Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk


D. Dalmas

Ostatnie publikacje
1.  Lengiewicz J., Souza M., Lahmar M.A., Courbon C., Dalmas D., Stupkiewicz S., Scheibert J., Finite deformations govern the anisotropic shear-induced area reduction of soft elastic contacts, JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, ISSN: 0022-5096, DOI: 10.1016/j.jmps.2020.104056, Vol.143, pp.104056-1-19, 2020

Solid contacts involving soft materials are important in mechanical engineering or biomechanics. Experimentally, such contacts have been shown to shrink significantly under shear, an effect which is usually explained using adhesion models. Here we show that quantitative agreement with recent high-load experiments can be obtained, with no adjustable parameter, using a non-adhesive model, provided that finite deformations are taken into account. Analysis of the model uncovers the basic mechanisms underlying anisotropic shear-induced area reduction, local contact lifting being the dominant one. We confirm experimentally the relevance of all those mechanisms, by tracking the shear-induced evolution of tracers inserted close to the surface of a smooth elastomer sphere in contact with a smooth glass plate. Our results suggest that finite deformations are an alternative to adhesion, when interpreting a variety of sheared contact experiments involving soft materials.

Słowa kluczowe:
contact mechanics, friction, contact area, elastomer, full-field measurement

Afiliacje autorów:
Lengiewicz J. - IPPT PAN
Souza M. - inna afiliacja
Lahmar M.A. - inna afiliacja
Courbon C. - inna afiliacja
Dalmas D. - inna afiliacja
Stupkiewicz S. - IPPT PAN
Scheibert J. - Université de Lyon (FR)

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