Emgrand rear anti-collision beam is made of aluminum alloy. The rear anti-collision beam made of this material has low water absorption, high impact resistance, good rigidity, good oil resistance, cold resistance, good chemical resistance, good dimensional stability and aging resistance.
The working principle of the front and rear anti-collision steel beams of Geely Emgrand GS is that if a vehicle collides with an obstacle at medium and high speed, the front anti-collision beam will distribute the impact energy to the energy-absorbing box, and the energy-absorbing box will be damaged immediately, and the remaining energy will be divided into two side longitudinal beams. The longitudinal beams are responsible for evacuating the impact energy backwards to the whole body, and the whole body frame will absorb energy, thus reducing the force on the drivers and passengers.
When Geely Emgrand GS collides at the speed of 10KM/H, it will transfer the impact force to the energy-absorbing boxes on both sides, that is, the buffer zone of the anti-collision steel beam, so the anti-collision beams of most models can play a very good role.
When the speed of Geely Emgrand GS reaches 40KM/H, the anti-collision beam will start to protect the drivers and passengers. It will directly disperse the impact force to the two longitudinal beams of the car body, so that the overall rigidity of the car body can share the impact force, which can reduce the impact force borne by the drivers and passengers, thus playing a role in protecting the drivers and passengers.
When the speed of Geely Emgrand GS reaches 80KM/H, a collision occurs, and the role of anti-collision steel beams can be ignored. At this time, it depends on the structural design of the car body, the overall rigidity of the car body and how many airbags are equipped.
As we all know, triangles are the most stable structure, and the body frame is actually composed of many irregular triangles to resist the impact from all directions, but it should be noted that the bearing capacity of the frame is not the same everywhere, because it is related to the transmission and collapse of forces.
The significance of the front and rear anti-collision beams is the device that the vehicle bears the impact force for the first time. There is a very important concept of passive safety of car body, that is, the whole car body is stressed a little. To put it bluntly, the car body was hit somewhere. If only this part is allowed to bear the load, the protection effect will be poor. If the whole skeleton structure bears the stress at a certain point, the stress intensity at a certain point can be reduced to the maximum extent, especially the front and rear anti-collision steel beams play an obvious role here.
The two ends of the anti-collision beam are connected by low-speed energy-absorbing boxes with low yield strength, and then connected to the longitudinal beam of the car body by bolts. The low-speed energy-absorbing box can effectively absorb the collision energy when the vehicle collides at low speed, reduce the damage of the impact force to the longitudinal beam of the vehicle body as much as possible, reduce the maintenance cost, and the bolt connection mode can replace the anti-collision beam more conveniently.
In high-speed offset collision, the impact beam can effectively transfer the impact force from the left side (or right side) of the car body to the right side (or left side), so that the whole car body can absorb the impact energy as much as possible. In the case of low-speed collision (generally below 15km/h), the anti-collision beam can avoid the damage of the impact force to the front and rear longitudinal beams of the car body and reduce the maintenance cost.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)