What is bumper beam?

In automotive industry, bumper beams are used as shock absorbing parts. They are attached to the front and rear ends of motor vehicles by means of brackets, which act as crash-boxes by taking the loads mainly in the axial direction. Their effectiveness under such impact loads is called crashworthiness.

What are bumper beams made of?

The bumper beam material today is mostly steels and aluminum alloys, but carbon fiber composites have the potential to reduce the bumper weight significantly.

Why PP is used for bumpers?

It’s this quality that makes PP a viable alternative to plastics like Acetal. Also, when compared to other plastics, PP has a higher melting point, making it safe to use in conjunction with hot temperatures. In the automotive industry, PP’s commonly used for bumpers, chemical tanks, cable insulation, and gas cans.

What is the bumper metal called?

Bumpers of most modern automobiles have been made of a combination of polycarbonate (PC) and acrylonitrile butadiene styrene (ABS) called PC/ABS.

Are car bumpers plastic or fiberglass?

What are bumpers made of? Bumpers on today’s cars generally consist of a plastic cover and underneath, a reinforcement bar made of steel, aluminum, fiberglass composite, or plastic.

Are bumpers made of steel?

Most OEM bumpers are made out of plastic and feature an aluminum or steel reinforcement bar hidden in the middle. Some bumpers may also contain polypropylene in order to help absorb energy during an impact.

Are plastic bumpers good?

Plastic is also considered to be safer than metal as a bumper material since plastic does a better job of absorbing an impact during an accident. This may sound bad, but when your plastic bumper dents or cracks, it is absorbing the impact energy that would otherwise get transferred to you.

Which is better ABS or PP?

In general, polypropylene has a lower density than ABS, but it also has a lower melting point. Of the two filaments, ABS is the most affordable and is easier to find. Both thermoplastics suffer from curling and warping issues that can be counteracted with either additives or enclosed chambers.

Why bull guards are banned?

Bull bars and crash guards have been banned under Section 52 of the Motor Vehicles Act. They may also affect effective functioning of sensors of air bags meant for protecting passengers. They cause severe damage to the chassis of other vehicles, in case of a collision, and thereby increase the chances of fatalities.

What is a 5 mph bumper?

9. What is a 5 mph bumper? Five miles per hour is a benchmark, an impact speed at which bumpers could easily — but generally don’t — prevent all but very minor cosmetic damage in barrier tests.

What is the plastic piece under the front bumper called?

air dam
That’s why some automakers add a plastic strip (also called a front lower valance or air dam) to the bottom of the bumper on their cars. However, these plastic strips are also vulnerable to damage, as plastic breaks easily.

Are bumpers plastic or metal?

What is the purpose of a bumper beam?

Bumper beam at the basic level is considered as a simply supported beam. It is fixed to the front chassis to absorb impact forces caused by collisions. Five methods exist for the assembly of bumper system to automobile chassis for energy absorption during crash.

What are the design criteria for bumper beam?

The basic design criteria for the bumper beam is, “Under the speed of 2.5 kmph, the bumper beam should perform same as before and after the collision.

Which is the best material for bumper beam?

Currently, most of the researches focus on the substitution of new material such as polymeric based composite to achieve higher energy absorption capacity. This research is aimed to investigate the most suitable geometry of bumper beam at conceptual design stage. To achieve this various geometry was screened by

When to use composite beam or beam curvature?

When the existing metallic vehicle bumper beam is substituted with composite beam, the beam curvature should be modified accordingly, because in composite bumper beam development, optimal choice of bumper beam curvature radius, besides improving vehicle aerodynamic and architecture, actually can give a relevant contribution to vehicle safety.