Modelling the micro-physics underlying earthquake nucleation processes and rupture
Convenors: D. Place (Australia), Yilong Bai (China)
Session Overview: David Place, QUAKES (15 minutes)
Modelling microscopic properties of rock allows simulation of non-linear and complex macroscopic behaviour. Rather than specifying a "true" representation of rock at a microscopic scale, models use empirical properties at a mesoscopic scale such that the correct macroscopic behaviour is simulated. The objectives of session 1.1 are:
1. Modelling rock grain interactions:
Different properties can be modelled at a grain scale such as elasticity, roughness, friction, thermal effect and phase transitions. However, emergent properties of a model can be used to specify the material properties. For instance rather than specifying a roughness at the grain scale, an assembly of smaller grains can be used.
2. Modelling rupture processes:
In the process of fracture, grain of rocks can break down until a lower scale is reached, this may by microns to the scale of molecules. Cracks and a complex structures are present on many scales. The disorder present at a microscopic scale can be significant at a larger scale.
Session Plenary: (1 Hour)
David Place, QUAKES (30 minutes) Modelling rock grain interactions at a meso-scale to study the micro and macro-physics of rocks: simplicity vs. complexity Yilong Bai, LNM (30 minutes) Damage Localization as Possible Mechanism Underlying Earthquake
Detailed Session: (2.5 Hours)
KeYin Peng, XiangChu Yin, HaiTao Wang, and YongXian Zhang (15 mins) (Joint with 3.2) An experimental investigation and numerical simulation of the damage process of rock specimens Steffen Abe, Peter Mora and David Place (15 mins) Modelling thermal effects on the nucleation process Hide Sakaguchi and Hans Muhlhaus (Joint with 3.2) (15 mins) Hybrid Modelling of Coupled Pore Fluid-Solid Deformation Problems F.J. Ke ,M. F. Xie and Y. L. Bai (Joint with 5.1) (15 mins) Evolution Induced Catastrophe of Material Failure Discussion and comments (90 mins)