Innovation of rock test combing micro bend test and multiscale fracture analysis

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K21584
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering; Computational science
• Research Institution: Kisarazu National College of Technology
• Principal Investigator: Ishii Tateki 木更津工業高等専門学校, 環境都市工学科, 准教授 (60400280)
• Research Collaborator: OBARA Yuzo 熊本大学, 自然科学研究科, 教授
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: マイクロ材料試験 / 破壊解析 / マルチスケール解析 / 不均質材料

Outline of Final Research Achievements

This study is a fundamental study aimed at a new development in the rock fracture mechanics. This study investigated microscopic deformation fracture characteristics of mineral grains making up rocks. Macroscopic fracture responses of rocks were then simulated by a newly developed fracture analysis method with these results. Specifically, micro bend tests evaluated the microscopic characteristics of the mineral grains in a granite and the fracture analyses simulated the microscopic fracture response of granite. From these results of simulations, we discussed the fracture mechanism of granite. Finally, we examined the macroscopic strength of granite derived from the microstructural properties and the fracture behaviors and clarified future problems in multiscale modeling.

Free Research Field

計算力学，岩盤工学