Micromechanical Analysis of Complex Structures by Nanoindentation

Abstract:

Civil engineers like to use complex construction systems which resist mechanical strain well. Complex material and structural arrangement is possible to see in biological materials as wood but as bone or dentin too. This paper deals with a property trend of biological material, dentin, and can serve as an inspiration for designing resistant constructions. The analysis was carried out by a method of nanoindentation. The differences of property values depending on location of indents in dentin structure were surveyed. Especially, the differences of hardness and reduced modulus were important. The huge number of indents was made during the experiment. The indents were divided into categories according to the distance from the nearest material interface. The upward trend was found out for both observed properties. The category which was the closest to the material interface showed the average value of hardness ~ 965 MPa, whereas the furthest ~ 1222 MPa. It was growth more than 20%. Reduced modulus showed similar trend. These results are different from these which have been performed by other authors so far.

• Periodical: Key Engineering Materials (Volume 731)
• Pages: 60-65
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.731.60
• Online since: March 2017
• Authors: Petra Hájková, Aleš Jíra*
• Keywords: Dentin, Hardness, Material Interface, Nanoindentation, Reduced Modulus

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