A Finite-Element Hardness Model for Analyzing 316L Stainless Steel/Ceramic Nanocomposites

Abstract

A new finite-element approach to calculating the hardness of nanocomposite materials based on a 316L stainless steel matrix and nanoceramic inclusions is presented. Two different ceramic inclusions, alumina and titania, are considered. The finite-element model is created on the basis of the spherical Brinell hardness contact model. A quarter of the 3D finite-element is used to model the contact between a spherical tungsten carbide indenter and nanocomposite materials. The effect of the elastic modulus and percentage of the ceramic inclusions on the hardness of the nanocomposites considered is investigated. The finite-element model is verified by comparing itsresults with experimental data. The comparison showed a good agreement for low-concentration compositions and a slight deviation for highly concentrated ones.

Effects of liquid lubricants on the surface characteristics of 3D-printed polylactic acid

“…This approach minimized the influence of printing defects on the anisotropic friction behavior while still capturing the relevant friction characteristics. The values in the literature were adopted as the values for the mechanical properties of each part, as listed in table 3 [45,46]. Figure 9 shows the contact pressure and sliding reaction force obtained from the friction simulation analysis according to the sliding direction of the laminated grain and polished surface of the 3D-printed PLA.…”