A grain based modeling study of fracture branching during compression tests in granites

作者：Hofmann Hannes; Babadagli Tayfun^*; Zimmermann Guenter

来源：International Journal of Rock Mechanics and Mining Sciences, 2015, 77: 152-162.

DOI：10.1016/j.ijrmms.2015.04.008

• Discrete element modeling (DEM)
• Grain Based Modeling (Gbm)
• Compression tests
• Granites
• Complex fracture development
• Fracture branching

In a previous study we used a the grain based modeling approach (GBM) to carry out a sensitivity analysis of mineral size and random distribution of minerals and particles and their influence on elastic properties, strength and fracture types in Aue Granite. In the present study, the same calibrated model is used to further evaluate the influence of these parameters as well as the particle, parallel-bond, and smooth joints properties of the model On the resulting fracture patterns. It was found that complex crack networks always develop in heterogeneous GBMs, and crack network complexity increases with increasing heterogeneity. While each of the particles, parallel bond, and smooth joint properties govern the development of a specific crack type, no obvious relations between these properties and the total number of cracks and the resulting crack network complexity were found.

• 出版日期2015-7