Measurement of the Isotropic Dynamic Young's Modulus in a Seismically Excited Cantilever Beam Using a Laser Sensor

Caracciolo, Roberto; Gasparetto, Alessandro; Giovagnoni, Marco

doi:10.1006/jsvi.1999.2736

Cited by 21 publications

(10 citation statements)

References 10 publications

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“…Nevertheless, the main inconvenience of ASTM E 756-04 standard consists in introducing additional damping or mass through the excitation or through the measurement devices. Many authors investigated these inconveniences [11], which lead to generate alternative methods with improved accuracy [12][13][14][15][16][17][18][19][20].…”

Section: Experimental Characterization Of a Flexible Adhesivementioning

confidence: 99%

Dynamic Characterization of Adhesive Materials for Vibration Control

García-Barruetabeña¹,

Cortés²

2016

Adhesives - Applications and Properties

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This chapter focuses on the dynamic characterization of adhesive materials for vibration control proposes. First, the experimental characterization and modelization of the relaxation and complex moduli of the flexible adhesive ISR 70-03 by means of a dynamic mechanical thermal analysis technique (DMTA) are presented. Then, the interconversion path between the relaxation modulus EðtÞ and the corresponding complex modulus E Ã ðωÞ for linear viscoelastic solid materials is explored. In contrast to other approximate methods, in this work the fast Fourier transform (FFT) algorithm is directly applied on relaxation functions. Finally, an experimental study for the structural noise and vibration reduction in a cabin elevator by means of adhesive-bonded joints of panels is presented.

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Section: Experimental Characterization Of a Flexible Adhesivementioning

confidence: 99%

Dynamic Characterization of Adhesive Materials for Vibration Control

García-Barruetabeña¹,

Cortés²

2016

Adhesives - Applications and Properties

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“…Extending this kind of investigation to continuous systems would be of crucial concern when viscoelastic properties of materials must be properly established. In particular, it is quite common in the experimental assessments of the viscoelastic properties of these materials, to consider beam-like structures as standard geometries [18,19,20]. With the aim to shed light on the vibrational behaviour of such systems, in this paper a detailed study of the dynamics of a viscoelastic beam is presented.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic Beam Dynamics: Theoretical Analysis on Damping Mechanisms

Pierro¹

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Viscoelastic materials are widely utilized in different engineering areas, however it is still not so easy to properly assess their mechanical properties, in terms of viscoelastic-frequency dependent modulus. Standard experimental procedures are utilized in this direction (e.g. DMA-Dynamic mechanical analysis), but such techniques still present some complexities, and this is why possible alternative approaches would be desirable. For example, the experimental investigation of a viscoelastic beam dynamics would be challenging, especially for the intrinsic simplicity of this kind of test. In this direction, a deep understanding of damping mechanisms in viscoelastic beams results to be a quite important task to better predict their dynamics. With the aim to elucidate damping properties in such structures, in this paper an analytical study of the transversal vibrations of a viscoelastic beam is presented. By means of a dimensional analysis, some key parameters are presented, which depend on the material properties and the beam geometry. In this way, by properly tuning such disclosed parameters, e.g. the dimensionless beam length once the material is chosen, it is possible to enhance or suppress some resonant peaks, one at a time or more simultaneously. This is a remarkable possibility to efficiently control damping in these structures, and the results presented in this paper may help in elucidating experimental procedures for the characterization of viscoelastic materials. 4396 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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“…Recently, optical techniques have been attractive for measuring mechanical properties, such as the application of the laser sensor [ 12 , 13 , 14 ], the interference of light beams [ 15 ], atomic force microscope [ 16 ], and electronic speckle pattern interferometry [ 17 ] and so on. Optical feedback self-mixing interferometry (SMI) technique, a new kind of laser interferometry, is an effective way to measure the vibration period and displacement of the external target, even some important useful material parameters.…”

Section: Introductionmentioning

confidence: 99%

A Fiber-Coupled Self-Mixing Laser Diode for the Measurement of Young’s Modulus

Lin

et al. 2016

Sensors

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This paper presents the design of a fiber-coupled self-mixing laser diode (SMLD) for non-contact and non-destructive measurement of Young’s modulus. By the presented measuring system, the Young’s modulus of aluminum 6061 and brass are measured as 70.0 GPa and 116.7 GPa, respectively, showing a good agreement within the standards in the literature and yielding a much smaller deviation and a higher repeatability compared with traditional tensile testing. Its fiber-coupled characteristics make the system quite easy to be installed in many application cases.

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Measurement of the Isotropic Dynamic Young's Modulus in a Seismically Excited Cantilever Beam Using a Laser Sensor

Cited by 21 publications

References 10 publications

Dynamic Characterization of Adhesive Materials for Vibration Control

Dynamic Characterization of Adhesive Materials for Vibration Control

Viscoelastic Beam Dynamics: Theoretical Analysis on Damping Mechanisms

A Fiber-Coupled Self-Mixing Laser Diode for the Measurement of Young’s Modulus

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