Determination of the Dynamic Young’s Modulus and Poisson’s Ratio Based on Higher Frequencies of Beam Transverse Vibration

Chirikov, Victor Alexeevich; Dimitrov, D. M.; Boyadjiev, Yordan Simeonov

doi:10.1016/j.promfg.2020.03.014

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…Various methods are developed to measure these parameters, including static methods, like nano-indentation [50,51] and dynamic methods like resonance response. [52][53][54][55] Many studies aiming to design highperformance nanomechanical resonators have relied on mechanical parameter values obtained from the literature without considering potential variations of thin film properties due to different deposition environments, such as commonly used materials like a-Si 3 N 4 , [10,12] c-Si, [14] and c-SiC. [15,16] While these adaptations are usually reasonable and align well with experimental results, characterizing the exact parameters of the materials used would be beneficial when exploring the optimal performance of nanomechanical resonators.…”

Section: Mechanical Property Characterization With Resonance Methodsmentioning

confidence: 99%

High‐Strength Amorphous Silicon Carbide for Nanomechanics

Xu,

Shin,

Sberna

et al. 2023

Advanced Materials

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For decades, mechanical resonators with high sensitivity have been realized using thin‐film materials under high tensile loads. Although there have been remarkable strides in achieving low‐dissipation mechanical sensors by utilizing high tensile stress, the performance of even the best strategy is limited by the tensile fracture strength of the resonator materials. In this study, a wafer‐scale amorphous thin film is uncovered, which has the highest ultimate tensile strength ever measured for a nanostructured amorphous material. This silicon carbide (SiC) material exhibits an ultimate tensile strength of over 10 GPa, reaching the regime reserved for strong crystalline materials and approaching levels experimentally shown in graphene nanoribbons. Amorphous SiC strings with high aspect ratios are fabricated, with mechanical modes exceeding quality factors 108 at room temperature, the highest value achieved among SiC resonators. These performances are demonstrated faithfully after characterizing the mechanical properties of the thin film using the resonance behaviors of free‐standing resonators. This robust thin‐film material has significant potential for applications in nanomechanical sensors, solar cells, biological applications, space exploration and other areas requiring strength and stability in dynamic environments. The findings of this study open up new possibilities for the use of amorphous thin‐film materials in high‐performance applications.This article is protected by copyright. All rights reserved

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Section: Mechanical Property Characterization With Resonance Methodsmentioning

confidence: 99%

High‐Strength Amorphous Silicon Carbide for Nanomechanics

Xu,

Shin,

Sberna

et al. 2023

Advanced Materials

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“…Excluding the base cone, where thermal gradient and cross-section variations may result in microstructural differences, the microstructure appears homogeneous and continuous along the build direction and shows no significant variations. Moreover, the dynamic properties of the specimen predominantly rely on the microstructure of the majority of the material volume involved in the test, and any minor variation in the microstructure would produce a negligible effect on the test results [63,72].…”

Section: Material's Microstructurementioning

confidence: 99%

Impact of process parameters on the dynamic behavior of Inconel 718 fabricated via laser powder bed fusion

Abruzzo,

Macoretta,

Monelli

et al. 2024

Int J Adv Manuf Technol

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In this research, we investigate the dynamic behavior of Inconel 718 fabricated through laser powder bed fusion (L-PBF), addressing a notable knowledge gap regarding the correlation between process parameters and dynamic properties. The process parameters adopted are deducted from an extension of the Rosenthal solution, formulated to increase the process productivity while avoiding the typical production process defects. The dynamic Young modulus and the structural damping of the material are estimated as a function of the process parameters through ping tests reproducing the flexural vibrations of the specimens in as-built, solutioned, and aged conditions. The microstructure and porosity are investigated through metallographic analyses. The results show a substantial influence of the L-PBF process parameters on the dynamic Young modulus, which markedly increases as the energy density is reduced (23%) and progressively becomes more similar to the conventionally produced material. This influence stands in stark contrast to the relatively modest impact of heat treatments, which underlines a negligible effect of the process-induced residual stress. The structural damping remained approximately constant across all test conditions. The elastic response of the material is found to be primarily influenced by the different microstructures produced as the L-PBF process parameters varied, particularly in terms of the dimensions and shape of the solidification structures. The unexpected relationship between the dynamic Young modulus, energy density, and microstructure unveils the potential to fine-tune the material’s dynamic behavior by manipulating the process parameters, thereby carrying substantial implications for all the applications of additively manufactured components susceptible to significant vibratory phenomena.

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“…The system is setup as figure 2.1. The impulse excitation technique setup is based on the ASTM E-1876 [10]. The specimen is placed on a structure with the supports of 0.224 of total length from each end.…”

Section: Setup Of the Systemmentioning

confidence: 99%

Development of a low-cost non-destructive test system for measurement of elastic modulus

Chio

Singh

2023

J. Phys.: Conf. Ser.

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Conventional measurement processes to determine elastic modulus of samples such as tensile or flexural test and bending test are typically unidirectional and destructive in nature for the measured samples. The industrial grade and commercially available Non-Destructive Test (NDT) measurement instrument based on the impulse excitation technique is meanwhile expensive. This project involves designing and developing a low-cost NDT system for the measurement of elastic modulus based on the impulse excitation technique. Secondly, it is to compare the performance of the measurement system with the tensile test. The performance of the NDT prototype will be put to test by using different type of specimens such as aluminium alloy, copper, brass, and carbon steel. Each type of specimen will carry be tested three times to get the average of the data. After all the data collection of the NDT measurement system, the tensile test will be carried out. A comparison for the measurement of the elastic modulus will be conducted between the NDT system, tensile test, and theoretical results. The expected outcome for this project is to develop a NDT for the measurement of the elastic modulus. This project also aims to reduce the industrial waste, reduce the cost of the sample test and maintain the accuracy and the performance of the NDT system compared with the tensile test.

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Determination of the Dynamic Young’s Modulus and Poisson’s Ratio Based on Higher Frequencies of Beam Transverse Vibration

Cited by 9 publications

References 7 publications

High‐Strength Amorphous Silicon Carbide for Nanomechanics

High‐Strength Amorphous Silicon Carbide for Nanomechanics

Impact of process parameters on the dynamic behavior of Inconel 718 fabricated via laser powder bed fusion

Development of a low-cost non-destructive test system for measurement of elastic modulus

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