Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/4413
Title: | Quantifying Plasticity-independent Creep Compliance and Relaxation of Viscoelastoplastic Materials Under Contact Loading |
Authors: | Constantinides, Georgios Vandamme, Matthieu Tweedie, Catherine A. Ulm, Franz Josef Vliet, Krystyn J Van |
Major Field of Science: | Engineering and Technology |
Field Category: | Materials Engineering |
Keywords: | Plasticity;Polymers;Elastic analysis (Engineering) |
Issue Date: | Oct-2011 |
Source: | Journal of Materials Research, 2012, vol. 27, no. 1, pp. 302-312 |
Volume: | 27 |
Issue: | 1 |
Start page: | 302 |
End page: | 312 |
Journal: | Journal of Materials Research |
Abstract: | Here we quantify the time-dependent mechanical properties of a linear viscoelastoplastic material under contact loading. For contact load relaxation, we showed that the relaxation modulus can be measured independently of concurrent plasticity exhibited during the loading phase. For indentation creep, we showed that the rate of change of the contact creep compliance L̇(t) can be measured independently of any plastic deformation exhibited during loading through L̇(t) = 2a(t)ḣ(t)/P max, where a(t) is the contact radius, h(t) is the displacement of the contact probe, and P max is the constant applied load during the creep phase. These analytical relations were compared with numerical simulations of conical indentation creep for a viscoelastoplastic material and validated against sharp indentation creep experiments conducted on polystyrene. The derived relations enable extraction of viscoelastic material characteristics, even if sharp probes confer concurrent plasticity, applicable for a general axisymmetric contact probe geometry and a general time-independent plasticity. |
URI: | https://hdl.handle.net/20.500.14279/4413 |
ISSN: | 20445326 |
DOI: | 10.1557/jmr.2011.302 |
Rights: | © Cambridge University Press |
Type: | Article |
Affiliation : | Massachusetts Institute of Technology Universite Paris Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
CORE Recommender
Sorry the service is unavailable at the moment. Please try again later.
Items in KTISIS are protected by copyright, with all rights reserved, unless otherwise indicated.