Crashworthiness and Occupant Protection in Transportation Systems I ME 8020 Test No.1

Crashworthiness and Occupant Protection in Transportation Systems IME 8020

Test No.4

SIDE IMPACT andEffect of frontal crash on Steel and Composite rail Analysis

Presented By: Suravi Banik (fz4276)

Objective Side impact test with poleSide Impact test with Moving Deformable BarrierSteel analysis in railsComposite Analysis in rails &What if Analysis

Side ImpactThe National Safety Council reportsside-impactcrashes, also referred to as roadside, or T-bone collisions, are second only to head-on collisions in the number of serious injuries and fatalities they cause each year. During aside-impactcollision, onecarhits the other in a perpendicular direction.

The purpose of side impact test is To reduce the risk of serious and fatal injury to occupants of passenger cars, multipurpose passenger vehicles, trucks, and buses during side impacts.To obtain vehicle crashworthiness test data for different types of side impact tests.

Model Description

Car Model Selected:

1. Small SUV; Weight of the truck= 1345 kg

2. Dummy: weight: 79 kg

Side Impact with pole (Full model): Vehicle is moving to the side direction at a velocity 31 mph

Consequences after Side Impact with pole

60 ms

Side Impact with Pole (animation)

Energy plot without dummy (matsum & gstat) [pole]

Kinetic EnergyInternal Energy

Energy plot with dummy (matsum & gstat) [pole]

Kinetic EnergyInternal Energy

Velocity and displacement vs time plot [pole]

What if analysis [pole] (1): changing the thickness of door and B-pillar

Originally, thickness of F-OB-DOOR-DRVR-INNER-SILL-LEFT=1.95 mm; for what if analysis it is 6 mm

Originally, thickness of F-CH-B-PILL-INNR3 =1.10 mm; for what if analysis it is 5 mm

GivenModified GivenModified

What if Analysis -video[pole]

Comparison between main and what if file [pole]

Main file What if

Side Impact Test with Moving Deformable Barrier

The moving Deformable Barrier strikes stationary vehicle at 90 degrees.Weight of the deformable barrier =1500 kg

Side Impact with Barrier (Full model)

Scenario after the side impact with barrier

Side Impact with barrier (animation)

Energy plot (matsum & gstat) [side impact with barrier]

Total energyKinetic energyInternal energyKinetic energy

Velocity and displacement vs time plot [barrier]

RAIL of steel in frontal impact:Some parts like outer rails are taken to analyze instead of full vehicle considering mass moment of inertia.

RAIL of steel in frontal impact (video)

After frontal impact with steel materials of rails

Energy plot (matsum & gstat) [steel]

What if Analysis: changing the thickness of outer rail (steel)

Original file

Changing the thickness

What if Analysis in steel (video)

What if Analysis in steel after frontal impact

Composite Analysis:

Some parts of rails are changed to composite materials.

Composite Analysis

Scenario of the rails with composite materials parts after frontal impact

Energy plot (matsum & gstat) [composite]

What if composite (changing the angle and thickness of the composite materials)

Original fileChanging the angle and thickness

What if [composite analysis]

What if [composite analysis] : scenario after the frontal impact

ConclusionSide impact with pole and moving deformable barrier causes more or less injuries to the occupants whether it has restraint system or not. Side airbag also plays an important role to protect the occupants from the side impact crash. The energy plots of both the side impact tests are balanced.Changing thickness of door and B-pillar causes a little change of impact but not very significant.From the frontal test with steel materials in rails, we can see that due to frontal crash intrusion occurs to the occupants which is really dangerous.From the composite analysis we can see parts are separated from the rail due to the frontal crash so that less intrusion occurs.Using composite materials rather than steel reduces the weight of the vehicle and absorbs more energy.Using composite is less costly than using steel or aluminum.Composite materials are more safe than any other metals.