UTokyo Repository 東京大学

UTokyo Repository >
131 地震研究所 >
東京大学地震研究所彙報 >

このページ(論文)をリンクする場合は次のURLを使用してください: http://hdl.handle.net/2261/13188

タイトル: 摩擦熱を考慮した剪断変形のシミュレーション
その他のタイトル: Numerical Experiments of Shear Deformation with Frictional Heating
著者: 亀山, 真典
堀, 高峰
Cummins, Phil R.
平野, 聡
馬場, 俊孝
金田, 義行
著者(別言語): Kameyama, Masanori
Hori, Takane
Cummins, Phil R.
Hirano, Satoshi
Baba, Toshitaka
Kaneda, Yoshiyuki
キーワード: frictional heating
shear deformation
finite difference method
発行日: 2000年12月22日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第75冊第2号, 2000.12.22, pp. 127-143
抄録: We develop a thermal-mechanical model for describing the formation of shear zones. We consider shear deformation of a two-dimensional rectangular region composed of a viscous fluid under a constant velocity at the boundary. Viscosity of the material is assumed to depend only on temperature for simplicity. In order to enhance the shear deformation, we included a small inclusion whose viscosity differs from that of the surrounding material. We carried out time-marching simulations and monitored the evolution of temperature and strain around the inclusion. Our results show that the deformation localizes in a narrow region when sufficient heat is generated by viscous dissipation. In the zone of localized deformation, temperature increases by several hundred degrees owing to strong dissipative heating. We found that the zone of localized deformation develops in the region where the greatest heat is generated at the initial stage of evolution. The zone of localized deformation pierces the inclusion when the inclusion is weaker than the surrounding material, while it develops away from the inclusion when the inclusion is stiffer than the surrounding material. These findings, though qualitatively, suggest that heating by viscous dissipation may play an important role in the formation of decollements around subducted seamounts.
URI: http://hdl.handle.net/2261/13188
ISSN: 00408972


ファイル 記述 サイズフォーマット
ji0752002.pdf1.65 MBAdobe PDF見る/開く



Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - ご意見をお寄せください