Indentation; Friction; Piling-up or Sinking-in; Hardness; Finite element
Abstract :
[en] A comprehensive computational study is undertaken to identify the influence of friction in
material characterization by indentation measurement based on elasto- plastic solids. The impacts of friction on load versus indentation depth curve, and the values of calculated hardness and Young's modulus in conical and spherical indentations are shown in this paper. The results clearly demonstrate that, for some elasto-plastic materials, the curves of load versus indentation depth obtained either by spherical or conical indenters with different friction coefficients, cannot be distinguished. However, if utilizing the parameter (see text for details), to quantify the deformation of piling-up or sinking-in, it is easy to find that the influence of friction on piling-up or sinking-in in indentation is significant. Therefore, the material parameters which are related to the projected area will also have a large error caused by the influence of friction. The maximum differences on hardness and Young's modulus can reach 14.59% and 6.78%, respectively, for some elastic materials shown in this paper. These results do not agree with those from researchers who stated that the instrumented indentation experiments are not significantly affected by friction.
Oliver, W.C., An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments (1992) Journal of Materials Research, 7, pp. 1564-1583
Luo, J., A study on the determination of plastic properties of metals by instrumented indentation using two sharp indenters (2007) International Journal of Solids and Structures, 44, pp. 5803-5817
Dao, M., Computational modeling of the forward and reverse problems in instrumented sharp indentation (2001) Acta Materialia, 49, pp. 3899-3918
Tabor, D., (1951) Hardness of Metals, , Clarendon Press Oxford
Swadener, J.G., Determination of elastoplastic properties by instrumented sharp indentation (2002) Journal of the Mechanics and Physics of Solids, 50, pp. 681-694
Suresh, S., (1998) A New Method for Estimating Residual Stresses by Instrumented Sharp Indentation
Yan, W.Y., Analysis of spherical indentation of superelastic shape memory alloys (2007) International Journal of Solids and Structures, 44, pp. 1-17
Solberg, J.M., A family of simple two-pass dual formulations for the finite element solution of contact problems (2007) Computer Methods in Applied Mechanics and Engineering, 196, pp. 782-802
Antunes, J.M., A study on the determination of plastic properties of metals by instrumented indentation using two sharp indenters (2007) International Journal of Solids and Structures, 44, pp. 5803-5817
Youn, S.W., Fea study on nanodeformation behaviors of amorphous silicon and borosilicate considering tip geometry for pit array fabrication (2005) Materials Science and Engineering, 390, pp. 233-239
Lee, H., A numerical approach to spherical indentation techniques for material property evaluation (2005) Journal of the Mechanics and Physics of Solids, 53, pp. 2037-2069
Kucharski, S., Mroz, Z., Identification of plastic hardening parameters of metals from spherical indentation tests (2001) Materials Science and Engineering A, 318 (1-2), pp. 65-76. , DOI 10.1016/S0921-5093(01)01334-X, PII S092150930101334X
Mata, M., The role of friction on sharp indentation (2004) Journal of the Mechanics and Physics of Solids, 54, pp. 145-165
Johnson, K.L., (1985) Contact Mechanics, , Cambridge University press
Hernot, X., Influence of penetration depth and mechanical properties on contact radius determination for spherical indentation (2006) International Journal of Solids and Structures, 43, pp. 4136-4153
Bucaille, J.L., Determination of plastic properties of metals by instrumented indentation using different sharp indenters (2003) Acta Materialia, 51, pp. 1663-1678
Ponthot, J.P., http://metafor.ltas.ulg.ac.be
Alcal, J., The influence of plastic hardening on surface deformation modes around Vickers and spherical indents (2000) Acta Materialia, 48, pp. 3451-3464
