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Apport de la microscopie à force atomique pour la détermination des propriétés mécaniquesélastiques du verre sous charges concentrées

Abstract : The nanoindentation is today a technical well established in a laboratory. At the beginning of this work, it was not, at least in his version of extension. There was the test of hardness and techniques for observing surface as atomic force microscopy .The idea is associate the two instruments to determine from observation of a profile imprint of hardness, mechanical properties elastic indented material. It finds that the establishment of three formulas will help to an exploitation of the profile. By comparing the modulus of Young E obtained by this method with those acquired by the technique of ultrasound, we underestimate the reality but using the definition of the factor of geometric shape, we are able to determine the stage of manufacture of seam and the phase of shear during a cycle of load and discharge. The use of indentation instrumented is legitimate to better understand what is happening when indentation, in particular the technique of the continuous measurement of the stiffness .When we compare the values obtained with those of the spread of ultrasonic waves, we overestimate the actual value. In this work, we are capable of frame the real value of Young Modulus by a technical original developed in LARMAUR and by the CMS. The shape factor is a good indicator o f the presence of bands of” pile- up” or “sinking- in” in the light of its value.
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https://tel.archives-ouvertes.fr/tel-00437981
Contributor : Claude Moysan <>
Submitted on : Tuesday, December 1, 2009 - 11:19:15 PM
Last modification on : Wednesday, January 13, 2021 - 9:40:36 AM
Long-term archiving on: : Thursday, June 17, 2010 - 11:01:08 PM

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  • HAL Id : tel-00437981, version 1

Citation

Claude Moysan. Apport de la microscopie à force atomique pour la détermination des propriétés mécaniquesélastiques du verre sous charges concentrées. Mécanique [physics.med-ph]. Université Rennes 1, 2009. Français. ⟨tel-00437981⟩

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