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New Scratch Measurement Technique for Exterior Body Systems
Technical Paper
2001-01-0444
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
This paper will describe a novel method for quantifying the perceived scratch and mar susceptibility of polymer surfaces. For automotive applications the relevant parameter that determines customer satisfaction is the visual perception of scratch and mar. Visual perception of a discontinuity on a surface is based on the contrast between the damaged area and its surroundings. The observed contrast differences are a function of the way in which light is scattered from the damaged area, as well as the illumination and observation angles. We have developed an imaging system that uses two geometries to capture the major contrast elements differentiating a scratch from its surroundings. The data from the two geometries are processed to extract values for reflectivity of the sample surface as well as that of the damaged area under the two observation conditions. The optical imaging data will subsequently be related to data collected from visual assessments by test groups of people to generate a numeric assessment of Visual Quality.
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Authors
Citation
Rangarajan, P., Watkins, V., Harding, K., Blohm, M. et al., "New Scratch Measurement Technique for Exterior Body Systems," SAE Technical Paper 2001-01-0444, 2001, https://doi.org/10.4271/2001-01-0444.Also In
References
- Hunter, R.S.H. R,W. The Measurement of Appearance 2nd Edn Wiley Interscience
- Jones, F.N., et al Studies of microhardness and mar resistance using a scanning probe microscope Progress In Organic Coatings 1998 34 1 4
- Briscoe, B.J. Delfino A. Pelillo E. Single Pass pendulum scratching of PS & PMMA Wear 1999 225–229 319 328
- Briscoe, B.J.E. P.D. Pelillo, E. Sinha, S.K. Scratching Maps for Polymers Wear 1996 200 137 147
- Bethune, B. The surface cracking of glassy polymers under a sliding spherical indentor J. Mater. Sci 1976 11 199 205
- Belan-Gaiko, V.N. Experimental study of the deformability of polymers under nonstationary proportional loading at a complex stress state Probl. Prochn 1991 8 61 4
- Balta Calleja, F.J., et al Rolling deformation of Nylon 6,12 studied by microhardness: Influence of the hydrogen bonded planes Shizuoka Univ 1994 28 53
- Shen, W.D. Ye H.J. Jones F. Study of stress-hardening and fatigue of polymer coatings in marring with a scanning probe microscope Tribology Letters 1998 5 2 3
- Shen, W., et al Real time observation of viscoelastic creep of a polymer coating by scanning probe microscope Tribology Letters 1998 5 1 75 79
- Courter, J.L. Kamenetzky E.A. Micro- and nano-indentation and scratching for evaluating the mar resistance of clear coats 1999
- Ania, F. Martinez-Salazar J. Balta Calleja F.J. Physical aging and glass transition in amorphous polymers as revealed by microhardness J. Mater. Sci 1989 24 8 2934 8
- Bajpai, R., et al Annealed and Quenched Microhardness of PC under different conditions J. Polym. Mater 1998 Dec 329
- Balta Calleja, F.J., et al Correlation of microhardness and morphology in injection-molded poly(ethylene terephthalate) J. Mater. Sci 1993 28 22 6074 80
- Balta Calleja, F.J. Fakirov S. Recent advances in the study and characterisation of polymers by microhardness Trends in Polym. Sci 1997 5 8 246 9
- Lorenzo, V., et al Microhardness as a thermally activated process: indentation time dependence for an amorphous copolyester J. Appl. Polym. Sci 1993 48 1177 1181
- Parashar, P., et al Microhardness Measurement of Polypropylene, Polyethylene Terephthalate and Polytetrafluoroethylene 20 1 465 74
- Rikards, R., et al Study of the elastic properties of polymers from microhardness tests J. Polym. Eng 1997 17 3 179