Integrated Digital Image Correlation for the Identification of Mechanical Properties

Leclerc, Hugo; Périé, Jean‐Noël; Roux, Stéphane; Hild, François

doi:10.1007/978-3-642-01811-4_15

Cited by 127 publications

(187 citation statements)

References 26 publications

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“…It also seems that the FE and analytical frequencies overestimate the actual vibration mode, certainly because of the use of approximate elastic parameters. This mismatch could be used to update the mechanical parameters using a space-time integrated approach [20,24,22]. Finally, the simulated and measured mode shapes were compared using a Modal Insurance Criterion (MAC) matrix.…”

Section: A Priori Mode Measurement Using Pgd-dicmentioning

confidence: 99%

“…In this paper we propose to prescribe time-smoothness as a physical regularization technique in the space domain. This technique should not be opposed to existing space regularization methods [20,30,31,28,11,33], but should be rather seen as an additional tool, which can positively complement more conventional remedies. More precisely, the method starts from a space-time formulation of DIC [6,8].…”

Section: Introductionmentioning

confidence: 99%

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A Space-Time PGD-DIC Algorithm:

2018

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The aim of this study is to develop a new regularized Digital Image Correlation (DIC) method for time dependent measurements. The correlation problem is written as a minimization problem over the space-time domain in a general formulation including 2D-DIC and Stereo DIC (SDIC). The unknown time-resolved displacement field is found as a sum of products of space and time functions, similarly to the Proper Generalized Decomposition in computational mechanics. It is shown that the space fields are less sensitive to noise as time regularity acts as a physical regularization of the space fields. The proposed method is illustrated by vibration measurement under harmonic excitation in 2D-DIC and SDIC.

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Section: A Priori Mode Measurement Using Pgd-dicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Space-Time PGD-DIC Algorithm:

2018

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“…FFT-DIC [33] and global DIC [34,35,36] have bene tted from the use of GPUs. Applications in radiotherapy for online registrations [37], or analyses of images from the International Space Station [38] are possible with very short computation time.…”

mentioning

confidence: 99%

Digital volume correlation: what are the limits to the spatial resolution?

Leclerc

Périé

Hild

et al. 2012

Mechanics & Industry

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116

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Most of the norms used in the eld of digital image (and volume) correlation to register two images (or volumes) lead to ill-posed problems. One of the frequent solutions is to enforce a restricted kinematics requiring a compromise between the richness of the solution (i.e., the spatial resolution) and the measurement uncertainty.An alternative route is to use a displacement norm that permits to alleviate this compromise by the means of a mechanical regularization used when the gray levels do not give enough information. It is then possible to compute a displacement vector for each pixel or voxel, inducing lower residuals (in terms of experimental data) while decreasing the noise sensitivity.The resolution performance of these di erent approaches is discussed, and compared for the analysis of a tensile test on a cast iron specimen based on a pair of tomographic images. As representative reconstructed volumes lead to a large number of degrees of freedom, a dedicated GPU computational strategy has been developed and implemented.Keywords: Global digital image correlation; GPU; Regularization.

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“…When de-parting from beam kinematics, the approach developed herein is generic and is applicable to cases where closed-form solutions exist [28,29], or numerical solutions [30] are computed. The key ingredient is to taylor the measured kinematics as closely as possible to the experiment, and to the (non linear)…”

Section: Discussionmentioning

confidence: 99%

Calibration of constitutive models of steel beams subject to local buckling by using digital image correlation

Hild¹,

Roux²,

Guerrero³

et al. 2011

European Journal of Mechanics - A/Solids

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It is proposed to identify the behavior of steel beams prior to and after the inception of local buckling by using Digital Image Correlation. Full field measurements are used to evaluate kinematic and static fields for determining constitutive laws. It enables for the detection of local buckling inception and the evaluation of the postbuckled behavior. Constitutive models are tuned by using measured Euler-Bernoulli kinematics.

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Integrated Digital Image Correlation for the Identification of Mechanical Properties

Cited by 127 publications

References 26 publications

A Space-Time PGD-DIC Algorithm:

A Space-Time PGD-DIC Algorithm:

Digital volume correlation: what are the limits to the spatial resolution?

Calibration of constitutive models of steel beams subject to local buckling by using digital image correlation

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