Assignment 4-RADIOSS Material Laws Challenge

RADIOSS MATERIAL LAWS CHALLENGE

Aim: To run analysis on the model and observe the elements behaviour by changing material properties in the material card.

Given Model:

Procedure:

Case 1: Law2_epsmax_failure.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material properties are to be changed as per the case 1 recommendation. Also assign the Ifail_so value as "1" in failure card and run the analysis.

• After running simulation, energy error and mass error need to be verified. The energy error needs to be in the range between -15% to +5%. The energy error value near to 0 represents a good model.
• After the end of simulation open 000.outfile to check the energy error and mass error.

• In this simulation the energy error is near to 0.8% which is acceptable and mass error is 0.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 2: Law2_epsmax_crack.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material properties are to be changed as per the case 2 recommendation. Now Change Ifail_so to (0) default, Dadv to 1 and Ixfem to 1.

• After assigning the property card to the component run the analysis.
• After the simulation the energy error and mass error need to be verified just like the previous case.

• The energy error is 4.1% which is acceptable and mass error still remins zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 3: Law2_epsmax_nofail.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material properties are to be changed as per the case 3 recommendation. In this case delete the failure card to observe the element behaviour.
• After assigning the property and material to the component, run the simulation.

• After the simulation the energy error and mass error need to be verified just like the previous case.

• The energy error is 0.8% which is a good result and mass error still remians zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 4: Law 2.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material properties are to be changed as per the case 4 recommendation and eps_max value is changed to 0. There is no failure card in this case.
• After assigning the property and material to the component, run the simulation.

• After the simulation the energy error and mass error need to be verified just like the previous case.

• The energy error is 3.0% which is acceptable and mass error still remins zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 5: Law1_Elastic.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. New material card is created using Law1 Nu, E, density values.
• After assigning the property and material to the component, run the simulation.

• After the simulation the energy error and mass error need to be verified.

• The energy error is 1.3% which is acceptable and mass error still remins zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 6: Law 36.

• Import the strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material card is edited as per the values given. For Number of functions value 1 is given. New curve is created using the x any y values.
• After assigning the property and material to the component, run the simulation.

• After the simulation the energy error and mass error need to be verified.

• The energy error is 0.8% which is acceptable and mass error still remins zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Case 7: Plas_tab_law27.

• Import the "law27" strater file using the import solver deck option.
• Now go to the model, edit the properties as recommended. Material card as be edited as per the Case 7 recommendation.
• After assigning the property and material to the component, run the simulation.

• After the simulation the energy error and mass error need to be verified.

• The energy error is 0.8% which is acceptable and mass error still remins zero.
• Now open hyperview and open the h3d file to visualize the contour plots for displacements and von mises stress.

• Now open the hypergraph 2D and open the T01 file to plot the graph between energy vs time and rigid wall forces vs time.

Graph 1: Energy vs Time

Graph 2: Rigid wall forces vs Time

Comparing No of Cycles, Energy error and Mass error:

Case	No of Cycles	Energy Error	Mass Error
1.	49379	0.8	0.0
2.	49216	4.1	0.0
3.	49407	0.8	0.0
4.	48736	3.0	0.0
5.	47968	1.3	0.0
6.	53147	0.8	0.0
7.	49506	0.8	0.0

• Case 6 has the maximum number of cycles and Case 5 has less number of cycles.
• Mass error is 0 in all the cases.

Animation Observation:

Case	Element Behaviour
1.	Elements Deleted
2.	Few deleted and few Cracked
3.	Elements deleted
4.	Show elastic behaviour
5.	Show elastic behaviour
6.	Cracked linearlly
7.	Deleted linearly

Energy Plot Observation:

• Total energy is almost equal to internal energy in all cases.
• Kinetic energy is zero in all cases.
• The energy is linearly increasing in 1,2 and 3 cases and linearly with slope in 4,5,6 and 7 cases.

Conclusion:

Analysis has been done on the model and element behaviour changes has been observed by changing material properties in the material card.