Industry News

Vehicle safety factor-3

2020-09-15

Passive safety technique
For safety-related functions, you might be more concerned about something that you can't see, the thickness of the steel plate.
And the problem of steel plate is a kind of passive safety of automobile.
Passive safety is the extent to which a vehicle can give you protection in the event of an accident.
Passive safety is closely related to the rigidity of car body structure, energy absorption and collapse performance and surface material coverage.
The vehicle is not thick steel plate thickness, but refers to the carriage frame.
It is the hardest part of the body structure, its strength to ensure the living space of the occupants of the car, so it can not easily deformation.
Today, most vehicles are made of high-strength steel, ultra-high-strength steel, hot formed steel and other materials.
The application proportion of high-strength steel reaches 60% to 70%, in which column A and Column B also use high-strength hot formed steel and laser welding technology, so as to ensure the integrity of the interior space to the maximum extent in the collision.
In addition, high-strength steel can effectively conduct and disperse the impact force. In short, it can change "point" collision into "surface" collision and reduce the energy generated by the collision to the maximum extent.
This leads to the second property of passive safety, energy absorption and collapse.

Now many cars are using more and more composite materials and new materials.
And this way, if you have good stamping technology, the car can absorb most of the impact energy in the first place.
Keep us safe.
The thicker the outer plate, the greater its rigid strength, in low-speed driving collision, the rigid body is not easy to deformation, vehicle loss is relatively small;
And when driving at high speed, due to the rigidity of the outer plate, the front of the body is not easy to deformation and lead to the overall compression to the cab, so the damage to the car personnel is relatively large, and because the steel plate is too thick, will also increase the body weight and fuel consumption.

People think that the thickness of the steel plate is particularly important and most of it is due to the visual and touch of the heart and the sense of stability when driving.
However, when a car traveling at a speed of more than 50 kilometers per hour in a collision, the car's safety is determined by the body structure, not the thickness of the steel plate covering the car.
Therefore, from the point of view of safety alone, the steel plates on these surfaces are only the covering parts of the car, that is, the exterior plates, which have limited contribution to the rigidity and strength of the body.
Of course, this is not some manufacturers in order to cheap, deliberately reduce the strength of the body material excuse.
The lightweight materials now used by many car companies, coupled with stamping technology, can largely absorb the impact of an impact.

Finally, although the energy absorption area absorbs most of the impact force, BUT there is still energy transmitted to the car through the body structure. At this time, the airbag and seat belt in the car will play their role, and also adopt a flexible and rigid way to buffer a large part of the impact energy to protect us.
Although car owners may be concerned about their cars being damaged, the main service for car safety should be drivers and pedestrians.
If the car shell is too hard, it obviously cannot guarantee the safety of the car owner and passersby, because its poor energy absorption ability cannot bear part of the huge impact of the collision.
Then, the energy of a car crash goes directly into the human body, causing great damage.
And for pedestrians, if the car shell hardness big car hit, the consequences will be more serious.
Therefore, thick car instead will threaten the safety of people.

In short, "thicker cars are safer" in today's increasingly sophisticated manufacturing technology, is certainly a fallacy or too one-sided.
It is recommended that people should consider a variety of factors when buying a car and pay more attention to energy absorption.
But the shell, thick or thin, is never 100% safe.
Only every car owner strictly abide by the traffic rules driving, the real safe travel can be achieved!