Hello,

I would like to seek clarification regarding the initialization of in-situ (geostatic) stresses in an Abaqus Coupled Eulerian–Lagrangian (CEL) analysis.

In my model, the soil slope is represented as a Lagrangian body embedded within an Eulerian domain, where the grey-colored region corresponds to the sloping ground. I have observed that the built-in geostatic stress procedure does not function reliably in Abaqus/Explicit for CEL analyses, particularly for sloping geometries.

To address this limitation, I am considering the following workflow:

1. Perform a geostatic stress analysis in Abaqus/Standard for the slope geometry only, modeled as a purely Lagrangian body.
2. Extract the resulting in-situ stress field from the Abaqus/Standard analysis.
3. Transfer or map these stresses into the CEL model in Abaqus/Explicit, such that the slope starts from a realistic initial stress state.
4. Use this initialized stress field as the starting condition for subsequent analyses, including deformation, strength reduction (factor of safety).

My questions are:

• Is it technically feasible to transfer geostatic stresses from an Abaqus/Standard analysis into a CEL analysis in Abaqus/Explicit?
• If so, what is the recommended and consistent approach to perform this stress mapping while ensuring equilibrium and numerical stability?
• Are there any limitations or best practices that should be considered when using stresses generated in a Lagrangian framework as initial conditions in a CEL formulation?

Any guidance on the feasibility, methodology, or known limitations of this approach would be greatly appreciated.