Assignment 6-Frontal Crash Simulation Challenge

AIM : Frontal Crash Simulation Challenge.

Frontal vehicle crash simulation of sidestepping Neon BIW the use of the RADIOSS solver and preprocessing the use of hypermesh/hypercrash.

OBJECTIVE:

• To perform frontal crash anlysis of a vehicle against a rigid wall in hypermesh.
• To simulate the crash behavior of the vehicle in hyperview and discuss the results.
• Sectional force in the rails at location of indicated node 174247.
• Axial force received on the rails from bumper.
• Shotgun cross sectional forces.
• A pillar cross section.
• Acceleration curve received on the accelerometer at base of B pillar (on B pillar rocker).
• Intrusions on the dash wall 66695,66244.

Check the unit system of the given starter file(neon_front_000.rad).

Open hypercrash asn set to KN mm ms kg.

And drag and drop the starter file in hypercrash.

• To check the penetration and Intersections,Quality-check all solver contact onterfaces-select all parts-check penetration.
• And there is no penetrations.

• Compare the model weight with the full scale 300k nodes model and use add masses.
• target weight is 700kg while getting CG
• we have to add mass to the current model.
• CHECK the mass-balancing.

• mass can be added for both front seats and back.
• To add mass. load case-added mass
• Create new-type1
• add mass
• we have added 3 new mass to current model.

• Export the model in rad file
• And import in hypermesh
• check the mass is at 700kg.

• Create an appropriate interface,frivtions 0.2 and recommended parameters.
• delete all the groups and create the contact interface.
• create-contact. TYPE 7
• Istf = 4,Igap = 2,Idel = 2,Stmin = 1,Gapmin =0.5,Inactiv = 6,Iform = 2

• For bumper - head light contact interface - nodes

• After creating the contact interface,review the check whether the master and slave are selected properly
• red - slave , blue -master

• create a rigid wall with friction 0.1
• In solver browser,create - RWALL-PLANE.

• INTIAL VELOCITY 35mph
• create - boundary conditions-INIVEL

• Give velocity components : 15.64 kmph and select all the set in the grnd_ID

• using Review check whether all the sets are assigned with the given initial velocity.

• For output request
• sectional force in the rails at the loctions of indictaes nodes 174247.
• The axial force received on the rails from bumper.
• SHOTGUN SECTION-SECTIONAL FORCES
• A PILLAR CROSS - SECTION.
• CRREATE-FRAME-MOV-CREATE BY NODE REF.-ZAXIS-YZ PLANE.

• Acceleration curve recived on the accelerometer at base of B pillar(on B pillar rocker).
• Create-accelerometer
• selecrt the nodes.

• model-check
• Hypermesh-tools-model checker-radioss

• status is completed with no errors.

energy curves:

Mass energy

• Internal energy(79.5,40492)
• kinetic energy(0.5,87311)
• total energy(1,878371

Contact energy

rigid wall

Result :

Thus the given model front half model was made to do the crash simulations with required inputs.