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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wittmann, Benoît
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conferencepaper
Scratch resistance of floor covering surfaces
Abstract
International audience ; Floor covering are daily submitted to various mechanical solicitations: walking, rolling chairs, furniture feet indentation, sliding objects, cleaning devices etc. All these solicitations are liable to cause wear of the product, which negatively impacts its visual aspect. A wear mechanism which is particularly severe is the scratch. The aim of this project is to identify which kinds of scratches have a high optical influence and to prevent them. The final objective is to optimize the material (rheology, structure…) to increase its scratch resistance. Scratch tests have been performed on a material composed with a plasticized PVC substrate covered by an anti-scratch polyurethane coating. These tests are observed in situ thanks to a microscope coupled to a camera. Depending on the scratch test conditions (tip radius, normal force, temperature…), different deformation regimes (elastic, elastoplastic, plastic) and 3 different failure mechanisms are observed (figure 1). These mechanisms do not have the same optical influence: for example a ductile scratch is almost invisible by naked eye, even with the shallow and short lateral cracks (1 st mechanism), whereas a scratch with delamination (3 rd mechanism) is very visible because of a whitening of the material. In order to understand the local mechanical conditions during these tests, a numerical model of scratching has been developed. As shown in figure 2 the case of high load/indentation depth is clearly similar to failure mechanism 2. A variety of scratching conditions will be presented and analyzed, the strain and stress fields correlated with the corresponding failure mode. REFERENCES [1] J.-L. Bucaille, E.Felder, G.Hochstetter. Mechanical analysis of the scratch test on elastic and perfectly plastic materials with the three-dimensional finite element modeling. Wear 249 (2001) 422-432 [2] I. Demirci, C. Gauthier, R. Schirrer. Mechanical analysis of the damage of a thin polymeric coating during scratching: role of the coating thickness to ...