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

Crashworthiness and Occupant Protection in Transportation Systems IME 8020

Test No.2

Head On Collision between SUV and Truck

Presented By: Suravi Banik (fz4276)

Objective of the Test

Ahead-on collisionis a trafficcollisionwhere the front ends of two vehicles such as cars, trains, ships or planes hit each other in opposite directions, as opposed to a sidecollision or rear-endcollision.

The objective of a crash test for Federal Motor Vehicle Safety Standard (FMVSS) No. 208 is to measure how well a passenger vehicle would protect its occupants in the event of a serious real world frontal crash. This is sometimes referred to as the crashworthiness of a vehicle.

Head On Collision Conducted

SUVTruckWith 95th percentile dummy

Model Description

Car Model Selected:

1.C1500 Pick Up Truck (NCAC V4); Weight of the truck= 1716.97 kg

2. SUV; Weight of the SUV= 2255 kg

3.Dummy: 95th percentile Dummy (weight: 79 kg)

Full model (Truck_SUV_Dummy)

ProcedureOriginal Model runChecking original model of any initial errorsFull model run (vehicle airbag dummy)Including airbagConnecting beamsChecking consistency of unitsPositioning dummy Defining contact and velocityTest results

Defining Contact and Load CaseContactContact_Automatic_Surface_to_Surface contact was provided between every possible contact that may occur i.e.Truck with SUV Truck Interior with Dummy Interior of SUV with DummyLoadcaseAll the node of truck and dummy inside the truck assembly were provided with the initial velocity of 30mph (13.41 m/s) and SUV with 0 velocity. The termination time was set-up to be 0.1 sec.The model was run with Normal Termination.

Collision between Truck and SUV without Dummy

20 ms40 ms60 ms

Collision between Truck and SUV without Dummy

80 ms100 ms

Collision between Truck and SUV without Dummy

Energy plot (Truck_SUV collision without dummy)

MATSUM (Truck_SUV collision without dummy)

Collision between Truck and SUV with Dummy (20 ms)

Collision between Truck and SUV with Dummy (40 ms)

Collision between Truck and SUV with Dummy (60 ms)

Collision between Truck and SUV with Dummy (80 ms)

Collision between Truck and SUV Dummy (100 ms)

Collision between Truck and SUV Dummy

Observation from the simulationsFrom the test simulations we can observe from the time duration0 20 ms: Truck and SUV collide with each other and the airbag deploy

20 ms -40 ms: Bumper of the two vehicles intrude each other

Observation from the simulations40 ms -60 ms: Front side of the two cars got distoerted , specially the SUV got distorted more.

60 ms -80 ms:

80 -100 ms: Engine is completely stacked up on the dash and chances of intrusion can be predicted. The dummy falls down towards airbag.

SUV with Dummy and belt Frontal crash with rigid wall

SUV with Dummy and belt Frontal crash with rigid wall

Energy plot (SUV with Dummy and belt)

MATSUM(SUV with Dummy and belt)

Conclusion

As the tests of collision are done without seatbelts, so the chance of injuries of dummy are more rather than with belt.

The kinetic energy of the crash is dissipated by crush of vehicle and rebound velocity.

Damage of the stationary vehicle is more than the moving vehicle

Improvements

As the bumper and crash can are the main components to absorb energy so the car can be made more efficient from structural aspect by increasing the thickness of hood or rail or stiffness of these components.