TIME DEPENDENT FRACTURE GROWTH IN INTACT CRYSTALLINE ROCK:LABORATORY PROCEDURES AND RESULTS

摘要：

This contribution summarises an extensive laboratory campaign that provides reference data for a numerical modelling study simulating time-dependent behaviour of saturated Aspo diorite in form of triaxial creep experiments and the development of new experimental methods to simply and economically determine the Mode I and Mode II subcritical crack growth parameters, n and A. From constant rate and constant load experiments on specimen populations the parameters are determined by a statistical method. The experimental set-ups are modified versions of methods to determine Mode I and Mode II fracture toughness, i.e. the notched three-point bending and Punch-Through Shear test. The laboratory campaign exhibits for Mode I conditions n=48 and -logA=24, for Mode II conditions n=94 and -logA=65.

作者: Tobias Backers Juha Antikainen Mikael Rinne

作者单位: GeoFrames GmbH, Potsdam, Germany Helsinki University of Technology, Finland Fracom Oy, Kyrkslatt, Finland

会议类型: 国际会议

会议名称: 第二届国际应力-水流-热-化学耦合学术大会(2nd International Conference on Coupled Thermo-Hydro-Mechanical Processes in Geosystems and Engineering：Geoproc2006)

会议地点: 南京

会议语种:英文

页码: 337-342

在线出版日期: 2006-05-22（万方平台首次上网日期，不代表论文的发表时间）