Rev. Met. Paris
Volume 100, Number 5, May 2003Science et Génie des Matériaux
Matériaux et microscopies
|Page(s)||567 - 575|
|Published online||17 November 2003|
Microextensometry: a tool for the mechanics of materials
A technique, which allows characterizing the local strain field over a domain representative of the microstructure of a heterogeneous material, is described. It is based on scanning electron microscopy, microelectrolithography, image analysis and in situ mechanical tests. On one hand, in relation with a microstructure analysis, it allows characterizing the different mechanisms responsible for the plasticity or the damage of materials. On the other hand, a quantitative analysis allows comparing and validating from a local to a global scale, the different models used for the prediction of materials constitutive laws. Finally, the knowledge of the experimental displacement improves seriously the results of finite element computations, by a better determination of the boundary conditions.
© La Revue de Métallurgie, 2003
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