Performing Submodeling in Ansys Mechanical — Lesson 6

Submodeling, as the name suggests, is the modeling of a portion of the larger (global) model to capture the effects of refined mesh in a smaller model. This is done to avoid having the whole larger assembly meshed with fine elements.

We use coarse mesh in the global model, as the local features of the submodel do not have any impact on the overall response of the system. We then define a refined submodel with displacement (and temperature) results applied to the submodel. The most common utility of this approach is to refine a critical region or region of interest without solving for the whole model. Another important aspect is to study small changes like adding a fillet. With local design changes comes the parametrization of the design which is much easier in the smaller submodel. Apart from this, we can model localized non-linearity that might have not been captured in the global model.

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0:00 - Intro
1:20 – Introduction to Submodeling
2:37 – St. Venant’s Principle approach for Submodeling
3:01 – Advantages of the Submodeling Approach
6:24 – Creating a Local Coordinate System
6:59 – Defining a Remote Displacement Boundary Condition
8:45 – Changing the Upper and Lower Limits of the Legend Results
10:20 – Creating a Connection between Solution and Setup Model Cells
10:47 – Defining Mesh Size for a Body
11:33 – Creating a Named Selection
11:50 – Importing Cut Boundary Constraint into the analysis
12:35 – Turning On the Display Source Points
13:50 – Advantages of Submodeling