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Статті в журналах з теми "Interlaminar damping materials"

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Автор: Grafiati

Опубліковано: 14 березня 2023

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Saravanos, D. A., and J. M. Pereira. "Dynamic Characteristics of Specialty Composite Structures with Embedded Damping Layers." Journal of Vibration and Acoustics 117, no. 1 (January 1, 1995): 62–69. http://dx.doi.org/10.1115/1.2873868.

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Анотація:

Damping mechanics for predicting the damped dynamic characteristics in specialty composite structures with compliant interlaminar damping layers are presented. Finite-element based mechanics incorporating a discrete layer (or layer-wise) laminate damping theory are utilized to represent general laminate configurations in terms of lay-up and fiber orientation angles, cross-sectional thickness, shape and boundary conditions. Evaluations of the method with exact solutions and experimental data illustrate its accuracy. Additional parametric studies demonstrate the unique capability of angle-ply composite laminates with cocured interlaminar damping layers to significantly enhance structural damping.

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Saravanos, D. A. "Integrated Damping Mechanics for Thick Composite Laminates and Plates." Journal of Applied Mechanics 61, no. 2 (June 1, 1994): 375–83. http://dx.doi.org/10.1115/1.2901454.

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Анотація:

A method for predicting the damped dynamic characteristics of thick composite laminates and plates is presented. Unified damping mechanics relate the damping of composite plates to constituent properties, fiber volume ratio, fiber orientation, laminate configuration, plate geometry, temperature, and moisture. Discrete layer damping mechanics for thick laminates, entailing piecewise continuous displacement fields and including the effects of interlaminar shear damping, are described. A semi-analytical method for predicting the modal damping and natural frequencies of thick simply-supported specialty composite plates is included. Applications demonstrate the validity, merit, and ranges of applicability of the new theory. The applications further illustrate the significance of interlaminar shear damping, and investigate the effects of lamination, thickness aspect ratio, fiber content, and temperature.

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Gibson, Ronald F., Yu Chen, and Hui Zhao. "Improvement of Vibration Damping Capacity and Fracture Toughness in Composite Laminates by the Use of Polymeric Interleaves." Journal of Engineering Materials and Technology 123, no. 3 (January 18, 2001): 309–14. http://dx.doi.org/10.1115/1.1370385.

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It is shown that, under certain conditions, simultaneous improvement of vibration damping capacity and interlaminar fracture toughness in composite laminates can be achieved by using polymeric interleaves between the composite laminae. The specific case of Mode II interlaminar fracture toughness and flexural damping capacity of interleaved composite laminates is studied. Graphite/epoxy, E-glass/epoxy and E-glass/polyetherimide composite laminates with polymeric interleaves of several different thicknesses and materials were tested using both the end notch flexure (ENF) test for Mode II fracture toughness and the impulse-frequency response test for flexural damping capacity. The Mode II energy release rate GIIc for all three composites increased linearly with increasing interleaf thickness up to a critical thickness, then dropped off with further increases in thickness. The damping loss factor η for all three composites increased linearly with increasing interleaf thickness up to the maximum thickness. Analytical models for predicting the influence of interleaves on GIIc and η are developed, along with a hypothesis for the critical thickness effect with regard to fracture toughness.

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Lakshmaiya, Natrayan, Seeniappan Kaliappan, Pravin P. Patil, Velmurugan Ganesan, Joshuva Arockia Dhanraj, Chattariya Sirisamphanwong, Tanakorn Wongwuttanasatian, et al. "Influence of Oil Palm Nano Filler on Interlaminar Shear and Dynamic Mechanical Properties of Flax/Epoxy-Based Hybrid Nanocomposites under Cryogenic Condition." Coatings 12, no. 11 (November 4, 2022): 1675. http://dx.doi.org/10.3390/coatings12111675.

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Natural fiber-reinforced polymer composites are gaining in popularity due to recyclability and availability. This research investigates how oil palm shell (OPS) filler materials impact the interlaminar shear and the dynamic properties of flax fiber-reinforced hybrid composites under cryogenic circumstances. Filler materials in two different proportions (0, 2, 4, and 6 wt.% OPS) and 40 wt.% flax fibers were used to make composites. The OPS filler-filled polymeric materials were invented through typical hand lay-up. The hybrid materials were imperiled to liquid nitrogen for varying amounts of time after production (15 and 30 min). According to the findings, OPS nanoparticles can be used as natural rather than artificial fillers. Furthermore, loading 4 wt.% OPS nanoparticles into organic fabric-strengthened epoxy polymeric materials during 15 min of cryogenic settings resulted in the best interlaminar shear and dynamic performances. The storage and loss modulus of the flax/epoxy composites were improved by adding a 4% OPS nanofiller. The improvement can be ascribed to the hardness and stiffness of the additional OPS nanofillers. The 4% nano-OPS/flax/epoxy hybrid nanocomposite’s damping factor was substantially reduced compared to the flax/epoxy composites. The OPS nanofiller limits the epoxy molecular chain’s free segmental mobility, resulting in a lower damping factor and enhancing the adherence among flax fibers and the epoxy resin. The shattered specimen of the hybrid materials was investigated using a scanning electron microscope.

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Lu, Wenjiang, Faxiang Qin, Yunfei Wang, Yang Luo, Huan Wang, Fabrizio Scarpa, Jixue Li, Raffaella Sesana, Francesca Cura, and Hua-Xin Peng. "Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability." ACS Applied Materials & Interfaces 11, no. 33 (July 26, 2019): 30278–89. http://dx.doi.org/10.1021/acsami.9b09393.

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Badre-Alam, A., K. W. Wang, and F. Gandhi. "An analysis of interlaminar stresses in active constrained layer damping treatments." Journal of Sound and Vibration 269, no. 3-5 (January 2004): 965–90. http://dx.doi.org/10.1016/s0022-460x(03)00208-6.

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Yim, Jong Hee, B. Z. Jang, J. C. Suhling, and J. W. Gillespie. "Effects of interlaminar stresses on damping of 0-degree unidirectional laminated composites." Polymer Composites 20, no. 6 (December 1999): 796–803. http://dx.doi.org/10.1002/pc.10403.

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Kumar, Raj, S. Mohan Kumar, M. E. Shashi Kumar, V. Ravi Kumar, Rajesh Kivade, Jonnalagadda Pavan, A. H. Seikh, M. H. Siddique, and Abdi Diriba. "Thermogravimetric Analysis and Mechanical Properties of Pebble Natural Filler-Reinforced Polymer Composites Produced through a Hand Layup Technique." Advances in Materials Science and Engineering 2022 (September 20, 2022): 1–8. http://dx.doi.org/10.1155/2022/1837741.

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Using pebble and fibre in an epoxy matrix, the mechanical, dynamic, and thermal characteristics of a composite were examined. Tensile, flexural, impact, and interlaminar shear strengths are experimentally determined. In this study, we compare the mechanical performance of carbon fibre composites composed entirely of conventional epoxy (NE). The results of a comparative investigation using 15 and 20% carbon fibre in an epoxy matrix are presented. Additional categories for compressive strength and damping ratio were defined based on this performance. The epoxy resin was combined with carbon fibre (15 wt% and 20 wt%) in a unidirectional arrangement and manufactured with different fillers like pebble. The goal of this research is to better understand the bonding mechanisms between damping materials and the resin matrix in order to increase interfacial bonding performance. This information is required for both selecting the appropriate material for applications and developing a composite construction using that material.

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Pan, Jiao, Min Li, Shaokai Wang, Yizhuo Gu, Qingwen Li, and Zuoguang Zhang. "Hybrid effect of carbon nanotube film and ultrathin carbon fiber prepreg composites." Journal of Reinforced Plastics and Composites 36, no. 6 (December 15, 2016): 452–63. http://dx.doi.org/10.1177/0731684416684020.

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This paper successfully interlaced floating catalyst chemical vapor deposition-grown carbon nanotube film and ultrathin carbon fiber prepreg to achieve strong and flexible carbon nanotube/carbon fiber hybrid composites with high carbon nanotube loading. Epoxidation was also introduced to improve interlaminar interfacial bonding. It was found that pristine carbon nanotube film/carbon fiber interply hybrid composite (carbon fiber/carbon nanotube/carbon fiber) showed sudden and brittle failure, while epoxidation caused a gradual failure behavior. Hybrid effect analysis suggested that the improved tensile performance and synergistic effect of epoxidized carbon nanotube film/carbon fiber hybrid composite were attributed to good load transfer and suppressed delamination induced by improved interfacial bonding. In addition carbon fiber/carbon nanotube/carbon fiber manifested excellent damping capacity with the maximum loss factor of 0.13. The in-plane electrical conductivity of composite with global carbon nanotube content of 21 wt% increased to the same order of magnitude as carbon nanotube film composite. The excellent mechanical, damping, and electrical properties demonstrated great potential for both structural and multifunctional applications of the resultant hybrid composites.

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Hong, Mi-Kyoung, Woong-Ki Choi, Jong-Hyun Park, Yun-Su Kuk, Byoung-Suhk Kim, and Min-Kang Seo. "Relationship Between Functionalized Multi-Walled Carbon Nanotubes and Damping Properties of Multi-Walled Carbon Nanotubes/Carbon Fiber-Reinforced Plastic Composites for Shaft." Journal of Nanoscience and Nanotechnology 20, no. 11 (November 1, 2020): 6862–70. http://dx.doi.org/10.1166/jnn.2020.18810.

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The mechanical properties and damping behavior of carbon fiber-reinforced plastic composites with functionalized multi-walled carbon nanotubes were examined. The functionalized multi-walled carbon nanotubes were blended with epoxy resins to prepare multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites. The dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins were examined using surface free energy. The mechanical properties of functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites were measured by interlaminar shear strength and torsion strength. The functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites had superior mechanical properties due to the increase in dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins. However, the tan delta values of damping behavior, analyzed by dynamic mechanical analysis, varied with the type of functional groups of functionalized multi-walled carbon nanotubes. The composites obtained from functionalized multi-walled carbon nanotubes obtained through spermidine amidation reaction and carbon fiber-reinforced plastic showed excellent tan delta values due to the flexible segments in side chains.

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Zhu, Xuerui, Yan Li, Tao Yu, and Zhongsen Zhang. "Enhancement of the interlaminar fracture toughness and damping properties of carbon fiber reinforced composites using cellulose nanofiber interleaves." Composites Communications 28 (December 2021): 100940. http://dx.doi.org/10.1016/j.coco.2021.100940.

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Plagianakos, Theofanis S., Kirsa Muñoz, Stylianos Strapatsakis, Maria del Mar Fernandez, Miguel Jimenez, and Evangelos Karachalios. "Effects of hot-wet storage aging, CNT-integration and damping layer interposition on static and fatigue interlaminar shear response of a UD Graphite/Epoxy material system." Materials Today Communications 25 (December 2020): 101296. http://dx.doi.org/10.1016/j.mtcomm.2020.101296.

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David-West, Opukuro. "The Effect of Hybridisation on Carbon and Glass Fibres Reinforced Composites Under Quasi-Static Loading." Journal of Mechanical Engineering 19, no. 3 (September 15, 2022): 1–17. http://dx.doi.org/10.24191/jmeche.v19i3.19793.

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Анотація:

Fibre hybridisation in composite structures is a promising strategy to control the stiffness and energy absorption characteristics. The hybrid structure could offer a better balance of appropriate mechanical properties tailored to specific application. Carbon fibre is extremely strong compared to glass fibre, and to overcome the challenges of replacing conventional materials in respect of the appropriate mechanical properties, hybridisation seems to be a good approach. In this study interlaminar hybrid composites were produced with carbon and glass fibres as reinforcement and non-hybrid samples of carbon fibre reinforcement. All the composite plates were tested under quasi-static loading and the results obtained were plotted as load – displacement graphs for loading and un-loading; the slope of the loading curve taken as estimate for the bending stiffness. The results of the laminate bending stiffnesses were 312 kN/m, 407 kN/m, 224 kN/m and 223 kN/m for the configurations [90C/0C/±45C]S, [90C/0C]2S, [90C/0G/±45CG]S and [90C/0G]2S, respectively; which showed reduction with the introduction of glass fibres. Hence, the process of hybridisation could be used to modify a couple of the characteristics of composite structures including the natural frequencies and damping properties. Micro-photograph of the damaged section revealed matrix crack and ply debonding.

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Muralidhara, B., SP Kumaresh Babu, and B. Suresha. "Studies on mechanical, thermal and tribological properties of carbon fibre-reinforced boron nitride-filled epoxy composites." High Performance Polymers 32, no. 9 (June 19, 2020): 1061–81. http://dx.doi.org/10.1177/0954008320929396.

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This research focuses on the static mechanical, thermal and tribological properties of carbon fibre epoxy (CF/Ep) composites filled with boron nitride (BN) micro-filler powder (BN-CF/Ep). The mechanical properties studied were tensile, flexural, interlaminar shear strength and hardness. The thermal properties studied were dynamic mechanical and thermogravimetric analyses which were analysed through dynamic mechanical analyser and thermogravimetric analyser, respectively. The curing ability and dispersion of BN filler in the Ep and composites were investigated through differential scanning calorimetry, Fourier-transform infrared spectra and scanning electron microscopy. The tribological properties focused were three-body abrasion and dry sliding friction and wear conduct. Three-body abrasion tests were studied with silica sand of 212 µm particle size, 30 N load, 2.38 m s−1 sliding velocity and variable abrasive distances of 250 m, 500 m, 750 m and 1000 m. The dry sliding wear tests were performed using pin-on-disc (POD) wear experimental set-up with 60 N load, 3 m s−1 sliding velocity and variable sliding distances of 1000 m, 2000 m and 3000 m. The results followed the trend of BN1% > BN3% > BN5% composites in all mechanical properties. The carbon fabric reinforcement along with the BN-Ep matrix improved enormously all the mechanical properties except impact resistance. Further, it was exhibited that 1 wt% BN into CF/Ep prompts better mechanical properties with predominant damping capacity and thermal stability. Both the dry sand abrasive wear and POD test outcomes revealed that all BN-CF/Ep composites prompt predominant wear resistance. CF along with BN improves enormously the wear resistance with friction coefficient. Further, it was exhibited that 1 wt% BN into CF/Ep in both three-body abrasive and POD tests prompts better wear resistance. Generally speaking, it was presumed that BN-CF/Ep gracefully and successfully improved the mechanical, thermal and tribological properties and morphology of Ep for various mechanical, electrical components and load-bearing applications used in automotive and engineered applications.

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Ouyang, Qin, Xiaohong Wang, Yongtao Yao, and Ling Liu. "Improved damping and mechanical properties of carbon fibrous laminates with tailored carbon nanotube/polyurethane hybrid membranes." Polymers and Polymer Composites, October 14, 2020, 096739112096299. http://dx.doi.org/10.1177/0967391120962998.

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This paper design two kinds of damping interleaves, traditional thermoplastic polyurethane (TPU) and novel carbon nanotube (CNT) modified TPU porous membranes are designed and respectively interleaved into the interfaces of a carbon fiber-reinforced plastic (CFRP). How the interleaves affect the damping behaviors and quasi-static mechanical properties of the CFRP is comparatively investigated. Results show that both TPU and CNT/TPU interleaved CFRPs possess good damping behaviors within a wide temperature range of 50∼150°C as well as a wide frequency band from 0.1 to 30 Hz, where, the former is a little better. But, storage modulus of the CNT/TPU interleaved CFRP is always higher than that of the TPU interleaved CFRP at different temperatures and frequencies. Moreover, the flexural strength and interlaminar shear strength are both decreased by 36.0% and 24.0% for the TPU interleaved CFRP, and 20.0% and 17.8% for the CNT/TPU interleaved CFRP, respectively, when compared to the baseline CFRP, suggesting the CNT/TPU interleaf brings less negative effect on the mechanical properties of CFRP. Comparatively, CNT/TPU interleaved CFRP is more multifunctional, possessing good damping feature and reasonable mechanical properties, which is maybe more potential in the structural-functional field, especially where needs shock absorption and noise reduction.

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