How are the car crash tests
• How are the car crash test
In today's world with the development of the car can not do without computer simulation, but no computer can not detect potential deficiencies in the safety car. Identify all the weak model places can only be in the "battle" conditions, so every year the largest auto giants smash a few hundred cars to make sure they are secure. All known avtobrendy have sites for comprehensive testing of its products for durability, there is an independent laboratory.
Today we are accredited by the example of the German ADAC crash-center look at how to run car crash tests.
Welcome to the crash ADAC center in the Bavarian town of Landsberg. The Center is accredited and meets the requirements of Euro NCAP - the European Committee for the independent crash tests of cars with active safety and passive safety assessment.
As of today, all vehicles are tested in one of two accident scenarios - European Euro NCAP and US NHTSA. As you might guess, now we climb the script.
Crash Dummy Center ADAC.
The front of the machine meet with an obstacle leads in the number of victims. Unfortunately, even the stringent tests on both versions (NHTSA and EuroNCAP) are largely artificial and often do not give an objective assessment of safety. In particular, the car was tested only at a certain speed, and the tests do not provide an answer, which is the deformation at higher or lower speeds.
Also, these tests do not consider the situation of the collision of a passenger car with large vehicles: buses, tractors, trucks.
Children's dummy in the analysis.
form a complete picture of the reliability of a particular model can only be with the help of numerous frontal and side collisions. For example, before you hit the market, the car Mercedes should pass necessarily entire 28 safety tests.
The first safety tests looked very monotonous: two cars of one model simulated a frontal collision at a speed of 55km / h with a 50% overlap. Today testers are increasingly collide cars of different classes, so, for example, "Volvo" conducted simulated collision between a passenger jeep S40 and XC90.
Final preparations for crash tests.
Often, the test program on the safety of passenger cars includes collision with a goods vehicle at a speed of 56 km / h with a 50% overlap. In most cases, a passenger car is under-body multi-ton machines, reducing the chances of survival of passengers to zero. These tests have allowed to save many lives, through the development and introduction of the so-called FUPS underrun construction truck.
But the head-on collision can not identify all the design flaws of the test models, many of them can be found only in a side impact.
According to statistics, only 2% of crashes car overturned, however, almost half of a revolution becomes a cause of death of passengers. Most susceptible to coups convertibles and large SUVs with a high center of gravity.
It is interesting that crash tests are not always carried out at high speeds. For example, the safety of the fuel tank is checked as follows: a cart with a load hit the rear bumper of the car ceiling of 40% at 15-40 km / h.
Special tests are carried out with the vital elements of the design - the seats and seat belts. For this purpose there is a special booth with a dummy, which accelerates to the desired speed and then brake sharply.
Mannequins are installed in the car.
Euro NCAP test takes place in 4 stages. Should first frontal impact at 64 km / h with 40% overlap in the overlap deformable.
After checking the safety of the machine side: trolley car attacked a mass of 950 kg. Then test confronted with iron pillar 254 mm in diameter at 29 km / h.
Crash Center ADAC. Everything is ready for vehicle safety tests.
The fourth test point - car security test for pedestrians: a dummy shot down at a speed of 40 km / h.
Today we follow the leader in the number of victims - a frontal assault. Euro NCAP test conducted at a speed of 64 km / h with 40% overlap. Go!
We are looking at a collision at a speed of 64 km / h. Mannequins wearing, airbags work.
And what happens in a collision at higher speeds when drivers ignore safety belts?
French experts have long removed ultrafast camera car collision process at a speed of 80 km / h with a fixed obstacle. Inside, they were dummies with sensors, fixing the degree of trauma that would be from living people. Mannequins are not wearing, the airbag is deactivated. The results are shocking:
At 0, 026 seconds: bumper cars after hitting pressed. The force exceeding a vehicle weight of 30, inhibits its movement approximately on the line of the front seats. However, the passengers and the driver, if they ignored the fasten seat belt, continue by inertia movement in the cabin at the same speed - 80 km / h.
After 0, 039 seconds: a driver's seat is moved forward by 15 cm.
At 0, 044 seconds: the driver rests on the chest in the steering wheel and breaks it.
After 0, 05 seconds: deformation slows the vehicle, he stops abruptly. In this case, the inertial force continues to act on objects inside the machine. The strength of the congestion affecting the passengers and the driver, 80 times their own weight. After 0, 068 seconds: a driver with a force of 9 tons cuts into the dashboard.
After 0, 092 seconds: the driver and front passenger sitting synchronously heads bite into the front windshield give fatal injuries.
At 0, 1 second: dangling on the steering wheel the driver leans back - this time he was already dead.
After 0, 11 seconds: the vehicle starts to roll backward.
At 0, 113 seconds: not buckled rear passenger sitting behind the driver, by the time reaches the front seat and put the second stroke. If the driver at this point a miracle remained alive, this blow it will finish. Rear passenger also receives a collision fatally injured.
After 0, 15 seconds: inertia possession. The car finally stopped. Only fragments of plastic and metal with glass shards fly away. A cloud of dust envelops the clashes. Inside, the body lay motionless.
The tests are not limited to the above list of tests, some of which may have a very small percentage in relation to the total number of accidents (for example, a car accident with a trailer). However, we can say one thing: all the famous brands of cars on safety of its products paramount, machine safety is increased with each passing year.