Identification of young modulus profile in PVC foam core thickness using speckle inteferometry and inverse method

Carlos Ferreira; Pascal Casari; Rabah Bouzidi; Frédéric Jacquemin

doi:10.1117/12.695838

15 September 2006 Identification of young modulus profile in PVC foam core thickness using speckle inteferometry and inverse method

Carlos Ferreira, Pascal Casari, Rabah Bouzidi, Frédéric Jacquemin

Author Affiliations +

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 63412I (2006) https://doi.org/10.1117/12.695838
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

The aim of this paper is to investigate the mechanical properties of a PVC foam core and especially the Young modulus profile along a commercialised 50 mm beam thickness. The identification of the Young modulus gradient is realized through the uniaxial compression test of a 50 mm cube sample. The in-plane strain fields of one cube face under loading in both directions (longitudinal and transversal) are achieved using a diffuse light interferometric technique, the speckle interferometry. Next to that, a numerical model is built using finite elements code CAST3M. We choose a multilayer model in order to introduce spatial variation of the mechanical properties. The boundaries conditions are very close to those prescribed in the experimental tests. Finally, the present work shows that the non uniform profile of the Young modulus can be estimated by using a simple inverse method and the finite elements analysis to reproduce the experimental strain field.

Citation Download Citation

Carlos Ferreira, Pascal Casari, Rabah Bouzidi, and Frédéric Jacquemin "Identification of young modulus profile in PVC foam core thickness using speckle inteferometry and inverse method", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63412I (15 September 2006); https://doi.org/10.1117/12.695838

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