Triaxial shearing of sands using X-ray CT imaging and FEM

Triaxial shearing of an assembly of sand grains is numerically simulated using X-ray CT imaging and FEM concurrently. The actual morphology of particles, geometric contacts, and arrangement of solid, void phases are captured using X-ray CT imaging. A novel framework is introduced wherein a realistic assembly of sand grains is discretized using shell-based finite elements to solve the boundary value problem. The shell elements are based on Mindlin-Reissner flexural theory and corotational velocity strain formulation which are well suited for problems involving large rotation. This approach is computationally less expensive compared to the finite discrete element approach where sand grains are discretized using solid finite elements. The latex membrane is modeled as hyper-elastic material to provide a flexible boundary condition for applying confining pressure.

Credits: Thakur, Mohmad Mohsin, and Dayakar Penumadu. “Triaxial compression in sands using FDEM and micro-X-ray computed tomography.” Computers and Geotechnics 124 (2020): 103638. 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: