The bumper is the most vulnerable part of the vehicle to be "injured", and once a collision occurs, the bumper will most likely appear on the damage list. After all, this is linked to the maintenance cost, so some people think: Plastic ones are damaged when touched, why not replace them with iron ones? But friends who like cars should know that the first car bumpers were made of iron, and they have continued to evolve to this day. Become plastic. For safety reasons and production, plastic is actually more suitable.
Collision is an instantaneous acceleration change process. The greater the rigidity of the car body, the greater the acceleration generated during the collision. This also means that when the occupants in the car are hit, they will experience a stronger sense of head dizziness, seat belt restraint, etc.; if the occupant's body collides with items in the car or components such as the steering wheel, the impact will be stronger. Therefore, the front part of the car body is now designed with a collapse area to allow the car to absorb as much energy as possible.
Deformation zone: low-speed protection, protecting pedestrians and vehicle structures;
Compatibility zone: medium speed protection, try to reduce the acceleration peak;
Self-protection zone: high-speed protection, preventing deformation and protecting the space inside the car.
The bumper is in the deformation zone.
Low-speed collision energy is low, and the deformation characteristics of the plastic material itself allow it to provide good cushioning for passengers in the car, pedestrians outside the car, and body parts to avoid unnecessary injuries and losses.
