Determining Young’s modulus of coatings in vibrating reed experiments using irregularly shaped specimens

Rosemann, Nils W.; Fiedler, Torben; Sinning, H.‐R.; Bäker, Martin

doi:10.1016/j.rinma.2019.100022

Cited by 4 publications

(10 citation statements)

References 46 publications

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“…Since manufacturing of such samples is difficult, a method has been developed in the past where the geometry of irregularly shaped samples is determined using computer tomography and modeled in FEM simulations. This combination of vibrating reed and FEM was successfully implemented for thermally sprayed metallic and ceramic coatings, where a good agreement with mechanical tests was found [26,27]. Validation with monocrystalline silicon revealed a maximum difference of the measured Young's modulus of 0.4 % using the described procedure compared to literature values [26].…”

Section: Introductionmentioning

confidence: 71%

Temperature-Dependent Young’s Modulus of TaC- and TiC-Strengthened Co-Re-Based Alloys

Fiedler,

Seif,

Sinning

et al. 2024

Metals

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The knowledge of Young’s modulus is important for a quantitative assessment of strengthening contributions in CoRe alloys, such as strengthening by carbides. In this work, the temperature-dependent Young‘s modulus of monocarbide-strengthened CoRe-based alloys is measured using the vibrating reed technique. In this method, a reed-shaped sample is excited electrostatically, and the eigenfrequencies are determined. Using these frequencies, Young’s modulus can be derived analytically or, more reliably, assisted by finite element simulations. The resulting values for Young’s modulus are compared to theoretical estimations, and the influence of titanium- and tantalum-carbides on Young’s modulus is evaluated. It was found that low amounts of carbides increase Young’s modulus significantly. Analytical estimations are in good agreement with experimental results of TaC-containing alloys, whereas estimations for TiC-containing alloys are inaccurate.

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Section: Introductionmentioning

confidence: 71%

Temperature-Dependent Young’s Modulus of TaC- and TiC-Strengthened Co-Re-Based Alloys

Fiedler,

Seif,

Sinning

et al. 2024

Metals

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“…The mechanical properties of the thin-film coatings were obtained by measuring the Young’s modulus, which provides the stiffness or elasticity of the material as well as the adhesion force. Measuring the Young’s modulus of coatings is crucial to understanding the development of stresses in the coating due to the residual strains resulting from the drying process . Remarkably, the iodinated film showed greater stiffness compared to blank film, as evidenced from their respective Young’s modulus values: ∼1.8 GPa for the blank film and ∼2.5 GPa for the iodinated film (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…Measuring the Young's modulus of coatings is crucial to understanding the development of stresses in the coating due to the residual strains resulting from the drying process. 35 Remarkably, the iodinated film showed greater stiffness compared to blank film, as evidenced from their respective Young's modulus values: ∼1.8 GPa for the blank film and ∼2.5 GPa for the iodinated film (Figure 7). Uddin et al similarly found that iodine doping enhanced mechanical properties of fibers, specifically toughness and Young's modulus.…”

Section: Mechanical and Topographicalmentioning

confidence: 93%

Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Sekar,

Tirumkudulu,

Gundabala

2024

Langmuir

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Waterborne coatings with intrinsic antibacterial attributes have attracted significant attention due to their potential in mitigating microbial contamination while simultaneously addressing the environmental drawbacks of their solvent-based counterparts. Typically, antimicrobial coatings are designed to resist and eliminate microbial threats, encompassing challenges such as biofilm formation, fungal contamination, and proliferation of black mold. Iodine, when solubilized using ethylene glycol and incorporated as a complex into waterborne latex dispersions, has shown remarkable antimicrobial activity. Here, we demonstrate the effect of the film formation process of these iodinated latex dispersions on their antimicrobial properties. The effect of iodine on the surface morphology and mechanical, adhesion, and antimicrobial properties of the generated films was investigated. Complete integration and uniform distribution of iodine in the films were confirmed through UV−vis spectrophotometry and a laser Raman imaging system (LRIS). In terms of properties, iodinated films showed improved mechanical strength and adhesion compared with blank films. Further, the presence of iodine rendered the films rougher, making them susceptible to bacterial adhesion, but interestingly provided enhanced antibiofilm activity. Moreover, thicker films had a lower surface roughness and reduced biofilm growth. These observations are elucidated through the complex interplay among film thickness, surface morphology, and iodine properties. The insights into the interlink between the film formation process and antimicrobial properties of iodinated latex dispersions will facilitate their enhanced application as sustainable alternatives to solvent-based coatings.

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“…Pegas memiliki konstanta pegas (k), Sedangkan material memiliki modulus elastisitas (modulus young) yang merupakan perbandingan tegangan dan regangan. Modulus Young dapat ditentukan dengan menggunakan simulasi elemen hingga berdasarkan ukuran geometri benda [15]. Rumus frekuensi pribadi dapat dilihat pada persamaan 3.…”

Section: T =Periode Getaran (Sekon)unclassified

Perbandingan Eksperimental dan Simulasi Frekuensi Pribadi pada Struktur Spindel CNC

Hoten

Nurbaiti

Mainil

et al. 2020

JRM

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The Research was about the comparison between experiment and simulation of natural frequency in CNC spindle. CNC spindle vibration will reduce machine tool performance. It could lead to the damage of the machine tool. The spindle structure unbalances of machine tools will cause vibration when it is operated. In the CNC machine, the spindle shaft vibration should be minimum. Based on this point, the natural frequency testing on the spindle shaft structure was carried out. The experiments were conducted by employing oscilloscope which could provide the vibration data in the time domain. The data was converted into the frequency domain using FFT. Measurements were carried out on 7 times of testing. Every one time of testing, 10 data were taken at each testing points. The tests were conducted at 10 testing points. Therefore, the total data obtained were 700 test data. The test results were then compared with the results of simulation modeling in 10 vibrate modes using Solidwork software. After testing and simulations were compared, 4 personal frequency values were obtained in the test that uses a measuring instrument and 6 personal frequency values could not be read. These were because the accelerometer used could not read up to 0 Hz frequency. Natural frequency obtained from simulations and tests were expressed in the percentage of errors. The largest error value in the 9th vibration mode measurement with a natural frequency was 2117.96 Hz with an error of 0.32%. The smallest error value was 0.11% with a natural frequency of 2995.79 Hz.

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Determining Young’s modulus of coatings in vibrating reed experiments using irregularly shaped specimens

Cited by 4 publications

References 46 publications

Temperature-Dependent Young’s Modulus of TaC- and TiC-Strengthened Co-Re-Based Alloys

Temperature-Dependent Young’s Modulus of TaC- and TiC-Strengthened Co-Re-Based Alloys

Film Formation of Iodinated Latex Dispersions and Its Role in Their Antimicrobial Activity

Perbandingan Eksperimental dan Simulasi Frekuensi Pribadi pada Struktur Spindel CNC

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