Strain gauges capable of measuring large cyclical deformations printed on elastic polymer films

Кондратов, А. П.; Yakubov, Vladislav; Volinsky, Alex A.

doi:10.1016/j.measurement.2020.108107

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…The model consists of parallel connected elements: elastic (with elastic modulus E) and viscous (with viscosity coefficient η). The relaxation time of this system is expressed by the equation [ 24 , 25 ]:

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Section: Resultsmentioning

confidence: 99%

“…This causes excessive dot gain of thin strokes and dotted features, such as letters and halftone dots, during printing and high pressure on the printed substrate. The compression pressure increases many times after the penetration of water and dichloroethane into the porous structure of the composite web through the layers of cotton fabric [ 25 , 26 ]. The relaxation time is 0.64 s and the compression time is 0.66 s. These liquids have close values of the dipole moments of the molecules.…”

Section: Resultsmentioning

confidence: 99%

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Compression Relaxation of Multi-Structure Polymer Composites in Penetrating Liquid Medium

et al. 2022

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Multi-structural polymer composites are widely used in the mechanical engineering, automotive, aviation and oil refining industries, as well as in the printing industry as a shock-absorbing deckle on the offset cylinders of printing machines. During offset printing, composites come into contact with inks and washing solutions, the components of which penetrate the material and cause the polymers to swell. This process degrades the print quality, and for this reason the study of its features is relevant. The prerequisites for this work are the study of the fundamental laws of diffusion and sorption of liquids by polymers with different micro- and macro-structures in different physical states and in different forms (e.g., films, sheets, fibers and fabrics). The combination of polymer materials in the composition of multi-structural fabric blankets makes it possible to obtain materials with unique mechanical properties and high resistance to liquid penetrating media and to use them in high-tech processes of multi-color printing with high resolution and color rendering. This article reports for the first time the kinetics and thermodynamics results obtained from the swelling of multi-structural polymeric blankets in solvents used in printing, and the effect of sorption of different polar liquids on the viscoelastic strain under compression during the operation of the damping systems of printing machines. Using mathematical models of activated liquid diffusion in polymers and deformation of a viscoelastic body, the swelling rate constants, solvent diffusion coefficients (the kinetic characteristics of the swelling process) and Flory–Huggins parameters (the thermodynamic characteristics of the interaction of the solvent with the composite) for composite–solvent systems with several chemical composition variants were determined. The elastic modulus and the viscosity coefficient of the composite under liquid saturation were calculated based on the experimental cyclic compression data. The range of change in the compression and restoration times of the polymeric blankets (0.09 s ÷ 0.78 s) was determined. It was shown that the composite swelled to a limited extent in all the studied liquids. All solvents used were thermodynamically poor (χ > 0.5). It has been established that rubber–fabric blankets coated with nitrile rubber are the least resistant to the action of dichloroethane, and that blankets with layers of polyolefins are not resistant to ethyl acetate. Water significantly affects the physicochemical properties of rubber–fabric blankets with a large proportion of cotton fabric layers. The data obtained can serve as a basis for optimizing the compositions of inks and cleaning solutions, as well as a theoretical basis for the thermodynamics of composite–solvent systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Compression Relaxation of Multi-Structure Polymer Composites in Penetrating Liquid Medium

et al. 2022

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“…The current mainstream strain measurement methods can be divided into two categories according to the measurement principle: contact and non-contact measurements. The resistive strain gauge measurement method is a typical approach in contact-based measurements [6,7]. Its origins can be traced back to the 1940s when Bierman [8] initiated research on strain gauges.…”

Section: Introductionmentioning

confidence: 99%

Design and application testing of imaging probe for strain measurement

Yu,

Cheng,

Tang

et al. 2023

J. Inst.

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To address the challenge of obtaining key device strain parameters within narrow spaces, this paper presents the design of a small-sized optical imaging probe with an independent optical system based on the basic principle of digital image correlation (DIC). To validate the strain measurement accuracy of the probe, a high-temperature heating system was built under in a laboratory setting, and experimental tests involving room temperature strain measurement and high temperature thermal expansion coefficient measurement were conducted. The findings demonstrate the potential of the developed probe for strain measurement in critical components situated in restricted spaces.

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A Review of the Design and Feasibility of Intelligent Water-Lubrication Bearings

Xue

Guo

Zhao

et al. 2022

J. Marine. Sci. Appl.

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Strain gauges capable of measuring large cyclical deformations printed on elastic polymer films

Cited by 4 publications

References 27 publications

Compression Relaxation of Multi-Structure Polymer Composites in Penetrating Liquid Medium

Compression Relaxation of Multi-Structure Polymer Composites in Penetrating Liquid Medium

Design and application testing of imaging probe for strain measurement

A Review of the Design and Feasibility of Intelligent Water-Lubrication Bearings

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