What is a spar? What does it look like? Is it capable of bursting? What consequences are waiting for a vehicle if the spar "leaves" or "tired"? And finally, where is this car element? In this article we will respond in detail all these questions.

Car spar, for what it needs a car

The spar is a rectangular pipe, which passes through the rear or front part of the vehicle either at all through the bumpers.

The spar is the main power component of the car: in frame vehicles (heavy SUVs, trucks) spars are part of the frame, and in frameless (passenger transport) serve as an amplifying part for the floor of the luggage compartment, the bottom of the body and mudguards.

What a spar looks like

The spars are suitable (manufactured by a stamping method or by milling - look like a one-piece element) and composite (set of iron parts). In the standard design of them, as a rule, two are right and left. Each of them is conditionally divided into three parts - the front, middle and rear side member. Regarding each other, most often, they are in parallel, but some framework structures provide their location at a small angle.

If you look at the photo of the car from the inside, you can see that the spars look like a staircase frame and look like the letter "P". As mentioned above, the staircase frame is usually used for trucks, crossovers and SUVs, and "cargoes", often equipped with a carrier structure of the housing.

Car spar, what material is made

Spars, most often, made of aluminum and titanium alloys, as well as composite layers. The main section of the detail is a channel (P-shaped section). In the most loaded places it increases.

Design features of the spar, what loads withstands

Depending on the design, the spars can pass along the entire length of the housing or to be placed in the front and front of the car. As a result of the fact that they are constantly pressing different forces, the spars have to withstand serious loads, which can be attributed to the weight of people in the car, the weight of the engine, as well as the mass of other automotive elements. In addition, the percussion load is valid for this detail, transmitted when driving from car wheels.

Car spar, which tasks are assigned to these elements of the car body

In addition to all above, the spar is a shock absorber of the front body of the body, since it is located in the area of \u200b\u200babsorption of deformation. Too durable and rigid body design is not able to absorb the energy of the strike, as a result of which the body actually transmits the energy to the car passengers.

To part of the body where the passengers are located, the minimum is deformed, you need to soften the blow. To do this, deformable zones are organized in the posterior and front parts of the body, the strength structure of which is consciously weakened in the longitudinal direction. In particular, the spars weaken with different methods - in low-loaded places there are special holes and end-to-end slots, reduce the thickness of their cross section or walls, create special folds when stamping, which include grounding of spars during accidents and so on. These parts in a collision are subject to significant destruction, however, at the same time, most of the kinetic energy absorb, which reduces the blow strength, which is directed towards the cabin.

Spars, which problems arise from spars under the action of loads

Under the influence of loads of spars, over time, is able to deform, especially the forefront. Although the rear spars are also capable of "tired" and crack. The word "tired" implies the appearance of a crack, which over time grows throughout the spar. Of course, the accident can also leave an essential trace.

Operating a car with damaged spars. Danger for life, why

When operating a vehicle with damaged spars, there is a violation of some parameters of the car - slightly, however, the position of the power plant, doors, the position of the connectors of the body parts is changed. In addition, the geometry of the suspension suffers. As a result of all this, the handling of the car is reduced. Therefore, if there is damage to the body, a car should be driven for diagnostics - this decision will be the most correct.

Property Tips: Why after an accident you must check the spars

If the spar is burst, the entire body design will be completely destroyed. That is why after an accident, experts primarily inspect the degree of deformation of these elements. An important role is played by the location of the spars in the car.

According to statistics, about 90 percent of the work related to this element will account for the front side member. Such damage is solved quickly only with the frame station - it is simply changed. In the frameless structures, sometimes spars simply cannot be replaced. If it was slightly remembered during the accident, the damage is corrected using a special booth-Caroline. For example, on the stand there is a left front side member and right - mechanics with a convenient location measure all the parameters needed to correct the problem.

But it also happens that the spars are not refundable, so the only way out is replacement. The change of elements entails the change in the characteristics of the entire body, because the weight, material and form of the product is calculated by the manufacturing company - the automotive centers have to improvise. If the state of the main parts of the spar is normal, a partial replacement is made using arc gas welding.

When repairing, insist that the new spar in the mass and size is not more old. Some drivers prefer to strengthen a new one, however, remember that such a solution is able to lead to loss of depreciation properties. Permanent strikes lead to more complex consequences.