MultiCBPR – FWF Lise Meitner project
Compaction bands in porous rocks are tabular zones with concentrated compaction and the ensuing reduction of permeability play an important role in geophysical and geo-engineering applications. Some laboratory experiments on field samples were carried out, which confirmed principally the formation and propagation of compaction bands under compressive stress. However, some discrepancies between filed observations and laboratory experiments come to light. Moreover, occurrence of compaction band is found to depend not only on porosity and pressure, but also on stress state and loading history. A further issue is the hidden link between microscopic property and macroscopic behavior. Numerical models may help bridge the gap between laboratory tests and field observations, and bring the hidden micro-macro relationships to light. The main objective of this project is revealing the multiscale localized failure mechanism of compaction bands in porous rocks, which includes: (1) Enhancement of hypoplastic constitutive model with fabric tensor evolution equation. (2) Development of the hypoplastic peridynamic model for modelling the inception and propagation of compaction bands in porous rocks. (3) Building a hierarchical multiscale computational framework accelerated by CPU-GPU heterogeneous computing architecture to shed light on the multiscale localized failure mechanism of compaction bands in porous rocks.
For more information, please visit the website of the MultiCBPR project.