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Microtomography on polypropylene foam under dynamic loading: 3D analysis of bead morphology evolution

Type
Articles dans des revues avec comité de lecture
Author
VIOT, Philippe
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
PLOUGONVEN, Erwan
481 Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
BERNARD, Dominique
481 Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

URI
http://hdl.handle.net/10985/8270
DOI
10.1016/j.compositesa.2007.11.014
Date
2008
Journal
Composites Part A: Applied Science and Manufacturing

Abstract

A dynamic crash loading experiment is performed on polypropylene foam which is used in composite sandwich structures for safety applications. Several interrupted shocks are conducted, in between which, microtomographic acquisitions are made showing the change of the sample during its compression. These data can help construct and validate predictive models, although, because this material is multi-scale (constitutive beads at the mesoscopic scale are made of microscopic closed cells), image processing is required to extract useful quantitative measurements. Such processing is described here, so as to determine a representative volume for each bead of the sample, to associate values such as bead density to each bead and to each stage of the compression. This can help build a predictive model at the mesoscopic scale.

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