qing.peng's blog

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.

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.

Dear Colleagues,