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| − | Title:
| + | ==+ Christoph Ortner visit, Jan 31, 2011=== |
| − | Consistency of atomistic/continuum coupling methods for crystalline solids
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| − | Abstract:
| + | ! Time !! Meeting !! Location !! Contact Info |
| − | Low energy equilibria of crystalline materials are typically characterised by localized defects that interact with their environment through long-range elastic fields. By coupling atomistic models of the defects with continuum models for the elastic far field one can, in principle, obtain models with near-atomistic accuracy at significantly reduced computational cost. However, several pitfalls need to be overcome to find a reliable coupling mechanism. Possibly the most widely discussed among these pitfalls are the so-called “ghost forces” that typically arise in energy-based atomistic/continuum coupling mechanisms.
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| − | In this talk I will first describe the construction and of energy-based atomistic/continuum coupling methods, how ghost forces arise, and how one can avoid them. I will then explain the resulting model errors due to different types of interface treatment. I will try to answer the question whether absence of ghost forces automatically implies "high accuracy" of the coupling scheme.
| + | |9-9:45 ||? || place || phone/email |
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| | + | |10-10:45 ||? || place || phone/email |
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| | + | |11:00-11:45 || ? || ? ||phone/email |
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| | + | |11:00-11:45 || Lunch with || Faculty Club ||tbd |
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| | + | |1:30-2:00 || ? || Durand ? || phone/email |
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| | + | |2:00-2:45 ||tbd || Durand ||tbd |
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| | + | |3:00-3:45 || ? || ? || |
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| | + | |3:45-4:15|| Seminar Prep || || |
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| | + | |4:15 || Seminar || TBD || |
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| | + | |6:15 || Dinner with ... || TBD || |
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