The foamed aluminum material has strong performance in absorbing impact energy, and is plastically deformed by collision, absorbing the impact force of the applied load, and can effectively protect the safety of the vehicle and the occupant. When a car with a mass of 1500kg collides at a speed of 48km/h, the impact area is calculated by 1000mm×150mm and the thickness is 20mm, then the foam aluminum can absorb 84% of the total impact energy.
At present, BMW, Mercedes-Benz, Toyota, Hyundai and other auto companies are developing foam aluminum bumper bumpers, and some companies have passed crash tests. The foamed aluminum material is heat-resistant and flame-retardant, and does not release toxic gases under heat. Therefore, the use of foamed aluminum material instead of foamed plastic or foamed resin material can improve service life and reduce maintenance, while also eliminating traditional materials in vehicles. The harmful gases generated in the accident greatly reduce the losses and casualties in traffic accidents, and also play an environmental protection role.
Aluminum foam can also be used to make sound barriers on urban rails and viaducts. The internationally recognized ideal soundproof screen has a sound absorbing function close to the noise source side and has a soundproof function as a whole. The best soundproof screen is made of foamed aluminum material, the outer side is aluminum plate veneer, the inner side is bare foam aluminum plate, with sound absorption function, it can soundproof 20~30dB. A semi-cylindrical aluminum foam and steel back or concrete back sound absorbing device has been developed for noise control of highway bridges and subways.