岩盤力学基礎

[1511] 有限要素法を用いたシェブロンノッチを有するSCB試験片の応力拡大係数の解析

^〇Eqlima Mahdavi¹, Yuzo OBARA², Majid Reza Ayatollahi¹ (1.Iran University of Science and Technology, 2.Kumamoto University)

司会: 木崎 彰久 (秋田大)

キーワード：破壊靱性試験, SCB試験片, シェブロンノッチ, 有限要素法, 応力拡大係数

The　semi-circular bend (SCB) test is one of the tests to investigate the mode-I fracture toughness of rock and convenient for estimating it. The conventional SCB specimen has straight shaped notch.However, it is preferred to use of V shaped (or chevron) notch in SCB specimen, because of some technical difficulties associated with making a sharp crack or creating pre-crack to perform experimental tests. In this paper, the minimum dimensionless stress intensity factor of semi-circular bend specimen with chevron notch is calculated using finite element analysis with ABAQUS software. The result is then compared with analytical result obtained from slice synthesis method. Good agreement can be observed between two results.