Preprints

Filtering by Subject: Mechanics of Materials

Dynamic Compressive Strength and Fragmentation in Sedimentary and Metamorphic Rocks

Auriol S. P. Rae, Thomas Kenkmann, Vivek Padmanabha, et al.

Published: 2021-08-15
Subjects: Mechanics of Materials, Tectonics and Structure

Brittle deformation at high strain rates results in intense fragmentation and rock pulverisation. For rocks, the critical strain rate at which this behaviour occurs is ~10^2 s-1. The mechanical properties of rocks at these strain rates can also be very different from their quasi-static properties. Deformation of rocks at these strain rates is uncommon in nature but can occur during fault rupture, [...]

Imbibition in porous media: correlations of displacement events with pore-throat geometry and the identification of a new type of pore snap-off

Kamaljit Singh, Tom Bultreys, Ali Q. Raeini, et al.

Published: 2019-08-23
Subjects: Chemical Engineering, Civil and Environmental Engineering, Complex Fluids, Dynamics and Dynamical Systems, Engineering, Engineering Science and Materials, Environmental Engineering, Materials Science and Engineering, Mechanics of Materials, Petroleum Engineering, Transport Phenomena

The displacement of a non-wetting fluid by a wetting fluid in porous media, called imbibition, is important in many natural and industrial processes. During imbibition, the wetting fluid invades the pore space through a series of competitions between piston-like displacement, film and corner flow, snap-off, pore bypassing and trapping. Our understanding of these fundamental pore-scale [...]

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