Characterisation of the Scratch Deformation Mechanisms for Poly(methylmethacrylate) using Surface Optical Reflectivity
✍ Scribed by Briscoe, B. J.; Pelillo, E.; Sinha, S. K.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 302 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0959-8103
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✦ Synopsis
A novel technique using surface local optical reÑectivity measurements for characterising the modes of surface mechanical damage of polymers is described. The technique utilises the sensed laser reÑectivity of polymer surfaces, after damage, as a means of measuring the relative extent of brittle and plastic deformation modes for polymers. The polymeric surface used in this paper is a commercial poly(methylmethacrylate). The surface damage is produced by scratching with rigid conical indenters under di †erent contact conditions of strain and load. The results show that the local optical reÑectivity of a surface depends upon the topography of the surfaces, which varies for di †erent modes of deformation. The reÑectivity of a brittle fractured surface is signiÐcantly lower in comparison with that for a plastically deformed surface.