Challenge

Week - 3 Drop test Challenge

AIM :

     To create a complete simulation file using Input Parameters from this to perform a drop test and Plot the Output results.

OBJECTIVE :

     --> Input Parameters required for the simulation are listed below,

                         - Title Card,

                         - Section,

                         - Material Card,

                         - Part,

                         - Initial Velocity,

                         - Boundary Conditions,

                         - Contact,

                         - Control Card

       --> Plot the Ouptut results such as Vonmises Stress & Energy Plots.

PROCEDURE :

     1. Import the given Model in LS-PrePost using File-->Open-->LS-DYNA Keyword File option.

                

                                            Fig: Imported Model

        2. After Importing a Model, Set the Input Parameters using Model-->Keyword Manager option.

                       

                                                 Fig: Keyword Manager

Title :

          3. Create a Suitable Title for the simulation by using Keyword Manager-->Model-->Title option,

                   

                                                                     Fig: Creating a Title

Section :

          4. Create a Section for Bottom Plate(Shell) and Phone(Solid) part.

          5. Go to Keyword Manager-->All-->Section-->Shell option,

                     

                                                       Fig: Section for Bottom Plate (Shell)

               6. Go to Keyword Manager-->All-->Section-->Solid option,

                      

                                                       Fig: Section for Phone (Solid)

Material :

             7. Create a Material for Bottom Plate and Phone.

             8. Go to Keyword Manager-->All-->MAT-->020-Rigid option,

                      

                                                              Fig: Creating Rigid Material

             9. Go to Keyword Manager-->All-->MAT-->024-Piecewise Linear Elasticity option,

                      

                                                                  Fig: Creating Piecewise Linear Elasticity Material

Part :

            10. Create a Part by using Keyword Manager-->Model-->PART option and assign the Section ID & Material ID,

                       

                                                                       Fig: Creating a Part for Plate & Phone

Initial Velocity :

         11. Create an Initial Velocity for Phone by using Keyword Manager-->All-->INITIAL-->Velocity option,

                      

                                                                     Fig: Creating Initial Velocity

                       

                                                          Fig: Velocity towards Z-direction (negative)

Boundary Conditions :

       12. Create a Boundary Conditions using Keyword Manager-->All-->Boundary-->SPC_SET option,

                       

                                                       Fig: Creating Boundary Conditions

Contact :

       13. Create a Contact using Keyword Manager-->All-->Control option,

                     

                                                            Fig: Creating a Contact for Plate & Phone

Control :

            14. Create a Control card using Keyword Manager-->All-->Control-->Termination option,

                     

                                                                        Fig: Creating Control Card

Output Requests :

            15. Create an Output request to obtained plot results from the drop test simulation.

            16. Go to Keyword Manager-->All-->Database-->Binary_D3Plot option and set the time step(Dt),

                     

                                                 Fig: Time Step for getting output Plot results

              17. Go to Keyword Manager-->All-->Database-->ASCII_option and Select GLSTAT option and set Dt value to get Energy plot results,

                    

                                                            Fig: Time Step for getting Energy Plot results

Model Check :

         18. Finally, Check the Model for Errors and Warnings using Keyword Manager-->Model Check option,

                   

                                              Fig: Model Checking

        19. After Model Checking, Run the Simulation using File-->Run LS-DYNA option,

        20. In the LS-RUN window, import the keyword file and Run the simulation.

                   

                                                                  Fig: LS-Run Window

OUTPUT RESULTS :

         21. Finally Simulation finished by Normal Termination and Output results has been displayed below,

                   

                                                         Fig: Output Result

Von mises Stress Plot :

        22. Open the Binary file using File-->Open-->LS-DYNA Binary Plot option,

        23. Go to Post-->FriComp-->Vonmises Stress option to get maximum stress plot.

                   

                                                                       Fig: Vonmises Stress Plot

        24. From the above contour plot obtained that, Maximum Stress is 9.228e-02 at the time of 5.0003 sec

Energy Plot :

        25. To get Energy Plot, Go to Post-->ASCII option and load glstat, and display the energy plots.

                   

                                                      Fig: Energy Plot

CONCLUSION :

         Mobile Phone Drop test Simulation is Completed by using required Input Parameters and obtained the Output results such as Vonmises Stress & Energy Plot results.

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