Drucker-Prager弾塑性体のモード2型き裂先端近傍特異場の漸近解析

フォーマット:

論文

責任表示:

新保, 泰輝 ; 矢富, 盟祥

言語:

日本語

出版情報:

日本材料学会, 2008-09-01

著者名:

• 新保, 泰輝
• 矢富, 盟祥

掲載情報:

材料 = Journal of the Society of Materials Science, Japan

ISSN:

0514-5163      

巻:

57

通号:

9

開始ページ:

936

終了ページ:

943

バージョン:

publisher

概要:

金沢大学理工研究域環境デザイン学系<br />In the geomechanical studies the mechanism of the shear failure for the Mode II crack extension is still an open problem. As the basic research, the purpose of this paper is, therefore, to obtain the Mode II sin … gular fields near a crack tip. The geomaterials, in general, have a pressure sensitive yield function to yield a dilatant effect. Thus, assuming a proportional loading, we obtain the asymptotic stress and displacement fields for the Mode II crack in the linear hardening Drucker-Prager elastic-plastic material. For the Mode II crack of the Drucker-Prager material, the boundary conditions can not be given on the extension of the crack surface, since the informations of the boundary are unknown : This is due to the loss of symmetry or asymmetry of the displacements and the stresses because of the existence of a parameter of the dilatant effect. Then the boundary conditions for the Mode II crack are given on the crack surfaces ; that is, the jumps of the normal displacement, the normal stress, and the shear stress vanish. As a result, a very small normal stress appears on the crack surfaces. We finally examine the angular distribution of the displacement and stress fields which depend on the hardening parameter and the pressure sensitivity parameter. 続きを見る

URL:

http://hdl.handle.net/2297/14285