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November 28, 2011 Forensic Engineering No Comments

Crash Test: Head-On Collision

1962 Cadillac and 2002 Cadillac

 

This video has good technical information which is unfortunately not presented in a scientific manner related to the head-on impact between a 1962 Cadillac Sedan de Ville and 2002 Deville at 50 miles per hour.

From an analytic and forensic engineering analysis perspective there is a great deal of very relevant safety-related documentation in this type of crash test.

This crash test conclusively shows that modern cars are much safer than older classic cars regarding crumple and crush zones, in addition to seat attachment to body integrity issues which are visibly shown in the video.

The information is good but you will have to survive the presentation.

 

httpv://www.youtube.com/watch?v=O-WYKYrq5FI&feature=player_embedded”>

Europe Test Crash of Ford Focus at 120 MPH

 

Focus Immediately Before Impact

Focus Immediately Before Impact

The European TV show Fifth Gear had the Transportation Research Laboratory (TRL) crash a Ford Focus at 120 mph.

This staged crash test represents a worst case collision scenario where the car impacts a rigid, non-deformable, barrier.

After impact you will see the non-flammable Stoddard Test Fluid coming out of the fuel tank. The test fluid is put there to test fuel tank physical integrity.

 

Here are calculations associated with 40 mph and 120 mph collisions. The 120 mph collision has 9 times the energy of a 40 mph collision.

 

Note that with this equation the energy goes up with the square of the speed, which means that there is 4 times as much energy at 40 mph than 20 mph (40×40= 1600 and 20×20=400).

You can clearly notice that your car takes a lot longer to stop from 60 or 70 mph than from 40 mph because of the square the speed energy issue. To simplify the calculation some more, if you square 60 = 3600 and the square of 40 = 1600 so there is more than twice the energy at 60 than 40.

With 10 the square is 100 and 15 the square is 225. Auto crash testing is typically conducted at speeds up to 40 mph (40×40=1600). There is 16 times as much energy at 40 than 10.

Remember to drive safely. The reality associated with the math applies every time you get behind the wheel.

Collision Gallery Photographs

Collision Gallery

buick-wagon-side-impact-frontCheck out the Collision Gallery.  It contains interesting and educational photographs of collision vehicles and components.  Each picture tells a story related to the collision phases of: pre-crash, impact, and post impact for the driver, vehicle and environment.

buick-wagon-side-impact-rear-1Automotive Tribune has a substantial forensic photographic library.  If you have an interest in a particular type of vehicle or collision event including pedestrian, skateboard, tree, tractor trailer, sports car, SUV, motorcycle, trailer, commercial machinery, golf carts, guard rails, lift gates, tires, lights, brakes, wheels, axles, fire, maintenance, towing, vehicle recovery, aerial photographs, damage documentation, overloading, pavement drop-off, component failure or collision analysis let us know and the photos will be added to the gallery.

Salvage Auction = 1 Million+ Vehicles Per Year

Advertised Copart Cars May Be A Golden Bargain

Advertised Copart Cars May Be A Golden Bargain

If you qualify as a dealer, dismantler, rebuilder, wholesaler, automotive related business, general business, exporter, you already know about this and as a private individual in Alaska, Arizona, Minnesota, North Carolina, and Oregon then you might be able to get through the front door.  With the proper credentials you are now a Dealer and in certain circles the Dealer License can be a License to Print Money!

There is a very stong probability that you know about these places but you have not been there to walk through the property or participate in an auction.  This is an important Tribune topic which represents a massive multi-billion dollar business that operates off your radar. … Continue Reading

Forensic Engineering – An Introduction

Sedan Rear Impact

Sedan Rear Impact

For the past 23 years I have provided consulting services to corporations, insurance companies and attorneys with primary focus on vehicle technology and product liability with additional activites involving vehicle black box analysis and accident reconstruction.  Along the way I have looked at all sorts of transportation related product failures and accidents with regard to issues such as product liability and been an expert witness in approximately 1,000 depositions and 100 trials.  20 years ago no one could spell Forensic and now it is on the TV. … Continue Reading

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