Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
Why Car Crash Tests Are Not Fast
Regarding the driving speed of the car crash safety test, it is almost impossible to find a car crash test with a speed of 100K kilometers per hour. The tests in China, Germany, Japan, the United States, Europe, Australia and other countries that can be found online are almost 50 to 60 kilometers. , why not test a higher speed? First of all, the principle of the car crash test is to simulate the state of the actual traffic accident. Generally, when a crash occurs, the car does not hit the target at full speed. There is a braking action. The 2012 version of China's C-NCAP crash test claims to have adopted almost the same crash standards as the European safety crash: a frontal collision with a vehicle speed of 50km/h and a 100% overlap of rigid fixed barriers, a vehicle speed of 64km/h, and a collision rate of 64km/h. Frontal offset collision with 40% overlapping rate of deformable barriers, side collision of deformable moving barriers with a speed of 50km/h, and neck protection test items after low-speed rear collision. Secondly, the energy at the time of the collision is proportional to the square of the speed of the vehicle. Even if the car with the best five-star safety test encounters a collision at a higher speed, it will be vulnerable. It's almost pointless to test higher speed crashes, a fool would crash a car at full power, and the car wasn't built to crash. At higher speeds, all kinds of cars crashed into a pile without distinction. In fact, with the advancement of design level, technology and materials, the speed of crash test is gradually increasing, and the test standard is becoming more and more demanding.
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Ball Burst Method (ASTM D3787): Steel ball penetration for textiles/films using testers like GT-C02-2.
Hydraulic Method (ISO 13938.1): Fluid pressure on rubber diaphragm for industrial fabrics via GT-C12A.
Pneumatic Method (ISO 13938.2): Compressed air for breathable materials tested with GT-C12B.
Results are influenced by raw materials, yarn properties,
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