Assignment 5-RADIOSS Interfaces & Study of Effect of Notches Challenge

Aim: Create the 2D mesh for bumper assembly.Create a different type of interface, assign recommeneded values to interface and compare the base simulations setup results.

Objective :

• To generate the mesh for the given bumper component with the mesh size of 6mm.
• To change the parameters for the given crash tubes model as various cases.
• To plot the graphs with RWALL forces , contact forces , internal energy(post-processsing)

MOdel 1: Meshing of bumper assembly

Import given model into hypermsh.

Assign quality parmeters:

• To give the criteria , click on the preferences in the standard menu bar
• to mesh select the automesh option from the 2D panel
• After the mesh is completed make sure the model does'nt have the tria elements .
• 
• giving a proper connection between the crash box and rear bumper.
• 

Model 2:

Case 1:Run the crash tube model as it is.

After the model is imported .The simulation needs to be performed without changes in model in this case.

• In oder to create the THPART we have to click on the output blocks and create the TH PART in entity id .
• TH PART is created.

• Open hyperview to animation and contour plots from H3dfile.

• open the hypergraphs 2d for observing the energy plot data from TA01 file.
• Energy error and mass error are within the limits- (less than 15% and 1% respectively) as the recommended shell properties are applied to the component

CASE2:Change the Inacti=6 and run.

Case3:Create the type 11 contact and run.

Case4:Remove both notches and remove boundary condition on rigid body node then run.

• In this case the notch need to removed.
• save the file in other folder
• delete the boundary condition BC
• remove the notches using allign node.

Case5:Create a new notch in the middle ,select the whole section and run.

Case6:Create a new notch with nodes only from opposing 2 faces and run.

• In this case a notch should be created at the same place in the opposite direction.
• usng translate option.
• Notch is created.

RESULT:

CASE NO.	Particulars	Energy error(%)	Mass error(%)	max. contact force(N)	Max rigid wall force(N)	Max contact energy (KJ)	Reason
CASE 1	Running model as its is	-3.8	0	69.533	1400	2	Node to surface contact type 7
CASE 2	change inactive = 6	-4.8	0	69.533	1500	2.6	No intitial penetrations found
CASE 3	Type 11 interface	-3.9	0	112.5	1300	1.9	Type 11 Edge to edge contact
CASE 4	Removing notches and BC	-2.5	0	61.09	1200	1.3	No boundary condition , flat surface
CASE 5	creating new notch to middle	-3.6	0	61.94	1300	1.3	Ability to absorb increased due to middle notch
CASE 6	create notch only on opposte side.	-3.2	0	69.45	1100	1.5	Due to opposing notches.