応力集中による破壊現象のモデル化に関する研究(その3)

• Material Type: 文書・図像類
• Title: 応力集中による破壊現象のモデル化に関する研究(その3)
• Author/Editor: 鳥井原 誠; 丸山 誠; 鈴木 健一郎; 並木 和人
• Author Heading: 鳥井原 誠; 丸山 誠; 鈴木 健一郎; 並木 和人
• Publication Date: 2004-02
• Publication Date (W3CDTF): 2004-02
• Alternative Title: Modeling of failure phenomena in rocks induced by stress concentration(Phase 2)
• Periodical title: JNC TJ7400 2005-034
• Text Language Code: jpn
• Target Audience: 一般
• Note (General): 結晶質岩の脆性破壊現象を解明し、そのメカニズムをモデル化することは掘削損傷領域の物性評価において重要となる。しかしながら、岩盤の破壊や塑性化などの非弾性状態の岩盤物性を定量的に表現できる数値解析手法はほとんど現存しないのが実情である。そこで本研究では、応力集中による岩盤破壊や塑性化のメカニズムを明らかにし、その領域の岩盤物性を表現できる解析手法を開発することを目的とする。; Elucidation of the physichal process leading to brittle failure in crystalline rocks and modeling its mechanism is of fundamental importance in evaluating the mechanical and hydraulic properties of EDZ. In this study, Granitic rock columns and plates with circular opening were subjected to triaxial compression and tension tests and measured elastic wave velocity and resisitivity to analyze nucleation and growth of microcracks. The following conclusions were important to note that: (1)During 90\% to 100\% stress levels to failure stress, it appear that cracks grew on their size but no cracks were nucleated. (2)It was demonstrated that crack tensor F$_{ij}$ was closely related the second rank tensor V$_{ij}$ which was determined by measuring elastic wave velocity on at least six direction. (3)The applicability of numerical analysis model based on the micromechanics was introduced. This could be considered the mechanism of the damage growth (microcrack growth) and the interaction among microcracks. (4)On the experiment of Granitic rock plates with circular opening, the process leading to brittle failure and damage growth of the rock around the opening were observed with AE monitoring and so on. (5)In order to evaluate the variety of permeability with the damage growth, it was showed that permeability tensor in terms of crack tensor gave the permeability change in stress history.
• Source: /JNC-TJ7400-2005-034.PDF （fulltext）; https://jopss.jaea.go.jp/pdfdata/JNC-TJ7400-2005-034.PDF
• Access Restrictions: 限定公開
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 日本原子力研究開発機構 : JOPSS:JAEA Originated Papers Searching System

• Summary, etc.: 結晶質岩の脆性破壊現象を解明し、そのメカニズムをモデル化することは掘削損傷領域の物性評価において重要となる。しかしながら、岩盤の破壊や塑性化などの非弾性状態の岩盤物性を定量的に表現できる数値解析手法はほとんど現存しないのが実情である。そこで本研究では、応力集中による岩盤破壊や塑性化のメカニズムを明ら...