Changes to the vehicle body 2.
increases the strength and rigidity of the vehicle body intermediate position. To enhance the rigidity of the entire vehicle body, preventing deformation of the vehicle body when a side impact occurs, the cross-sectional area to expand a vehicle body pillar and sill plate, add or increase, thickening the reinforcing plate (FIG. 17). On the other hand, also possible to use a thinner body outer panel to reduce the overall mass of the vehicle.
17
Injury beam
1. Damage and deformation of beams
If the front beam-body of the vehicle or the rear portion by the impact, the majority of impact force will be absorbed in the beam during deformation. A beam-body deformation characteristics, even if the impact is from the front portion of the vehicle body, but the entire beams are likely to be deformed, the cause of this phenomenon is independent vehicle body beam. Further, the impact of damage to the front portion of the beam may be caused to pass up the rear, because the beam is composed of a stringer of the piece of material.
the type of deformation curved beam includes a vertical, lateral bending, axial compression, distortion and deformation of the rhombic, these types of modification generally does not occur alone, but in the form of composite damage.
(1) vertical bending (FIG. 18)
18
When the front portion or the rear portion by the impact beams, girders vertical bending occurs, vertical bending stress concentration occurs mainly in the girders.
(2) lateral bending (FIG. 19)
19
When the front or rear beam in the forward or side when subjected to impact, lateral bending will occur, the stress concentration portion is deformed or large beam Liang Hengliang connection site.
(3) axially compressed (FIG. 20)
20
When the front or rear of the beam by the impact, the axially compressed and deformed. Frame type of the front or rear beam, and a front portion of the trapezoidal girder to absorb the impact force by axial compression.
(4) distortion (FIG. 21)
21
When only one wheel severe impact (e.g., when a wheels run over a large stone), beam distortion will occur. Twist beam type frame part, become distorted frame connection fulcrum point. Trapezoidal girders vehicle when only one wheel impact, often produce an overall distortion.
(5) rhomboidity (FIG. 22)
22
rhomboidity also referred ldquo; rdquo ;, parallel deformation such deformation generally occur during the offset collision, then the impact is only one side of the stringer in front and rear. Many variations are diamond-shaped in a trapezoidal beam occurs because of the trapezoidal beam stringer is composed of a piece of material. Most striking incidents belong to offset the impact. (Continued)
(Qiu Lin)