• Corpus ID: 119247112

Shear softening of Earth's inner core indicated by its high Poisson's ratio and elastic anisotropy

@article{Wu2016ShearSO,
  title={Shear softening of Earth's inner core indicated by its high Poisson's ratio and elastic anisotropy},
  author={Zhongqing Wu},
  journal={arXiv: Geophysics},
  year={2016}
}
  • Zhongqing Wu
  • Published 1 November 2016
  • Geology, Physics
  • arXiv: Geophysics
Earth's inner core exhibits an unusually high Poisson's ratio and noticeable elastic anisotropy. The mechanisms responsible for these features are critical for understanding the evolution of the Earth but remain unclear. This study indicates that once the correct formula for the shear modulus is used, shear softening can simultaneously explain the high Poisson's ratio and strong anisotropy of the inner core. Body-centred-cubic (bcc) iron shows shear instability at the pressures found in the…