Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/4305
Title: | Finite element modeling of nanoindentation on C-S-H: Effect of pile-up and contact friction |
Authors: | Constantinides, Georgios Sarris, Ernestos |
metadata.dc.contributor.other: | Κωνσταντινίδης, Γιώργος |
Major Field of Science: | Engineering and Technology |
Field Category: | Materials Engineering |
Keywords: | Calcium silicates;Finite element method;Friction;Tribology |
Issue Date: | Feb-2013 |
Source: | Cement and Concrete Composites, 2013, vol. 36, no. 1, pp. 78-84 |
Volume: | 36 |
Issue: | 1 |
Start page: | 78 |
End page: | 84 |
Journal: | Cement and Concrete Composites |
Abstract: | In this paper we computationally study the indentation response of a rigid axisymmetric indenter on a semi-infinite elasto-plastic material of the Mohr-Coulomb type. The finite element method is used to quantify the effect of material properties (E, c,) and contact friction (μ) on the indentation response of C-S-H phases. The high E/c-ratio for both C-S-H phases, together with their cohesive-frictional behavior, leads to pile-up phenomena around the penetrated probe. The influence of all these parameters on the actual area of contact and its subsequent effect on commonly extracted quantities of the indentation test, namely indentation modulus (M) and indentation hardness (H), is investigated. It is shown that contact friction affects the contact area between the indenter and indented material and as a consequence interferes, to a certain extent, with the procedure for estimating elastic and plastic material properties. The effect is more pronounced for the hardness measurements. |
URI: | https://hdl.handle.net/20.500.14279/4305 |
ISSN: | 09589465 |
DOI: | 10.1016/j.cemconcomp.2012.10.010 |
Rights: | © Elsevier |
Type: | Article |
Affiliation : | Massachusetts Institute of Technology Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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