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The normal-auxeticity mechanical phase transition in graphene

When a solid object is stretched, in general, it shrinks transversely. However, the abnormal ones are auxetic, which exhibit lateral expansion, or negative Poisson ratio. While graphene is a paradigm 2D material, surprisingly, graphene converts from normal to auxetic at certain strains. Here, we show via molecular dynamics simulations that the normal-auxeticity mechanical phase transition only occurs in uniaxial tension along the armchair direction or the nearest neighbor direction. Such a characteristic persists at temperatures up to 2400 K.

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Call for abstract: USNCCM13 MS304: Concurrent Multi-Length Scale Modeling: from Finite Elements to Atoms and Electrons

We cordially invite you to participate in the United States Association for Computational Mechanics (USACM)'s 13thU.S. National Congress on Computational Mechanics (USNCCM13) by giving a talk in our minisymposium entitled Multiscale Concurrent Multi-length scale modeling: from Finite Elements to Atoms and Electrons. The Congress will be held in San Diego, California, at the Manchester Grand Hyatt, July 26-30, 2015.

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USNCCM12 MS4.9: Concurrent Multi-Length Scale Modeling: from Finite Elements to Atoms and Electrons (call for abstract)

We cordially invite you to participate in the 12th U.S. National Congress on Computational Mechanics (US-NCCM12) and give a talk in our minisymposium (MS4.9) entitled "Multiscale Concurrent Multi-Length Scale Modeling: from Finite Element to Atoms and Electrons". The Congress will be held in Raleigh, NC, USA, from July 22 to July 25, 2013.

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