A car bumper should be made up of something that is elastic at the same time having enough strength to survive an impact and remain undamaged. A fully metal body, in that case, will not be that ideal as metal is hard and it will pass the impact to the other parts of the body of the car instead of absorbing the impact and the car’s body will get damaged easily. A fully plastic or rubber body will be perfect in absorbing the impact and remain undamaged due to their high elasticity. But plastic or rubber is not that durable and cannot provide the finishing look to the car. Here comes the latest technology, the aluminium foam.
It is a porous and elastic material, lighter than solid aluminium yet stronger than steel, often regarded as “ultra high-strength metal matrix composite foam.” The foam may also be beneficial for aerospace or transportation purposes.
Cymat Technologies is one of the well-renowned companies that have worldwide rights to manufacture and sell proprietary Stabilized SAF Aluminum (SAF) products in most of the industrialized nations of the world.
Such organizations manufacture aluminium-based foam across an extensive array of thicknesses and densities which results in the production of fully customized products across its 3 major markets: automotive, architecture and blast mitigation. SAF is a versatile and cost-effective material for use in a broad range of military, automotive, industrial, and architectural applications.
A car bumper is meant for absorbing shock or impact at a low velocity such as accidentally hitting an emerging, pointed part while reversing the car. Here the bumper of the car should have the ability to absorb the impact either by almost nullifying the effect or by reducing the effect of the strike. That is why the bumper has to be made with such a material which is shock absorbent, elastic, durable and stretchable. The latest inventions say that the aluminium-based foam has all these qualities and it is lighter than aluminium but stronger than steel. It provides durability similar to that of stainless steel. This highly durable material is formed by an advanced mechanism called powdered metallurgy. The foam is 1/3 the density of solid steel, that can absorb up to 80 times as much energy over the same volume. This is also an advantage over other types of metal foam, where variations in cell size and thickness of the cell walls are the reasons for uneven deformation under stress.
Finally, we can come to the conclusion that aluminium-based foam is the material of today which is strong, durable, elastic and light and is perfect for absorbing shock effects and high impacts caused due to accidents. That is why we can say that it is the best material for the car bumper.