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Goals: • Understand and predict unique plasticity phenomena at nano and submicron scales

NANOMESO: A NSF-EC Cooperative Activity on Nano/Meso Scale Effects on Crystal Plasticity Peter M. Anderson and Ju Li, Ohio State Univ. DMR 0502711 William D. Nix, Stanford University, DMR 0502208. NANOMESO Web Site: http://www.mse.osu.edu/~andersonp/nanomeso.html. Goals:

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Goals: • Understand and predict unique plasticity phenomena at nano and submicron scales

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  1. NANOMESO:A NSF-EC Cooperative Activity onNano/Meso Scale Effects on Crystal PlasticityPeter M. Anderson and Ju Li, Ohio State Univ. DMR 0502711William D. Nix, Stanford University, DMR 0502208 NANOMESO Web Site: http://www.mse.osu.edu/~andersonp/nanomeso.html Goals: • Understand and predict unique plasticity phenomena at nano and submicron scales • Offer unique educational experience to 3 US PhD students: joint expertise of 7 PIs in US, Germany, Switzerland, Netherlands.

  2. 1000 Diam=290nm 310nm Compressive stress (MPa) 500 400nm 420nm Bulk strength 0 0 0.1 0.2 0.3 0.4 compressive strain Techniques: Molecular Dynamics PeierlsMethod DislocationDynamics NovelTesting Ab initio Highlights: Novel Testing: smaller is stronger!Basis: Compressive test results (below) of single crystal gold <001> pillars Molecular Dynamics: Quantized Plasticity! Basis: MD studies, Paul Scherrer Institute (Switzerland) New Finite Element Approach: Quantized Crystal Plasticity (QCP) Result showing percolation of plastic slip in nc Ni Anderson & Li (Ohio State);Van Swygenhoven, Bitzek (Paul Scherrer Institute) Nix et al, Stanford (Diam = pillar diameter)

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