Week - 3 Drop test Challenge

Objective:

Drop test Challenge – Create the input key file for the given mesh file to perform the drop test simulation and analyze the results.

Procedure:

1. Open the given meshed input key file (Drop_Test_onlymesh.k) in LS – Dyna Pre Post.

2. In Create Entity, select node by area to create the NSID (Node set) – Selecting the nodes of the floor and constraint it in all DOF. Before this, delete all Shell elements from the model using the Delete in Model part.

3. Create a Solid card in the Section keyword.

4. Assign Material properties using MAT keyword: a) 20_Rigid – Floor (MID, Title, E, PR)

b) 24_MAT_PIECEWISE_LINEAR_PLASATICITY (Phone - Aluminium)

5. Create Part & assign Solid ID and MAT ID we created for the components.

6. Create New SET ID (Node) to assign Initial Velocity (Initial Keyword) for the phone.

7. Create Contact keyword for the Surface to Surface for Phone as Slave and Floor as Master

8. Create Control Termination keyword for the total simulation time.

9. Create Binary D3 plot in Database keyword for the timestep.

10. Add the required ASCII files in the Database Keyword.

11. Change the Title in the TITLE keyword.

12. Final Model Image:

Now Save the keyword file in a separate folder.

13. Open LS- Run – Run the keyword file in the INPUT

14. Open LS – PrePost, Import the D3 plot file created during the simulation

15. In the Fringe Component option, Select Von-mises stress for the contour plot.

16. In XY Plot, Plot the Kinetic Energy, Internal Energy & Total Energy.

17. In ASCII, after loading the sleout file we can plot the Contact force between the floor and phone.

18. In the Matsum file, we can set the Internal, Kinetic, and hourglass energy for the phone.

Conclusion:

In this assignment, I learned to build a basic keyword file from scratch to perform the simulation.