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Hertz beyond belief
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2014 (English)In: Soft Matter, ISSN 1744-683X, E-ISSN 1744-6848, Vol. 10, no 13, 2264-2269 p.Article in journal (Refereed) Published
Abstract [en]

We examine the validity of Hertz's linear elastic theory for central collisions of spheres using a viscoelastic model. This model explains why Hertz's theory is accurate in predicting the collision time and maximum contact area even when 40% of the kinetic energy is lost due to viscous dissipation. The main reason is that both the collision time and maximum contact area have a very weak dependence on the impact velocity. Moreover, we show that colliding objects exhibit an apparent size-dependent yield strength, which results from larger objects dissipating less energy at a given impact velocity.

Place, publisher, year, edition, pages
2014. Vol. 10, no 13, 2264-2269 p.
National Category
Physical Chemistry Polymer Technologies Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-102498DOI: 10.1039/c3sm53063aISI: 000332478800019OAI: oai:DiVA.org:su-102498DiVA: diva2:710434
Note

AuthorCount:2;

Available from: 2014-04-07 Created: 2014-04-07 Last updated: 2017-12-05Bibliographically approved

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