Assignment 3-2D Element Formulation Challenge

Aim:- 3-2D Element Formulation

Objective:-

Comparison of results with base simulation and improved shell element properties

1.Using the crash beam file from the previous assignment, change the run time to 55 ms.

2. Change the number of animation steps during simulation to a minimum of 25 and maximum of 60.

3. Run the base simulation without any modification to element properties.

4. At the end of the simulation, do the energy error and mass error checks and determine whether results would be acceptable.

5. If acceptable, Plot rigid wall forces, internal energy, hourglass energy, contact energy, total energy of the simulations.

6. Change all the shell elements properties to recommended properties, save this as separate, rad files and run the simulation.

7. Follow steps 5 and 6.

8. Create a brief report comparing all the results from steps 5 and 6 for both simulations.

9. Comment whether there is any change in the results and why there is any change in the result.

STEP-1:- Import the rad file in hyperworks.

• Imported given model.

• The element view is set to shaded elements view which displays in the below image.

STEP-2:- Modification of run time and plot frequency.

• The run time can be changed from 60 to 55 ms.

• Changing animation steps is to 55.
• To have 55 animation steps, the frequency should be run time/animation steps=55/55=1.

STEP-3:- In the property card every parameter property is by default shown in below image-

• Now run the simulation and write -nt 4.

• Click on RADIOSS button and it will show job is completed card.

• We can see the output of simulation open file 000.out.

STEP-4:- Open hyperview to see the animation result h3d file.

STEP-4:- Graph plotted for the various energy. Import T01 file in hypergraph.

CASE-2:- Assign the recommended parameters in the property card.

• After assigning the properties run the simulation.

• Plotted the graph for various energy. import file T01 in hyperview.

CONCLUSION:-

We have performed a basic crash simulation using radioss solver and hyperview.Finally seeing the energy plots of both simulations we can conclude that elements formulation Q24 gives better result and stabilize the hourglass energy.