Modeling the influence of roughness on nanoindentation data using finite element analysis

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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CAMPBELL A.C. BURŠÍKOVÁ Vilma MARTINEK J. KLAPETEK P.

Rok publikování 2019
Druh Článek v odborném periodiku
Časopis / Zdroj INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://www.sciencedirect.com/science/article/pii/S0020740319311634
Doi http://dx.doi.org/10.1016/j.ijmecsci.2019.105015
Klíčová slova Finite element method; Roughness; Nanoindentation
Popis Nanoindentation is a popular tool for the study of hardness and elasticity of materials at the nanoscale. However, the roughness of such samples may violate the basic assumptions under which these parameters can be evaluated. In this article we study the effects of roughness on the reduced modulus of contact. A systematic study using 3D FEA modeling to map the apparent modulus on a real rough surface as measured by AFM is presented. The requirements for the assessment of 2D modulus maps are compared to the requirements for the assessment of the average value and found to be much higher, approx. by a factor of ten. The possibility to use a simplified Hertzian model based on the local curvature is explored and found to give acceptable results, at least from a qualitative point of view.
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