Fabrication and characterization of microscale sandwich beams

Francisco Arias, Paul J.A. Kenis, Bing Xu, Tao Deng, Olivier J.A. Schueller, George M. Whitesides, Yuki Sugimura, Anthony G. Evans

Research output: Contribution to journalArticlepeer-review


Microscale sandwich beams with cell diameters and wall widths down to 150 and 15 μm, respectively, and having both metallic and polymer/metal cores were produced through fabrication methods that combined photolithography and electrodeposition. Various core structures were used, including some with negative Poisson's ratio. The bending response was investigated and compared with beam-theory predictions. Most of the cores evaluated had sufficient shear stiffness that the bending compliance was relatively high and dominated by the face sheets. Two of the core configurations were "soft" and exhibited behavior governed by core shear. The relative dimensions of the cores evaluated in this study were far from those that minimize the weight, because of fabrication constraints. The development of an ability to make high-aspect ratio cores is an essential next step toward producing structurally efficient, lightweight microscale beams and panels.

Original languageEnglish (US)
Pages (from-to)597-605
Number of pages9
JournalJournal of Materials Research
Issue number2
StatePublished - Feb 2001
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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