An alternative to modal analysis for material stiffness and damping identification from vibrating plates

Giraudeau, Alain; Pierron, Fabrice; Guo, Baoqiao

doi:10.1016/j.jsv.2009.11.031

Cited by 36 publications

(24 citation statements)

References 44 publications

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“…This approach has already been successfully applied in vibration to identify damping properties of thin plates [41][42][43][44][45] but never to a high strain rate loading cases.…”

Section: Second Test: Tensile Coupon Without Holementioning

confidence: 99%

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

et al. 2010

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract The present paper deals with full-field strain measurement on glass/epoxy composite tensile specimens submitted to high strain rate loading through a split Hopkinson pressure bar (SHPB) device and with the identification of their mechanical properties. First, the adopted methodology is presented: the device, including an Ultra-High Speed camera, and the experimental procedure to obtain relevant displacement maps are described. The different full-field results including displacement, strain and acceleration maps for two mechanical tests are then addressed. The last part of the paper deals with an original procedure to identify stiffnesses on this dynamic case only using the actual strain and acceleration maps (without the applied force) by using the Virtual Fields Method.

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“…This approach has already been successfully applied in vibration to identify damping properties of thin plates [41][42][43][44][45] but never to a high strain rate loading cases.…”

Section: Second Test: Tensile Coupon Without Holementioning

confidence: 99%

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

et al. 2010

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“…In this case, high speed imaging is not necessary and the acceleration derives easily from the deflection using the harmonic assumption. This was extended later on to include damping [7]. Recently, an article showed that ultrasonic excitation combined with ultra-high speed and infrared imaging [37] could be used to image the high strain-rate deformation of a polymeric foam, though the authors did not use the acceleration to identify stiffness.…”

Section: Introductionmentioning

confidence: 99%

A Novel Image-based Ultrasonic Test to Map Material Mechanical Properties at High Strain-rates

Seghir

Pierron

2017

Exp Mech

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An innovative identification strategy based on high power ultrasonic loading together with both infrared thermography and ultra-high speed imaging is presented in this article. It was shown to be able to characterize the viscoelastic behaviour of a polymer specimen (PMMA) from a single sample over a range of temperatures and strainrates. The paper focuses on moderate strain-rates, i.e. from 10 to 200 s −1 , and temperatures ranging from room to the material glass transition temperature, i.e. 110 • C. The main originality lies in the fact that contrary to conventional Dynamic Mechanical Thermal Analysis (DMTA), no frequency or temperature sweep is required since the experiment is designed to simultaneously produce both a heterogeneous strain-rate state and a heterogeneous temperature state allowing a local and multi-parametric identification. This article is seminal in nature and the test presented here has good potential to tackle a range of other types of high strain-rate testing situations.

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“…In both cases, the acceleration information serves as a load cell, and the load cell gauge factor is the material density. Finally, several studies have shown that elastic [35,36] and viscoelastic [37] stiffness components could be identified from full-field measurements and the VFM [38] using the inertial forces as load cell.…”

Section: Introductionmentioning

confidence: 99%

Beyond Hopkinson's bar

Pierron

Zhu

Siviour

2014

Phil. Trans. R. Soc. A.

122

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In order to perform experimental identification of high strain rate material models, engineers have only a very limited toolbox based on test procedures developed decades ago. The best example is the so-called split Hopkinson pressure bar based on the bar concept introduced 100 years ago by Bertram Hopkinson to measure blast pulses. The recent advent of full-field deformation measurements using imaging techniques has allowed novel approaches to be developed and exciting new testing procedures to be imagined for the first time. One can use this full-field information in conjunction with efficient numerical inverse identification tools such as the virtual fields method (VFM) to identify material parameters at high rates. The underpinning novelty is to exploit the inertial effects developed in high strain rate loading. This paper presents results from a new inertial impact test to obtain stress–strain curves at high strain rates (here, up to 3000 s −1 ). A quasi-isotropic composite specimen is equipped with a grid and images are recorded with the new HPV-X camera from Shimadzu at 5 Mfps and the SIMX16 camera from Specialised Imaging at 1 Mfps. Deformation, strain and acceleration fields are then input into the VFM to identify the stiffness parameters with unprecedented quality.

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An alternative to modal analysis for material stiffness and damping identification from vibrating plates

Cited by 36 publications

References 44 publications

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

A Novel Image-based Ultrasonic Test to Map Material Mechanical Properties at High Strain-rates

Beyond Hopkinson's bar

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