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  1. B100 理学部/理学研究科
  2. B100d 学位論文
  3. 博士論文(理博・論理博)

SPHERICAL SHELL TECTONICS : ON THE BUCKLING OF THE LITHOSPHERE AT SUBDUCTION ZONES 球殻テクトニクス : リソスフェアの沈み込みにおける座屈現象について

http://hdl.handle.net/2237/12518
http://hdl.handle.net/2237/12518
7fdcf216-773c-4a89-bda4-439e3f94fabb
名前 / ファイル ライセンス アクション
ko1831_abstr.pdf ko1831_abstr.pdf (327.9 kB)
ko1831.pdf ko1831.pdf (2.7 MB)
Item type 学位論文 / Thesis or Dissertation(1)
公開日 2009-12-22
タイトル
タイトル SPHERICAL SHELL TECTONICS : ON THE BUCKLING OF THE LITHOSPHERE AT SUBDUCTION ZONES 球殻テクトニクス : リソスフェアの沈み込みにおける座屈現象について
言語 en
著者 山岡, 耕春

× 山岡, 耕春

WEKO 32181

ja 山岡, 耕春

Search repository
Yamaoka, Koshun

× Yamaoka, Koshun

WEKO 32182

en Yamaoka, Koshun

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 The buckling phenomena of the subducting lithosphere due to the sphericity or the earth are studied by a nonlinear finite element method, and the results are compared with the buckling experiments by Yamaoka et a1. (1986b). The subduction or the lithosphere is modeled by a hemispherical shell squeezed at its circumferential edge. For simplicity, two parameters are employed in scaling the subducting lithosphere. One is the thickness or the lithosphere and the other is the length or its deformable portion (i.e. , the length of the descending slab). Uniform inward load is applied to the free circumferential edge or the deformable portion. At the opposite edge (i.e., at the trench), built-in boundary condition is imposed; no displacements and no rotations are allowed. Investigations are made mainly on the following three subjects: (I) How do the two parameters control the wavelength of buckling? The results show that shorter waves are associated with thinner and shorter shells. The irregularities such as tears or seamounts do not alter the buckling wavelength very much. (2) How do shells deform in their postbuckling state. Sharp cusps pointing outward appear in the postbuckling undulation without any irregularities in shell property and in applied load・The shape or the cuspidal undulation is quite similar t.o that of the actual subducting lithosphere. (3) Can buckling take place in the subducting lithospbere under likely conditions in the earth? The examination is made with respect to the buckling load, the shell deflection, and the buckling wavelength. The results strongly suggest that the arcuate shapes of subduction zones are in fact generated by buckling or the subducting lithosphere.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 名古屋大学博士学位論文 学位の種類 : 理学博士(課程) 学位授与年月日 : 昭和61年3月25日
言語 ja
内容記述タイプ Other
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_db06
タイプ doctoral thesis
書誌情報
発行日 1986-03-25
学位名
言語 ja
学位名 理学博士
学位授与機関
学位授与機関識別子Scheme kakenhi
学位授与機関識別子 13901
言語 ja
学位授与機関名 名古屋大学
言語 en
学位授与機関名 Nagoya University
学位授与年度
学位授与年度 1985
学位授与年月日
学位授与年月日 1986-03-25
学位授与番号
学位授与番号 甲第1831号
フォーマット
application/pdf
フォーマット
application/pdf
著者版フラグ
値 publisher
URI
識別子 http://hdl.handle.net/2237/12518
識別子タイプ HDL
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