Numerical simulations of hypervelocity impact of asteroid/comet on the Earth

T. Saito, Kunio Kaiho, A. Abe, M. Katayama, K. Takayama

研究成果: Article査読

6 被引用数 (Scopus)

抄録

In this study, numerical simulations of asteroid/comet impact on the earth were carried out by using the hydrocode AUTODYN-2D (Century Dynamics Inc.). The ejected mass into the atmosphere originated from different sources was recorded at different altitudes as a function of time. It is claimed that the mass extinction at the Permian-Triassic (P/T) boundary was caused by an extraterrestrial impact and the following abrupt climate/environment change. The objective of this work is to substantiate the claim with numerical analysis. It is demonstrated that the materials from different origins are splashed into the atmosphere and that the crater size is a function of the diameter as well as the kinetic energy of the impactor. The effect of impact angle to the appearance of ejected materials is also investigated using two-dimensional plane strain model.

本文言語English
ページ(範囲)713-722
ページ数10
ジャーナルInternational Journal of Impact Engineering
33
1-12
DOI
出版ステータスPublished - 2006 12 1

ASJC Scopus subject areas

  • 土木構造工学
  • 自動車工学
  • 航空宇宙工学
  • 安全性、リスク、信頼性、品質管理
  • 海洋工学
  • 材料力学
  • 機械工学

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