Car body is the key to determine the safety of people in the car. Even if there is a beautiful appearance, there is no reliable internal design as the owner. However, some people think that the materials used in car body are thick and hard enough, that's safe.
In fact, this statement is too one-sided, because you don't know enough about the structure of the car body. Perhaps you will have different views after reading the following introduction.
What is body chassis frame construction like?
Fix the engine, transmission system and body assembly on a rigid frame, and then connect the frame with wheels through the rear suspension device, which is a car with body chassis frame construction.
Advantages: body chassis frame construction there is a beam running through the whole body structure, and the chassis has high strength and good anti-bumping performance. When the force of the wheel is uneven, it is borne by the frame, and the body is not easily twisted and deformed. It is common in trains, buses and off-road vehicles, and some high-class cars are also used.
Disadvantages: body chassis frame construction is relatively heavy, large in quality and high in height, and is mostly used on trucks, buses and off-road vehicles. However, because body chassis frame construction has good stability and safety, some high-class cars are also used.
What about monocoque body?
The difference between load-bearing and non-monocoque body cars lies in whether there is a girder that runs through the whole body. Monocoque body cars assemble the engine, transmission system, etc. to the body, that is to say, the whole body is integrated.
Advantages: smooth driving on Pingzhi Road, low natural frequency, low noise, light weight, common in cars.
Disadvantages: when the four wheels of the car are unevenly stressed, the body will be deformed.
The higher the body material strength, the better?
Many people think that the higher the strength of the body material, the safer it will be. But is this the case?
Actually, it depends on where it is used. On the frame of the driving room, it is necessary to use high-strength materials to ensure the safety of the driving personnel. However, in the front and rear parts of the car, materials with relatively low strength will be used for the consideration of absorbing impact force.
What is the function of the often-mentioned door anti-collision beam?
As an important defense line to reduce side impact damage of drivers and passengers, door anti-collision beam is particularly important. Because there is no too much space between the body and the door of the driver, it may be directly damaged by external forces, so the material strength of crash beam will be relatively high.
What does the so-called collapse and contraction energy mean?
The car is designed to protect the people in the car during collision, so the smaller the deformation of the driving room, the better.
At this point, when a car collides, part of the mechanism is allowed to collapse first and absorb part of the impact energy, thus reducing the impact force transmitted to the driving room.
What does body impulse transfer mean?
In car collision, the first consideration is to protect the people in the car.
When designing the car, it is considered that the impact force can be dispersed and transferred through the specially designed car body to reduce the impact force transmitted to the driving room and protect the car personnel.
