76c1e882ed260369c9a73f93475c49ca pmc_28773476.pdf 151ecb6e19a0ef80e938e1e2cedf2f4fe0c66611 pmc_28773476.pdf 1475732af8c129719bede013bdaac0f139628ee1d400cd2a48cfed02b2a33c7f pmc_28773476.pdf Title: The Influence of Pore Size on the Indentation Behavior of Metallic Nanoporous Materials: A Molecular Dynamics Study Subject: In general, the influence of pore size is not considered when determining the Young’s modulus of nanoporous materials. Here, we demonstrate that the pore size needs to be taken into account to properly assess the mechanical properties of these materials. Molecular dynamics simulations of spherical indentation experiments on single crystalline nanoporous Cu have been undertaken in systems with: (i) a constant degree of porosity and variable pore diameter; and (ii) a constant pore diameter and variable porosity degree. The classical Gibson and Ashby expression relating Young’s modulus with the relative density of the nanoporous metal is modified to include the influence of the pore size. The simulations reveal that, for a fixed porosity degree, the mechanical behavior of materials with smaller pores differs more significantly from the behavior of the bulk, fully dense counterpart. This effect is ascribed to the increase of the overall surface area as the pore size is reduced, together with the reduced coordination number of the atoms located at the pores edges. Keywords: elastic properties; molecular dynamics; spherical indentation; porous materials Author: Daniel Esqué-de los Ojos, Eva Pellicer and Jordi Sort Creator: LaTeX with hyperref package Producer: pdfTeX-1.40.15 CreationDate: Wed May 11 05:00:51 2016 CEST ModDate: Wed May 11 05:00:51 2016 CEST Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 8 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2809879 bytes Optimized: no PDF version: 1.5 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- SIOUHS+URWPalladioL-Ital Type 1 Custom yes yes no 43 0 ANDYJY+URWPalladioL-Bold Type 1 Custom yes yes no 44 0 PKLFMZ+URWPalladioL-Roma Type 1 Custom yes yes no 45 0 YOTXCC+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 50 0 PSVCDJ+TeX-matha8 Type 1 Builtin yes yes no 87 0 CWHWFR+TeX-matha10 Type 1 Builtin yes yes no 88 0 RHKOUO+TeX-mathx10 Type 1 Builtin yes 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