1. Side impact beam
is well known, when the vehicle is subjected to side impact, the door is easily deformed by the impact, so that damage directly to the vehicle occupants. In order to improve the safety performance of vehicles, many car companies placed twelve very strong steel beams in the middle of automotive laminated on both sides of the door, which is often said that the side door impact bars. The role of anti-collision crash is: when the side door by the impact, strong impact beam can greatly reduce the degree of deformation of the side door, which can reduce the damage to the car crash car occupants.
According to the survey, all the cars in the collision mode, the side impact accounted for about one-third. So, how to protect the safety of the driver’s side impact is very important. Door crash as an additional energy-absorbing protection, can reduce the force from outside the passenger may suffer. Proved door beam strikes a fixed object in the vehicle (for example trees) protective effect is obvious. According to the US National Highway Traffic Safety Administration NHTSA released, door beam in 2002 saved 994 accident victims.
The door beam shape: tubular and generally divided into two kinds of hat-shaped; ends (CJK vehicle used generally tubular door beam with a bracket for fixing the connection with the door impact beam , and usual Western car door impact beam hat-shaped (generally welded directly to the door); a tubular bumper beam main pipe, also rectangular tube quincunx tube, oval tube, of course, that many factors to consider , such as a door interior space; and a cap-shaped bumper beam mainly single cap shape (U-shape) and a shape of a cap-bis (m-shaped); absorbing energy
the main door beam with several factors For:
1, structural design; the most important point is that, in general, absorbing energy of the impact beam is a hat-shaped tubular better than the impact beam; Further, the double structure is generally hat-shaped cap than single better structure; of course, there are so matched height, with a cap-shaped configuration a / B / C pillar, rocker, etc. is essential;
2, strength of the material; people often think insideThe tube is like a garden hose, it is not true; Japanese and Korean cars are generally used in the pipe tensile strength up to 1400-1600MPA (currently some domestic brand car with the more common tube), more than four times the strength of ordinary pipe which absorbing energy more than 2 times normal tube; and the tensile strength of the common Western vehicle impact beam is generally hat-shaped reached 1400MPA;
3, the thickness of the material; of course, the thicker the material , absorbing energy as possible (without regard to a B, matching the rocker / / C pillar), absorbing energy proportional to the thickness and materials.