Nano-indentation system for studying the influence of rock micro-scale properties and material heterogeneity on brittle failure processes in rock

用于研究岩石微观特性和材料非均质性对岩石脆性破坏过程影响的纳米压痕系统

• 批准号: 440436-2013
• 负责人: Grasselli, Giovanni
• 金额: $ 10.91万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=508891
• 关键词: Nano; indentation; system; studying; influence

This proposal requests funds that will be used to purchase a combined microindentation and microscratch testing system that is critical to the successful development of the applicant's research program, whose excellence was recognized in the last year competition with a DAS award. The applicant's proposed research aims to develop innovative understanding of the influence of micro-mechanical and micro-geometrical properties of geomaterials on observed failure processes. This research will characterize geometarials at the micro-scale using grid microindentation technique and microscratch test technique, which provide elastic properties and fracture toughness of constituent rock phases and phase interfaces, respectively. The data produced using the requested system, complemented with standard rock mechanics laboratory tests and non destructive measurements (x-ray microCT scans), will be adopted as input for the numerical and mathematical models developed by the applicant. It is anticipated that the resulting micromechanically constrained models will be then used to evaluate the safety and long-term viability for carbon sequestration processes in Canada, for developing safer geomechanical designs in mining, and for assessing the safety of potential sites for deep underground nuclear waste repositories.

该提案请求资金用于购买微压痕和微划痕组合测试系统，该系统对于申请人研究项目的成功开发至关重要，该系统的卓越表现在去年的竞赛中获得了 DAS 奖的认可。申请人提出的研究旨在发展对岩土材料的微观机械和微观几何特性对观察到的破坏过程的影响的创新理解。本研究将利用网格微压痕技术和微划痕测试技术在微观尺度上表征几何结构，分别提供岩石成分相和相界面的弹性特性和断裂韧性。使用所请求的系统产生的数据，辅以标准岩石力学实验室测试和无损测量（X射线显微CT扫描），将被采用作为申请人开发的数值和数学模型的输入。预计所得的微机械约束模型将用于评估加拿大碳封存过程的安全性和长期可行性，用于开发更安全的采矿地质力学设计，以及评估深层地下核废料储存库潜在地点的安全性。