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Genre/Form: article in peer-reviewed journal Material Type: Internet resource Document Type: Internet Resource, Archival Material All Authors / Contributors: Roux, Stéphane; Hild, François OCLC Number: 836649117 Language Note: ENG Abstract: A continuous pathway from digital images acquired during a mechanical test to quantitative identification of a constitutive law is presented herein based on displacement field analysis. From images, displacement fields are directly estimated within a finite element framework. From the latter, the application of the equilibrium gap method provides the means for rigidity field evaluation. In the present case, a reconditioned formulation is proposed for a better stability. Last, postulating a specific form of a damage law, a linear system is formed that gives a direct access to the (non-linear) damage growth law in one step. The two last procedures are presented, validated on an artificial case, and applied to the case of a biaxial tension of a composite sample driven up to failure. A quantitative estimate of the quality of the determination is proposed, and in the last application, it is shown that no more than 7% of the displacement field fluctuations are not accounted for by the determined damage law.

Title : Digital Image Mechanical Identification (DIMI)
Author : Roux, Stéphane; Hild, François
Language : it
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 12, 2021

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