COMAPRE BASE SIMULATION WITH KINETIC SIMULATION

AIM

To compare the base setup simulation results and differant kinematic condition simulation results.

OBJECTIVE

Generate mesh for bumper system with mesh sizw of 6mm and compare base setup with variuos kinematic condition.

NOTE :

• Plot RWALL forces ,contact forces,internal energy and Create TH/PART for all parts and compare results for all cases.
• Comment your thought on why there is a change in the internal energies.
• How does the notch affect the results?
• Plot energies and note any differance.
• Submit your answer in a report format, explaining the steps clearly.
• Attach screenshots/image of the animation results.

FIRST CASE ( DEFAULT)

• Open crash_ TUbe 0000.rad file in hyperworks.
• Run the file as it is without changing any properties.
• Ater the run , open the obtained .hd3 file for viewing the deformation in hyerview and then the graphs are plotted with hypergraphs 2D in T01 file.

DEFAULT CONTACT FORCES

DEFAULT CONTACT AND TOTAL ENERGY

DEFAULT INTERNAL AND KINETIC ENERGY

DEFAULT RESULTANT NORMAL AND TANGENT

DEFAULT VELOCITY AND DISPLACEMENT

DEFAULT ENERGY AND MASS ERROR

Energy error = -3.8%

Mass error = 0.0%

cycles = 836500

Internal energy = 44280

SECOND CASE ( INACTI = 6 )

• Open crash_ TUbe 0000.rad file in hyperworks.
• Change the inacti value to 6 in TYPE 7 contact in contact interface section.
• Then run the file in radioss.
• After the run ,open the obtained .hd3 file for viewing of the deformation in hyperview and plot th egraph in hypergraph 2D in T01 file .

INACTI 6

INACTI 6 CONTACT AND TOTAL ENERGY

INACTI 6 INTERNAL AND KINETIC ENERGY

INACTI 6 RESULTANT NORMAL AND TANGENT FORCE

INACTI 6 RESULTANT VELOCITY AND DISPLACEMENT

INACTI 6 ENERGY AND MASS ERROR

Energy error = -3.8%

Mass error = 0.0%

cycles = 83600

Internal energy = 44280

THIRD CASE ( TYPE 11 CONTACT )

• Open crash_ TUbe 0000.rad file in hyperworks.
• IN contact interface wection change the TYPE 11 contact values as mentioned in the videos.
• Then run the file in radioss.
• After the run ,open the obtained .hd3 file for viewing of the deformation in hyperview and plot th egraph in hypergraph 2D in T01 file.

TYPE 11

TYPE 11 CONTACT AND TOTAKL ENEGRY

TYPE 11 INTERNAL AND KINETIC ENERGY

TYPE 11 RESULTANT NORMAL AND TANGENT FORCE

TYPE 11 VELOCITY AND DISPLACEMENT

TYPE 11 MASS AND ENERGY ERROR

Energy error = -1.7%

Mass error = 0.0%

cyclex = 04900

Internal energy = 43210

FOURTH CASE ( REMOVE BOUNDARY CONDITION)

• Open crash_ TUbe 0000.rad file in hyperworks.
• Remove all the notches using align nodes
• Then run the file in radioss.
• After the run ,open the obtained .hd3 file for viewing of the deformation in hyperview and plot th egraph in hypergraph 2D in To1 file.

REMOVE BOUNDARY CONDITION

REMOVE BOUNDARY CONDITION INTERNAL AND KINETIC ENERGY

REMOVE BOUNDARY CONDITION CONTACT AND TOTAL ENERGY

REMOVE BOUNDARY CONDITION RESULTANT AND NORMAL FORCE

REMOVE BOUNDARY CONDITION DISPLACEMENT AND VELOCITY

REMOVE BOUNDARY CONDITION ENRGY AND MASS ERROR

Energy error = -3.0%

Mass error = 0.0%

cycle = 77900

Internal energy = 44150

FIFTH CASE ( CREATING NEW NOTCH)

• Open previous file in hyperworks.
• Create a notch in the middle using align nodes
• Then run the file in radioss.
• After the run ,open the obtained .hd3 file for viewing of the deformation in hyperview and plot th egraph in hypergraph 2D in To1 file.

CREATING NEW NOTCH

NEW NOTCH CONTACT AND TOTAL ENERGY

NEW NOTCH INTERNAL AND KJINETIC ENERGY

NEW NOTCH RESULTANT NORMAL AND TANGENT FORCE

NEW NOTCH DISPLACEMENT AND VELOCITY

NEW NOTCH ENERGY AND MASS ERROR

Energy error = -3.7%

Mass error = 0.0%

cycle = 88700

Internal energy = 43970

SIXTH CASE ( CREATING NEW NOTCH SYMERTICAL TO EACH OTHER)

• Open the previos file in hyperworks.
• Remove the notch created for the previous case.
• Create a notch symmetrical to each other.
• After the run ,open the obtained .hd3 file for viewing of the deformation in hyperview and plot th egraph in hypergraph 2D in To1 file.

FINAL NOTCH

FINAL NOTCH CONTACT AND TOTAL ENERGY

FINAL NOTCH INTERNAL AND KINETIC ENERGY

FINAL NOTCH RESULTANT NORMALA DN TANGENT FORCE

FINAL NOTCH DISPALCEMNT AND VELOCITY

FINAL NOTCH MASS AND ENERGY ERROR

Energy error = -3.2%

Mass error = 0.0%

cycle = 84900

Internal energy = 43450

BUMPER SYSTEM

• Export the given .hm file
• Mesh the given geomtery with mesh sixe = 6.

CONCLUSION

• IN first case the run is done without changing any properties, it does not affect anything.
• CHanging the INACTI value to 6 does not change the results from second case to first case.
• THe contact force (to prevent slave nodes to entr into master segment for TYPE 7,edges slave nodes into msteer in TYPE 11interfaces) and the forces increased in third case due to TYPE11 conatct interface and TYPE 7 value changes.
• IN all the cases the deformation occured in the notch except in fourth case.
• AFter removing of notches in the fouth case there is a decrese in contact,internal and rigid wall forces in fourth case.
• IN fifth case the notch is in the middle which results in higher contact force because if initial intercations.
• IN sixth case we have only two notches symmetrical to each other ,results in greater conatct , internal and rigid wall forces.
• The purpose of the notch is to direct the deformation in a predictable manner, witghout notches as beacon the simulation would be unpredicatble which results in chaos.

CASE 1

Energy error = -3.8%

Mass error = 0.0%

cycles = 836500

Internal energy = 44280

CASE 2

Energy error = -3.8%

Mass error = 0.0%

cycles = 83600

Internal energy = 44280

CASE 3

Energy error = -1.7%

Mass error = 0.0%

cyclex = 04900

Internal energy = 43210

CASE 4

Energy error = -3.0%

Mass error = 0.0%

cycle = 77900

Internal energy = 44150

CASE 5

Energy error = -3.7%

Mass error = 0.0%

cycle = 88700

Internal energy = 43970

CASE 6

Energy error = -3.2%

Mass error = 0.0%

cycle = 84900

Internal energy = 43450

LINK for the models

https://drive.google.com/open?id=1E_Ew4pCqJh1rF7rhswlyStHb-MFyuxsf