u‐p semi‐Lagrangian reproducing kernel formulation for landslide modeling
Abstract
This paper presents a u‐p (displacement‐pressure) semi‐Lagrangian reproducing kernel (RK) formulation to effectively analyze landslide processes. The semi‐Lagrangian RK approximation is constructed based on Lagrangian discretization points with fixed kernel supports in the current configuration. As a result, it tracks state variables at discretization points while allowing extreme deformation and material separation that is beyond the capability of Lagrangian formulations. The u‐p formulation following Biot theory is incorporated into the formulation to describe poromechanics of saturated geomaterials. In addition, a stabilized nodal integration method to ensure stability of the domain integration and kernel contact algorithms to model contact between bodies are introduced in the u‐p semi‐Lagrangian RK formulation. The proposed method is verified with several numerical examples and validated with an experimental result and the field data of an actual landslide.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 14, 2017
- Source ID
- 10.1002/nag.2722
Entities
People
- Ashkan Mahdavi
- Craig Foster
- Sheng‐Wei Chi
- Thanakorn Siriaksorn
Organizations
- United States Army Corps of Engineers
- University of Illinois at Chicago