Scaling Equation for yield strength of nanoporous open-cell foams

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A comprehensive study on the relationship between yield strength, relative density and ligament sizes is presented for nanoporous Au foams. Depth-sensing nanoindentation tests were performed on nanoporous foams ranging from 20 to 42% relative density with ligament sizes ranging from 10 to 900 nm. The Gibson and Ashby yield strength equation for open-cell macro-cellular foams is modified in order to incorporate ligament size effects. This study demonstrates that at the nanoscale, foam strength is governed by ligament size, in addition to relative density. Furthermore, we present the ligament length scale as a new parameter to tailor foam properties and achieve ... continued below

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PDF-file: 24 pages; size: 1.4 Mbytes

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Hodge, A M; Biener, J; Hayes, J R; Bythrow, P M; A.Volkert, C & Hamza, A V May 25, 2006.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 34 times , with 12 in the last month . More information about this article can be viewed below.

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A comprehensive study on the relationship between yield strength, relative density and ligament sizes is presented for nanoporous Au foams. Depth-sensing nanoindentation tests were performed on nanoporous foams ranging from 20 to 42% relative density with ligament sizes ranging from 10 to 900 nm. The Gibson and Ashby yield strength equation for open-cell macro-cellular foams is modified in order to incorporate ligament size effects. This study demonstrates that at the nanoscale, foam strength is governed by ligament size, in addition to relative density. Furthermore, we present the ligament length scale as a new parameter to tailor foam properties and achieve high strength at low densities.

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PDF-file: 24 pages; size: 1.4 Mbytes

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  • Journal Name: Acta Materialia, vol. 55, N/A, February 1, 2007, pp. 1343-13449; Journal Volume: 55

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  • Report No.: UCRL-JRNL-221840
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 902340
  • Archival Resource Key: ark:/67531/metadc882606

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 25, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 1, 2016, 6:41 p.m.

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Hodge, A M; Biener, J; Hayes, J R; Bythrow, P M; A.Volkert, C & Hamza, A V. Scaling Equation for yield strength of nanoporous open-cell foams, article, May 25, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc882606/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.