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Journal articles on the topic 'Viscoelastic coating'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kuo, Chi-Wei, and C. Steve Suh. "On the Dispersion and Attenuation of Guided Waves in Tubular Section with Multi-Layered Viscoelastic Coating — Part I: Axial Wave Propagation." International Journal of Applied Mechanics 09, no. 01 (2017): 1750001. http://dx.doi.org/10.1142/s1758825117500016.

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Guided modes admissible in elastic hollow pipes are derived to establish their dispersion and attenuation characteristics in the presence of multi-layered viscoelastic coatings. Longitudinal waves propagating in the axial direction in response to displacement continuity boundary conditions signifying perfect interfacial bonds are evaluated against a baseline uncoated tubing. Viscoelastic bitumen and epoxy are coating materials applied to improve pipeline reliability. The impact of viscoelastic coating layers on wave dispersion and attenuation are investigated by incorporating complex material

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2

Benschop, H. O. G., A. J. Greidanus, R. Delfos, J. Westerweel, and W. P. Breugem. "Deformation of a linear viscoelastic compliant coating in a turbulent flow." Journal of Fluid Mechanics 859 (November 21, 2018): 613–58. http://dx.doi.org/10.1017/jfm.2018.813.

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We investigate the deformation of a linear viscoelastic compliant coating in a turbulent flow for a wide range of coating parameters. A one-way coupling model is proposed in which the turbulent surface stresses are expressed as a sum of streamwise-travelling waves with amplitudes determined from the stress spectra of the corresponding flow over a rigid wall. The analytically calculated coating deformation is analysed in terms of the root-mean-square (r.m.s.) surface displacement and the corresponding point frequency spectra. The present study systematically investigates the influence of five c

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3

USHIAMA, Seiji. "Viscoelastic Properties of Coating Films." Journal of the Japan Society of Colour Material 62, no. 2 (1989): 100–107. http://dx.doi.org/10.4011/shikizai1937.62.100.

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4

Luo, Zhuhui, Tao Li, Yuanwei Yan, and Zhou Zhou. "Analysis of Sound Absorption Performance of Underwater Acoustic Coating considering Different Poisson’s Ratio Values." Shock and Vibration 2021 (September 23, 2021): 1–11. http://dx.doi.org/10.1155/2021/4861877.

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Viscoelastic material acoustic coating plays an important role in noise and vibration control of underwater equipment. The dynamic mechanical properties of the viscoelastic material have a direct effect on the sound absorption performance of the acoustic coating. The influence of Poisson’s ratio on sound absorption performance is studied. A finite element model was established to calculate the sound absorption performance of three typical acoustic coatings: homogeneous acoustic coatings, Alberich acoustic coatings, and trumpet cavity acoustic coatings, and the influence of Poisson’s ratio on t

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5

Domenech, Luis, Jordi Renau, Asta Šakalytė, and Fernando Sánchez. "Top Coating Anti-Erosion Performance Analysis in Wind Turbine Blades Depending on Relative Acoustic Impedance. Part 1: Modelling Approach." Coatings 10, no. 7 (2020): 685. http://dx.doi.org/10.3390/coatings10070685.

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Top coating are usually moulded, painted or sprayed onto the wind blade Leading-Edge surface to prevent rain erosion due to transverse repeated droplet impacts. Wear fatigue failure analysis based on Springer model has been widely referenced and validated to quantitatively predict damage initiation. The model requires liquid, coating and substrate speed of sound measurements as constant input parameters to define analytically the shockwave progression due to their relative vibro-acoustic properties. The modelling assumes a pure elastic material behavior during the impact event. Recent coating

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6

Romero, O. J., L. E. Scriven, and M. S. Carvalho. "Slot coating of mildly viscoelastic liquids." Journal of Non-Newtonian Fluid Mechanics 138, no. 2-3 (2006): 63–75. http://dx.doi.org/10.1016/j.jnnfm.2005.11.010.

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7

Mutlu, I., P. Townsend, and M. F. Webster. "Computation of viscoelastic cable coating flows." International Journal for Numerical Methods in Fluids 26, no. 6 (1998): 697–712. http://dx.doi.org/10.1002/(sici)1097-0363(19980330)26:6<697::aid-fld680>3.0.co;2-z.

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8

Kubo, Takao, Shiro Ota, Masatoshi Oda, Kenichi Hashishita, and Yasuhiro Kakinuma. "Evaluation of Polished Surface for Viscoelastic Polymer." Advanced Materials Research 126-128 (August 2010): 493–98. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.493.

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Viscoelastic polymers are used as one of coating materials for protecting the products from scratches. Presently, the repair of the coating surface for removing dust or extraneous matters has been performed through several polishing processes. However, it becomes increasingly difficult to polish its surface by only applying good skill and experience of skilled worker because a leading-edge viscoelastic polymer for coating is further scratch-resistant. Thus, based on quantitative evaluation of relation between polishing process and finished surface, it is necessary to make the polishing process

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9

Boulhafa, Elmahdi, Kouddane Redouane, Hamza Ouadfel, Rachid Cheikh, and M. Abbadi. "Simplified Micro-Mechanical Approach for Coated Viscoelastic Inclusion." Key Engineering Materials 820 (September 2019): 118–27. http://dx.doi.org/10.4028/www.scientific.net/kem.820.118.

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The present work deals with the analytical resolution of the problem of viscoelastic coated inclusion embedded in a viscoelastic matrix.In a first step, we will study the problem of a linear viscoelastic inclusion, without coating, embedded in a linear viscoelastic matrix.Then, the problem of coated viscoelastic inclusion considering the coating as a thin layer whose viscoelastic properties are different from those of the inclusion and the matrix is performed.The resolution of this problem will be based simultaneously on the Green function technique as well as the interface operator. The analy

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10

Fadat, Gerard, and Mikael Rigdahl. "Viscoelastic properties of CMC/latex coating colors." Nordic Pulp & Paper Research Journal 2, no. 1 (1987): 30–37. http://dx.doi.org/10.3183/npprj-1987-02-01-p030-037.

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11

Yziquel, Florence, Michel Moan, Pierre J. Carreau, and Philippe A. Tanguy. "Nonlinear viscoelastic behavior of paper coating colors." Nordic Pulp & Paper Research Journal 14, no. 1 (1999): 37–47. http://dx.doi.org/10.3183/npprj-1999-14-01-p037-047.

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12

Matallah, H., P. Townsend, and M. F. Webster. "Viscoelastic multi-mode simulations of wire-coating." Journal of Non-Newtonian Fluid Mechanics 90, no. 2-3 (2000): 217–41. http://dx.doi.org/10.1016/s0377-0257(99)00079-8.

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13

Zevallos, G. A., M. S. Carvalho, and M. Pasquali. "Forward roll coating flows of viscoelastic liquids." Journal of Non-Newtonian Fluid Mechanics 130, no. 2-3 (2005): 96–109. http://dx.doi.org/10.1016/j.jnnfm.2005.08.005.

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14

Matallah, H., P. Townsend, and M. F. Webster. "Viscoelastic computations of polymeric wire‐coating flows." International Journal of Numerical Methods for Heat & Fluid Flow 12, no. 4 (2002): 404–33. http://dx.doi.org/10.1108/09615530210433279.

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15

Gozali, Ebrahim, Lars Järnström, Konstantinos Papadikis, and Alamin Idris. "Numerical Modeling of a Short-Dwell Coater for Bio-Based Coating Applications." Coatings 11, no. 1 (2020): 13. http://dx.doi.org/10.3390/coatings11010013.

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Computational fluid dynamics (CFD) simulations were used for the evaluation of critical issues associated with coating processes with the aim of developing and optimizing this important industrial technology. Four different models, namely, the constant viscosity, shear thinning, Oldroyd-B viscoelastic, and Giesekus models, were analyzed and compared in a short-dwell coater (SDC) using a bio-based coating material. The simulation results showed that the primary vortex formations predicted by the viscoelastic models were highly dependent on the flow Deborah number, resulting in uneven stress dis

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16

Lee, Sang Soon. "Determination of Singular Residual Stresses in Epoxy Layer Deposited on Concrete Substrate." Key Engineering Materials 297-300 (November 2005): 1277–84. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1277.

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This paper deals with the hygrothermal stress singularity induced at the interface corner between the epoxy coating layer and the concrete substrate as the coating layer absorbs hot moisture from the ambient environment. The epoxy layer is assumed to be a linear viscoelastic material and to be theromorheologically simple. It is further assumed that moisture effects are analogous to thermal effects. The viscoelastic boundary element method is employed to investigate the behavior of interface stresses. The order of the singularity is obtained numerically for a given viscoelastic model. The numer

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17

Tian, Chunlai, and Pengfei Duan. "Finite Element Analysis of the Nanomechanics of Hard Coatings on a Soft Polymer Substrate by a Spherical Indenter." Advances in Polymer Technology 2020 (April 24, 2020): 1–11. http://dx.doi.org/10.1155/2020/6903196.

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Composite has been widely used in various fields due to its advanced performance. To reveal the relation between the mechanical properties of the composite and that of each individual component, finite element analysis (FEA) has usually been adopted. In this study, in order to predict the mechanical properties of hard coating on a soft polymer, the response of this coating system during nanoindentation was modelled. Various models, such as a viscoelastic model and fitting model, were adopted to analyse the indentation response of this coating system. By varying the substrate properties (i.e.,

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18

Chen, C. K., and M. C. Lin. "Hydromagnetic Stability of a Thin Viscoelastic Magnetic Fluid on Coating Flow Using Landau Equation." Journal of Mechanics 32, no. 5 (2016): 643–51. http://dx.doi.org/10.1017/jmech.2016.37.

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AbstractThis paper investigates the weakly nonlinear stability of a thin axisymmetric viscoelastic fluid with hydromagnetic effects on coating flow. The governing equation is resolved using long-wave perturbation method as part of an initial value problem for spatial periodic surface waves with the Walter's liquid B type fluid. The most unstable linear mode of a film flow is determined by Ginzburg-Landau equation (GLE). The coefficients of the GLE are calculated numerically from the solution of the corresponding stability problem on coating flow. The effect of a viscoelastic fluid under an app

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19

Kuo, Chi-Wei, and C. Steve Suh. "Dispersion and Attenuation of Guided Waves in Tubular Section with Multi-Layered Viscoelastic Coating — Part II: Circumferential Wave Propagation." International Journal of Applied Mechanics 09, no. 02 (2017): 1750016. http://dx.doi.org/10.1142/s1758825117500168.

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In the second part of the study on guided wave motions in a hollow cylinder with epoxy layers, shear and longitudinal modes propagating in the circumferential direction are investigated. The corresponding dispersion and attenuation characteristic equations are derived by incorporating a complex, frequency-dependent constitutive law for the viscoelastic coating material. Continuous displacement boundary conditions are implemented to model perfect interfacial bonds between the tubular section and applied epoxy coatings. The presence of thin dissipative viscoelastic layers has profound impact on

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20

Lee, Yong Woo, Won-Gi Ahn, Jaewook Nam, Hyun Wook Jung, and Jae Chun Hyun. "Operability windows in viscoelastic slot coating flows using a simplified viscoelastic-capillary model." Rheologica Acta 56, no. 9 (2017): 707–17. http://dx.doi.org/10.1007/s00397-017-1026-z.

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21

Kinnunen-Raudaskoski, Karita, Tuomo Hjelt, Ulla Forsstrom, Patrizia Sadocco, and Jouni Paltakari. "Novel thin functional coatings for paper by foam coating." April 2017 16, no. 04 (2017): 179–86. http://dx.doi.org/10.32964/tj16.4.179.

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Conventional coating methods are currently being challenged by newly developed technologies that can result in products with interesting properties and competitive prices. Versatile foam coating is one such promising technology. Foam coating is carried out using different foam application methods, and the viscoelastic nature of the foam allows the use of a large variety of materials. Paper was coated with nanomaterials on a pilot scale using a method based on slot die application combined with foam destruction by absorption and infrared drying. A thin layer of titanium dioxide/zinc oxide (TiO2

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22

Anazawa, Tomohiko, Takeaki Tsuda, Hiroshi Yoshiba, Takatsune Narumi, and Tomiichi Hasegawa. "Slot Coating Flows of Viscoelastic Fluid inside Dies." Nihon Reoroji Gakkaishi 37, no. 5 (2010): 239–46. http://dx.doi.org/10.1678/rheology.37.239.

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23

Kulik, V. M. "Deformation of viscoelastic coating in a turbulent flow." Thermophysics and Aeromechanics 16, no. 1 (2009): 43–55. http://dx.doi.org/10.1007/s11510-009-0004-z.

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24

Magdenkov, Vladimir A. "The New Type of Constrained Vibration-Damping Coating." Journal of Low Frequency Noise, Vibration and Active Control 15, no. 3 (1996): 107–13. http://dx.doi.org/10.1177/026309239601500301.

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Samples of new self-adhesive, constrained vibration-damping coatings (VDC) and layers for “sandwich” type plates for damping flexural waves in plates are described. These coatings consist of aluminium foil, perforated cardboard and layers of self-adhesive viscoelastic material. The results of measurements of the temperature-frequency characteristics of the loss factor of flexural waves in plates which are damped with these coatings are given. Methods of calculation of viscoelastic characteristics of multi-layer constructions are considered. The peculiarities of use of constrained and hard vibr

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25

Domenech, Luis, Víctor García-Peñas, Asta Šakalytė, Divya Puthukara Francis, Eskil Skoglund, and Fernando Sánchez. "Top Coating Anti-Erosion Performance Analysis in Wind Turbine Blades Depending on Relative Acoustic Impedance. Part 2: Material Characterization and Rain Erosion Testing Evaluation." Coatings 10, no. 8 (2020): 709. http://dx.doi.org/10.3390/coatings10080709.

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Under droplet impingement, surface leading edge protection (LEP) coating materials for wind turbine blades develop high-rate transient pressure build-up and a subsequent relaxation in a range of strain rates. The stress-strain coating LEP behavior at a working frequency range depends on the specific LEP and on the material and operational conditions, as described in this research in a previous work. Wear fatigue failure analysis, based on the Springer model, requires coating and substrate speed of sound measurements as constant input material parameters. It considers a linear elastic response

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26

Kulik, Victor M., Kwang-Hyo Jung, Ho-Hwan Chun, and In-Won Lee. "Analysis of Wave Decay Characteristics of Viscoelastic Compliant Coating." Transactions of the Korean Society of Mechanical Engineers B 30, no. 12 (2006): 1155–63. http://dx.doi.org/10.3795/ksme-b.2006.30.12.1155.

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27

Cheng, Po Jen, Kuo Chi Liu, and Cheng Chi Wang. "Nonlinear Evolution of the Travelling Waves in Roll Coating Flows of Thin Viscoelastic Polymer Falling Films." Applied Mechanics and Materials 479-480 (December 2013): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.45.

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Roll coating is widely used to apply a thin liquid film to a continuous, flexible substrate. It is known that macroscopic instabilities of the film system can result in a non-homogenous film growth to fluid flow. The influence of the Rossby number, the viscoelastic parameter, and the roller radius on the nonlinear hydrodynamic stability of a thin viscoelastic polymer fluid film coating flow down a rotating vertical roller is investigated. In contrast to most previous studies, the solution scheme employed in this study is based on a numerical approximation approach rather than an analytical met

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28

Torvik, Peter J. "Damping Properties of Hard Coatings for Engine Applications." Advances in Science and Technology 66 (October 2010): 126–35. http://dx.doi.org/10.4028/www.scientific.net/ast.66.126.

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Although blade coating materials dissipate vibratory energy while acting as thermal barrier coatings or protecting the substrate against corrosion or erosion, the inherent nonlinearity of these materials complicates the determination of the necessary material parameters. While plasma-sprayed ceramics alone do not appear to provide the desired levels of dissipation, notable increases in damping have been found to result from the inclusion of small amounts of viscoelastic materials. With proper selection of the added component, the resulting coating may be tailored for high damping in a specific

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29

Abbasnezhad, Navideh, Mohammadali Shirinbayan, Fatiha Chabi, Stephane Champmartin, Abbas Tcharkhtchi, and Farid Bakir. "Viscoelastic Behavior of Drug-Loaded Polyurethane." Polymers 13, no. 16 (2021): 2608. http://dx.doi.org/10.3390/polym13162608.

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Drug-eluting stents are desirable platforms for local medicine delivery. However, the incorporation of drugs into polymers can influence the mechanical and physicochemical properties of said matrix, which is a topic that is still poorly understood. In fact, this is more noticeable since the apposition is most often accompanied by mechanical stresses on the polymer coating, which can induce therapeutic failure that can result in death. It is therefore necessary to better understand their behavior by examining their properties in conditions such as those in living beings. We studied polyurethane

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30

Yamamoto, Takehiro, Takanori Suga, Kiyoji Nakamura, and Noriyasu Mori. "The Gas Penetration Through Viscoelastic Fluids With Shear-Thinning Viscosity in a Tube." Journal of Fluids Engineering 126, no. 2 (2004): 148–52. http://dx.doi.org/10.1115/1.1669402.

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The penetration of a long gas bubble through a viscoelastic fluid in a tube was studied. Experiments were carried out for two Newtonian and five polymeric solutions to investigate the relation between the coating film thickness and rheological properties of the test fluids. The polymeric solutions are viscoelastic fluids having shear-thinning viscosity. A bubble of air was injected into a tube filled with a test fluid to form hydrodynamic coating on a tube wall. The film thickness was evaluated by hydrodynamic fractional coverage m. The fractional coverage was characterized using the capillary

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31

Dimic-Misic, Katarina, Tuomo Salo, Jouni Paltakari, and Patrick Gane. "Comparing the rheological properties of novel nanofibrillar cellulose-formulated pigment coating colours with those using traditional thickener." Nordic Pulp & Paper Research Journal 29, no. 2 (2014): 253–70. http://dx.doi.org/10.3183/npprj-2014-29-02-p253-270.

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Abstract Nanocellulose containing materials, such as micro-fibrillated cellulose (MFC) and nanofibrillated cellulose (NFC), are potential additives which could improve strength properties of coated paper and board surfaces and thus substitute natural and synthetic cobinders, such as carboxymethyl cellulose (CMC) and polyacrylic thickeners, in pigmented coating formulations. The aim of this study is to evaluate whether MFC/NFC can be used in coating colours as sole co-binder. In this investigation, the change of rheological and dewatering behaviour of coating colours, having a single blend of p

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32

Khayat, R. E., and N. Ashrafi. "A boundary-element analysis for transient viscoelastic blade coating flow." Engineering Analysis with Boundary Elements 24, no. 5 (2000): 363–75. http://dx.doi.org/10.1016/s0955-7997(00)00016-3.

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33

Hsu, Tong C., Michael Malone, R. L. Laurence, and Stanley Middleman. "Separating forces in blade coating of viscous and viscoelastic liquids." Journal of Non-Newtonian Fluid Mechanics 18, no. 3 (1985): 273–94. http://dx.doi.org/10.1016/0377-0257(85)87003-8.

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34

Sullivan, Timothy M., and Stanley Middleman. "Film thickness in blade coating of viscous and viscoelastic liquids." Journal of Non-Newtonian Fluid Mechanics 21, no. 1 (1986): 13–38. http://dx.doi.org/10.1016/0377-0257(86)80060-x.

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35

Spaid, M. A., and G. M. Homsy. "Viscoelastic free surface flows: spin coating and dynamic contact lines." Journal of Non-Newtonian Fluid Mechanics 55, no. 3 (1994): 249–81. http://dx.doi.org/10.1016/0377-0257(94)80073-1.

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36

Khan, Zeeshan, Haroon Ur Rasheed, S. O. Alharbi, Ilyas Khan, Tariq Abbas, and Dennis Chin. "Manufacturing of Double Layer Optical Fiber Coating Using Phan-Thien-Tanner Fluid as Coating Material." Coatings 9, no. 2 (2019): 147. http://dx.doi.org/10.3390/coatings9020147.

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Modern optical fiber required a double-layer resin coating on the glass fiber to provide protection from signal attenuation and mechanical damage. The most important plastics resin used in coating of fiber optics are plasticized polyvinyle (PVC), low/high density polyethylene (LDPE/HDPE), nylon, and polysulfone. Polymer flow during optical fiber coating in a pressure type coating die has been simulated under non-isothermal conditions. The flow dependent on the wire or fiber velocity, geometry of the die, and the viscosity of the polymer. The wet-on-wet coating process is an efficient process f

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37

Kazakov, Kirill E., and Svetlana P. Kurdina. "Interaction of Viscoelastic Tube with Inner Nonuniform Coating of Variable Thickness and Rigid Cylindrical Insert." Key Engineering Materials 894 (July 27, 2021): 67–71. http://dx.doi.org/10.4028/www.scientific.net/kem.894.67.

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This work is devoted to the formulation and search of an analytical solution for the problem of the interaction of a rigid cylindrical body and a pipe with an inner coating in the case when the cylinder is placed inside such a pipe. It is assumed that the pipe coating can have a strong nonuniformity, and its thickness depends on the longitudinal coordinate. A special approach used in this work allows obtaining analytical solutions in which functions related to the properties and profile of the coating are separated by separate terms and factors. This allows us to provide efficient calculations

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38

Khan, Zeeshan, Saeed Islam, Rehan Ali Shah, Nasir Siddiqui, Murad Ullah, and Wahab Khan. "Double-layer optical fiber coating analysis using viscoelastic Sisko fluid as a coating material in a pressure-type coating die." Optical Engineering 56, no. 11 (2017): 1. http://dx.doi.org/10.1117/1.oe.56.11.116107.

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39

Arani, Ali Ghorbanpour, Seyed Abolfazl Mortazavi, and Zahra Khoddami Maraghi. "Dynamic stability of nanocomposite viscoelastic cylindrical shells coating with a piezomagnetic layer conveying pulsating fluid flow." Science and Engineering of Composite Materials 24, no. 3 (2017): 401–14. http://dx.doi.org/10.1515/secm-2015-0369.

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AbstractIn this study, the dynamic stability of an embedded viscoelastic composite cylindrical shell reinforced by boron nitride nanotubes (BNNTs) is investigated. The composite cylindrical shell is coated by a viscoelastic piezomagnetic layer and subjected to combined magneto-electro-mechanical loads. The composite polymer matrix and the coating layer are made of polyvinylidene fluoride (PVDF) and iron oxide (CoFe2O4), respectively. The composite cylindrical shell conveys pulsating fluid flows, which results in harmonic oscillations. The equivalent characteristics of composite are determined

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40

Tang, Yan Jun, You Ming Li, Guo Xin Xue, Yu Zhao, Xiu Mei Zhang, and Yong Zhang. "Effect of Carboxylated Styrene-Butadiene Rubber Latex Amount on the Viscoelastic Behavior of Paper Coating Modified with Nanosized Particles." Advanced Materials Research 236-238 (May 2011): 1322–25. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1322.

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The focus of this study is to investigate the effect of carboxylated styrene-butadiene rubber (SBR) latex on the dynamic rheologcial properties of paper coating suspensions modified with nanosized particles. The elastic storage modulus G′ and the viscid loss modulus G′′ are used to evaluate the dynamic rheologcial properties of paper coating suspensions. The effects of different amount carboxylated styrene-butadiene rubber latex on the flow parameters of paper coating suspensions are comparatively presented. It is shown that the dynamic elastic storage modulus G′ and viscid loss modules G′′ of

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41

Nadeem, Shoaib, Hasan Aftab Saeed, Imran Aziz, and Khalid Mehmood. "Effect of Ni₃Al Coating on Vibration Suppression of Beams of Various Thicknesses." Key Engineering Materials 875 (February 2021): 294–301. http://dx.doi.org/10.4028/www.scientific.net/kem.875.294.

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High cycle fatigue (HCF) caused by the vibratory stresses is the main cause of failure in many machine components, e.g. aircraft engine and gas turbine components, which has caused loss of many lives and billions of dollars. To avoid these kind of failures, vibratory stresses should be attenuated to an acceptable level, especially at resonant frequencies. A lot of previous studies have shown that thin coatings of different materials significantly reduced these vibratory stresses by adding extra damping to the system. These include viscoelastic materials, plasma graded coatings, piezoelectric m

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42

Masruroh, D. J. D. H. Djoko, Susi Rahayu, and S. P. Sakti. "Viscoelastic and Morphological Behavior of Stearic Acid Layer on Top of Polystyrene as Immobilisation Matrix for QCM Sensor." Materials Science Forum 848 (March 2016): 757–62. http://dx.doi.org/10.4028/www.scientific.net/msf.848.757.

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The effect of different solvents on the acoustic property and morphology of polystyrene (PS) and the stearic acid (SA) layer was investigated in this study. The acoustic property was analyzed by using impedance analyzer and morphology of SA layer in a quartz microbalance (QCM) sensor have been studied to quantify their effects on viscoelasticity within the sensor. The polystyrene coating on a QCM sensor was created by spin-coating with various solvents, such as chloroform and toluene, which contains a 3% polystyrene solution by mass. Then, the SA coating was deposited onto the polystyrene laye

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43

Yin, Hongna, Xingyuan Huang, Tongke Liu, and Minjie Song. "Effects of gas-assisted extrusion on slip in the cable coating process." Journal of Polymer Engineering 41, no. 4 (2021): 329–37. http://dx.doi.org/10.1515/polyeng-2020-0287.

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Abstract The isothermal viscoelastic finite element method is used to simulate and analyze the process of cable coating extrusion, in which the Navier slip model is adopted. The Phan–Thien–Tanner differential viscoelastic constitutive equation is used to describe the flow characteristics of the polymer melt. The polymer material used for simulation is polypropylene. The extrudate swell, velocity field, pressure field and shear stress field are calculated by finite element method. The influences of the gas-assisted extrusion and traditional extrusion on wall slip of cable coating extrusion are

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44

Mutlu, I., P. Townsend, and M. F. Webster. "Simulation of cable-coating viscoelastic flows with coupled and decoupled schemes." Journal of Non-Newtonian Fluid Mechanics 74, no. 1-3 (1998): 1–23. http://dx.doi.org/10.1016/s0377-0257(97)00069-4.

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45

Borkar, A. V., J. A. Tsamopoulos, S. A. Gupta, and R. K. Gupta. "Spin coating of viscoelastic and nonvolatile fluids over a planar disk." Physics of Fluids 6, no. 11 (1994): 3539–53. http://dx.doi.org/10.1063/1.868413.

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Li, Jingru, and Sheng Li. "Topology optimization of anechoic coating for maximizing sound absorption." Journal of Vibration and Control 24, no. 11 (2016): 2369–85. http://dx.doi.org/10.1177/1077546316685678.

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Anechoic coatings, attached to the surface of underwater vehicles, are an effective way to absorb the incident sound from active sonars. It is well known that a homogeneous viscoelastic material layer with limited thickness does not provide significant sound absorption performance, thus, anechoic coatings embedded with air cavities are being used for underwater applications. Previous optimization works on this type of anechoic coating mainly focused on the geometrical parameters, position and shape of the internal cavity, while ignoring the influence of the material distribution configuration.

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Kazakov, Kirill E. "On the Influence of Interlayer Nonuniformity on Contact Characteristics during the Interaction of a Pipe and a Rigid Cylindrical Insert." Key Engineering Materials 887 (May 2021): 706–10. http://dx.doi.org/10.4028/www.scientific.net/kem.887.706.

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Contact problem for viscoelastic aging pipe with a longitudinally nonuniform thin elastic internal coating and a rigid cylindrical insert is considered in the paper. The basic integral equation with integral operators of different types (mixed integral equation) is given. It's analytical solution for contact stresses in insert area is presented. The solution is constructed in such a way that the function describing the inner coating nonuniformity is distinguished by a separate factor. This fact allows one to perform accurate calculations even in cases where the coating properties are described

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Finegan, I. C., and R. F. Gibson. "Improvement of Damping at the Micromechanical Level in Polymer Composite Materials Under Transverse Normal Loading by the Use of Special Fiber Coatings." Journal of Vibration and Acoustics 120, no. 2 (1998): 623–27. http://dx.doi.org/10.1115/1.2893872.

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This paper describes preliminary results from a systematic analytical study of the improvement of damping in polymer composites at the micromechanical level under transverse normal loading by the use of special fiber coatings. Since shear deformations are important in damping of viscoelastic polymers, and large shear strains are generated in the region of the fiber/matrix interface, one idea for improving damping is to put a fiber coating made from a highly dissipative material in this region. A finite element model based on a “representative volume element” or repeating element of a continuou

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Zhao, Xianwen, Dejiang Shang, Chao Zhang, and Lu Yin. "Research on sound absorption characteristics of Alberich anechoic coatings in debonding states." MATEC Web of Conferences 283 (2019): 09008. http://dx.doi.org/10.1051/matecconf/201928309008.

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Viscoelastic structures with periodic cavity arrangement occupy an important position in acoustic stealth. Most studies focus on the absorption at low frequency, under large pressure and in a wide frequency band, however, the sound absorption properties of the anechoic coating in debonding states are seldom studied. The acoustic response of the composite structure is calculated by the FEM, and the incident wave and the reflected wave are separated based on the plane wave propagation principle. The sound absorption coefficient of the model can be solved with the pressure data of transmission wa

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Zahid, M., T. Haroon, MA Rana, and AM Siddiqui. "Roll coating analysis of a third grade fluid." Journal of Plastic Film & Sheeting 33, no. 1 (2016): 72–91. http://dx.doi.org/10.1177/8756087916628326.

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This paper studies the roll-coating process of an incompressible viscoelastic fluid, where the roll and the web have equal velocities. The lubrication approximation theory is used to simplify the equations of motion. Solutions for velocity profile, pressure gradient, flow rate per unit width, and shear stress at the roll surface are obtained by using a regular perturbation method. Integrated quantities of engineering interest are also calculated. These include the maximum pressure, separation point, roll/sheet separating force, power transmitted to the fluid by the roll, and coating thickness.

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