Open AccessState of stress within a thin elastic wedge: a model of internal deformation of the continental plate at arc—arc junctions
Author(s) -
Kato Teruyuki,
Shimazaki Kunihiko,
Yamashina Ken'ichiro
Publication year - 1980
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1980.tb04814.x
Subject(s) - wedge (geometry) , arc (geometry) , geology , stress (linguistics) , shear stress , mechanics , geometry , shear (geology) , physics , mathematics , petrology , philosophy , linguistics
Summary. Anomalous stress distributions near arc—arc junctions have been found in several parts of the world. As a simple two‐dimensional model, a thin elastic wedge is introduced to model the continental side of the arc—arc junction, and the stress distribution within it is calculated to interpret those anomalies. Uniform normal and/or shear stress boundary conditions are given separately to each edge to approximate the effect of the two neighbouring converging plate boundaries; Stress components are obtained by numerical integration. Among the various results, the following features are predominant and seem to be actually taking place at arc—arc junctions. (1) The anomaly in stress pattern within the wedge is basically due to the difference in stress conditions between the two boundaries. (2) A large stress concentration takes place when symmetrical shear stresses are applied to the two edges.