Assignment 4

Case 1. : Run the model as it is. Name it Law2_epsmax_failure

Case 2. : In /FAIL/JOHNSON, change Ifail_sh = 1, Dadv = 1 & Ixfem =1. Run the model as Law2_epsmax_crack

Case 3. : Delete/Fail/JOHNSON card. Run the model as Law2_epsmax_nofail.

Case 4. : Delete the value of EPS_p_max & run the model with name Law2.

Case 5. : Convert this material model to Law1 elastic with same density, E, nu, and run. Check the results.

Case 6. : Open the LAW27_0000.rad

Change the shell properties to recommended shell properties.

Notice the material card. Johnson Cook parameters but different values for EPS based Failure.

Run the model with name LAW27

Compare 7 cases in a tabulated format on the basis of:

1. Total number of cycles, Energy error, mass error and simulation time.

2. Notice the animation of all 5 and describe the animations in brief on the
basis of whether the elements are being deleted or cracked.
3. Plot energies and notice any difference.
4. Based on all the results, which case would represent the on-field
scenario.
5. Prepare a ppt/docx and list down case by case result and your conclusion
as to why the failure happened.

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Case 1. : Run the model as it is. Name it Law2_epsmax_failure

>>Import Failure_Johnson_0000.rad file by using Solver Deck.

>>Run the Model as it name :- Law2_epsmax_Failure

>>after save as... select the radioss, them .h3d file is created.

Cycle :- 0 to 49377; Time :- 0 to 5.010 ; Time-Step :- 0.1018e-03; Element :- Shell; Error:- -0.3 % to 0.8 % I-Energy :-

Case 2. : In /FAIL/JOHNSON, change Ifail_sh = 1, Dadv = 1 & Ixfem =1. Run the model as Law2_epsmax_crack

Part Mass & Inertia

Cycle :- 0 to 49379; Time :- 0 to 5.010; Time Step :- 0.1018e-03 to 0.1011e-03, Element :- Shell ; Error :- 0.3 to 0.8%

Case 3. : Delete/Fail/JOHNSON card. Run the model as Law2_epsmax_nofail.

Case 4. : Delete the value of EPS_p_max & run the model with name Law2.

Case 5. : Convert this material model to Law1 elastic with same density, E, nu, and run. Check the results.

Cycle time Run time.....

Case 6. : Open the LAW27_0000.rad

Change the shell properties to recommended shell properties.

Notice the material card. Johnson Cook parameters but different values for EPS based Failure.

Run the model with name LAW27

Mat-id previous Mat-id new

Propshell-pervious Propshell-new

Cycle time Run time.....

Conclusion :-

As we run all cases as per given conditions, and we get the results as per Hyperworks Radioss.