinforced with CFRP bars.
ADVANCES IN STRUCTURAL ENGINEERING
(2022)
Article
Mechanics
Yuan Chen, Lin Ye, Hang Dong
Summary: In this study, a novel lightweight 3D composite lattice structure with zero coefficient of thermal expansion (CTE) was developed and investigated. A base planar composite lattice was first manufactured using continuous carbon fiber reinforced polyamide (CCF/PA) and short carbon fiber reinforced polyamide (SCF/PA) strips. A numerical model was validated and used to calculate a 3D composite lattice structure with a negative effective CTE of -0.18 x 10-6/degrees C. Parametric analysis and optimization were performed to improve the density and CTE of the lattice structure. The results showed significant improvements in both parameters, demonstrating the effectiveness of the design in achieving high thermal-dimensional stability.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Daeik Jang, B. H. Choi, H. N. Yoon, Beomjoo Yang, H. K. Lee
Summary: In this study, carbonyl iron powder (CIP)-embedded carbon fiber-reinforced polymer (CFRP) composites were fabricated as lightweight electromagnetic interference (EMI) shielding composites. The effects of different CIP contents on the electrical characteristics and EMI shielding capability of the composites were investigated, and microstructural images and observations were analyzed. The results showed that increasing the CIP content improved the EMI shielding capability, and the use of the composites in structures demonstrated potential for EMI shielding.
COMPOSITE STRUCTURES
(2022)
Article
Polymer Science
Petr P. Polskoy, Dmitry Mailyan, Alexey N. Beskopylny, Besarion Meskhi, Aleksandr V. Shilov, Artur Umarov
Summary: Many studies focus on using polymer composite materials to increase the strength and stability of concrete elements. This study aimed to increase the strength and stiffness of compressed reinforced concrete elements reinforced with composite materials, and compared the bearing capacity of ten different combinations of reinforcement. The results showed that using composite materials can increase the bearing capacity by up to 41% and the stiffness by up to 30%. Recommendations were proposed for improving the calculation method for inflexible columns reinforced in the transverse direction, taking into consideration the three-dimensional stress state of concrete.
