Side Pole Test - High Speed Impact - Explicit Dynamics - ANSYS Workbench

Semih Tinmaz

28 Dec, 2024 10:33 PM

Explicit dynamics is a time integration method used to perform dynamic simulations when speed is important. Explicit dynamics account for quickly changing conditions or discontinuous events, such as free falls, high-speed impacts, and applied loads. Because these “nonlinear dynamics” are integrated into the simulation, explicit dynamics is the preferred choice for simulating highly transient physical phenomena.

Some side impacts involve a vehicle travelling sideways into rigid roadside objects such as trees or poles. Often this is the result of a loss of control on the part of the driver, owing to speeding, misjudgement of a corner or because of a skid in slippery conditions.

1. Step 1: Overview

   

   
   

   
   

   
   

   
   

   
   

2. Step 2: Setup

   • Drag and Drop a Explicit Dynamics Analysis on ANSYS Workbench Main Menu:

   
   

   

3. Step 3: Engineering Data (Material Model)

   • Structural Steel (Default Material Model) has been selected as the material of Rigid Side Pole:

   
   

   

   
   

   • Non-Linear Aluminum Alloy Material Model has been used to simulate the crashing component as below:

   
   

   

4. Step 4: Geometry (Design Modeler)

   • The 3D Models have been created on internal module of ANSYS Workbench which is named as "DesignModeler":

   
   

   

   
   

   
   

   • The modeling parameters for Rigid Side Pole (Solid Body) could be seen below:

   
   

   

   

   

   

   
   

   
   

   • The modeling parameters for Crashing Component (Surface Body) could be seen below:

   
   

   

   

   

   

5. Step 5: Body Interactions

   • Frictionless Body Interaction has been created between Rigid Side Pole and Crashing Component:

   
   

   

   

   
   

   • The "Penalty" Formulation and "Discrete Surface" are considerably important for this tutorial:

   
   

   

6. Step 6: Meshing Operations (Default Geometry)

   • The default mesh operations with the "Linear" Element Order as 4.0mm Element Size have been implemented:

   
   

   

   
   

   

7. Step 7: Boundary Conditions

   • The Initial Conditions without ant Pre-Stress values have been implemented as below figure:

   
   

   

   
   

   
   

   • The velocity has been defined as below:

   
   

   

   

   
   

   
   

   • The Fixed Support has been implemented in order to simulate the Rigid Side Pole:

   
   

   

8. Step 8: Analysis Settings

   • Solver Options could be seen below:

   
   

   

9. Step 9: Results

   • Total Deformation:

   
   

   

   
   

   • Equivalent Stress:

   
   

   

   
   

   • Equivalent Plastic Strain: