Pic. 8.1. Mazda 3 car body frame: 1 - body frame; 2 - front bumper amplifier; 3 - casing panel
Main characteristics
The body shell is designed to increase rigidity and reduce impact on the body, thus improving safety. Collapse zone, H-shaped design (triple H design), absorbs impact energy and prevents injury to passengers. The steel bumper reinforcement also serves to improve safety. The use of a polymer casing panel increases maintainability.
Warp zone
To reduce damage to the passenger compartment, the front and rear frames are designed to deform upon impact and effectively absorb/dissipate the impact energy.
In moderate frontal collisions in the bumper reinforcement area, the impact is dissipated to the front side frames and front suspension elements.
Pic. 8.2. Body deformation zones: 1 – collision energy; 2 - front bumper amplifier; 3 – front side frame; 4 - front cross member; 5 - caisson; 6 - side longitudinal beam; 7 - front V-shaped frame
If the collision occurs close to the passenger compartment, the impact energy is dissipated by the side rails and front B-frames through the box, reducing the impact on the passenger compartment.
Cabin
Pic. 8.3. Car cab: 1 - roof reinforcement; 2 - central pillar; 3 - side longitudinal beam; 4 - cross member No. 2; 5 - cross member No. 3; 6 - shockproof beam of the front door; 7 - shockproof beam of the rear door; 8 - collision energy
Floor, side frame and roof form three rigid, H-shaped frames (triple H design), which resist the impact force in the event of a side collision. Steering stability is improved by preventing body roll.
Radiator Frame Panel
Pic. 8.4. Radiator Frame Panel
The radiator frame panel is made of durable glass fiber polymer.
Front bumper reinforcement
Pic. 8.5. Front bumper reinforcement
A large cross-section profile is used to increase strength. The frame and connection area have a deformable design. In light collisions, the impact is absorbed and dissipated, reducing the impact force on the frame and other elements.