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Experimental investigation of carbon and glass hybrid composite under ballistic impact for marine applications
Published in C. Guedes Soares, T.A. Santos, Trends in Maritime Technology and Engineering Volume 1, 2022
V.V. Kumar, S. Rajendran, S. Ramakrishna, S. Surendran
Fiber Reinforced Plastics (FRP) has widespread use in marine applications due to their high specific strength and modulus, increased design flexibility, desirable thermal expansion characteristics, and good resistance to fatigue and corrosion (Kumar et al., 2019a 2019, Kumar et al., 2019b 2019). GFRP and CFRP are generally used for specific marine constructions, like small boats and superstructures. Though CFRP has superior mechanical strength, lightweight, and corrosion resistance, widespread use is limited due to their higher cost and brittle nature. GFRP on the other hand, are comparatively cheaper and robust but they have higher degradation nature in seawater and lesser mechanical properties. Hybridization is an efficient method to overcome these weaknesses and complement each other by creating an equilibrium of their mechanical properties. Hybrid composite is defined as blending two or more fibers that rejuvenate the chemical bonding based on similarities (Makishima, 2004, Yamada et al., 1989). Though hybridization results in superior properties, to design and develop materials for marine structures and vessels, their behavior should be clearly defined when endangered with material impact. The results from impact experiments provide insight into the energy absorption characteristics which determine the service life of marine structures and vessels.
Fatigue behavior of bearing type bolted joint with pultruded CFRP composites
Published in Hiroshi Yokota, Dan M. Frangopol, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations, 2021
M. Shimizu, K. Tateishi, T. Hanji, Y. Kitane
Carbon fiber reinforced polymer (CFRP) composites is commonly manufactured by hand lay-up molding method, in which way fiber sheets and matrix resin are laminated on a mold. While complicated shape can realize by hand lay-up molding, the productivity is inefficient for large-scale members used in civil engineering structures. On the other hands, glass fiber reinforced polymer (GFRP) composites produced by pultrusion method, in which way the fiber sheets are continuously provided and formed in manufacturing line. The pultrusion method of CFRP composites has been developed in recent years. Thus, the production method for stable supply of large-scale CFRP members is being developed.
Study of the role of CFRP shear on increased bending capacity of reinforced concrete beams
Published in Aria Hendrawan, Rifi Wijayanti Dual Arifin, Engineering, Information and Agricultural Technology in the Global Digital Revolution, 2020
Hari Suprapto, Sri Tudjono, Rr. MI. Retno Susilorini
Strength degradation in buildings can be caused by factors such as detriment, fatigue, age, and deficiencies in construction or planning. Building strength can also change when there is a transfer of functions to the building. Carbon fiber-reinforced polymer (CFRP), which is generally in the form of sheets, can be affixed to parts of structural elements that require repair (Sobuz et al., 2012). The CFRP materials can be used to increase structural strength and can also be applied to damaged structures. The use of CFRP has been regulated in ACI-440 (ACI 440 2R-08, 2008), both as flexible and as shear reinforcement. This research examined the effect of CFRP restraints on increasing flexural strength in reinforced concrete beams (Park & Paulay, 1974).
Parameters impact analysis of CFRP defect detection system based on line laser scanning thermography
Published in Nondestructive Testing and Evaluation, 2023
Luxiang Wang, Zhijie Zhang, Wuliang Yin, Haoze Chen, Guangyu Zhou, Huidong Ma, Dan Tan
According to the principle analysis in Section 2, it is known that the temperature field distribution at a point on the specimen is related to the laser energy and scanning speed. Since the non-uniform distribution of the temperature field is a key feature to determine the presence of defects [22], it can be assumed that there is a correlation between the defect detection effect and the laser power as well as the scanning speed. In addition, CFRP uses carbon fibres as reinforcement material, and in order to increase the structural strength, different layers of carbon fibres are usually laid at a certain angle respectively. The thermal conductivity of carbon fibres in radial and axial directions are known to be significantly different, so the angular relationship between the scanning direction and carbon fibre laying direction when heating also have an impact on the detection effect. For improving the detection performance of the LST system, setting the appropriate parameters may be a cost effective and convenient way. A simulation model is established in Comsol to investigate the effect law of parameters such as laser scanning direction, scanning speed as well as laser power on the detection effect.
Analytical bending stiffness model of composite shaft with breathing fatigue crack
Published in Mechanics of Advanced Materials and Structures, 2023
Mo Yang, Hao Xuan, Wei Xiong, Dezheng Liu, Yuebin Zhou, Wen Zhang
The advanced composite materials, such as carbon fiber reinforced plastic (CFRP) and functionally graded materials (FGMs), have advantages of high mechanical performance, high designable, multi-functional, etc. [1, 2]. The CFRP is being widely used in aircraft, automotive, shipbuilding, and various mechanical equipment [3]. CFRP shaft is a new type of high-performance transmission component that is prone to damage and crack during the manufacturing process or in case of collision due to the non-uniformity, anisotropy, and impact sensitivity of the CFRP materials. The crack is one of the major faults of rotating components, which must be found as soon as possible to avoid catastrophic machine failure caused by crack propagation [4]. The crack will lead to the dynamic behavior change of the shaft. It is helpful to judge the state of the crack by detecting the dynamic characteristics of the rotating shaft, which is of great significance to the long-term safe operation of the rotor system [5].
Numerical analysis on axial crushing damage of aluminum/CFRP hybrid thin-walled tubes
Published in Mechanics of Advanced Materials and Structures, 2023
Chao Zhang, Yunyun Sun, Jose L. Curiel-Sosa, Diantang Zhang
Carbon fiber reinforced plastics (CFRP) have the merits of high strength, high modulus, low density, and good designability. They have been widely used in the design of automotive crashworthiness making a great contribution to the improvement of driving safety, crash mitigation, and vehicle lightweight [1–4]. However, CFRP has the disadvantages such as high brittleness, unstable failure, and high cost. Bonding and curing low-cost plastic metallic materials to CFRP is an economical technique which allows the hybrid structural material to deform in a stable and controlled approach. Such new metal/CFRP hybrid material has good energy absorption characteristics and it is believed to be widely used as lightweight energy-absorbing tube structures in vehicles. Therefore, it is vital to deeply explore the damage modes and energy absorption mechanisms of metal/CFRP hybrid tubes for their broad practical application in the automotive industry.