Reference : Open-Cell Aluminium Foams with Graded Coatings as Passively Controllable Energy Absorbers

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Aerospace & aeronautics engineering Engineering, computing & technology : Civil engineering Engineering, computing & technology : Materials science & engineering Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Multidisciplinary, general & others
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/19431

Title :	Open-Cell Aluminium Foams with Graded Coatings as Passively Controllable Energy Absorbers
Language :	English
Author, co-author :	Jung, Anne [Saarland University > Lehrstuhl fur Technische Mechanik > > Research Fellow]
	Beex, Lars [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Diebels, Stefan [Saarland University > Lehrstuhl fur Technische Mechanik > > Professor]
	Bordas, Stéphane [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Publication date :	8-Aug-2015
Journal title :	Materials & Design
Publisher :	Elsevier
Volume :	87
Pages :	36-41
Peer reviewed :	Yes
Audience :	International
Keywords :	[en] Open-cell metal foams ; Hybrid metal foams ; Energy absorbing materials ; Functionally graded materials ; Coating ; Impact
Abstract :	[en] Compared to most bulk materials, open-cell aluminium (Al) foams (OCAFs) are light-weight and can absorb a significant amount of energy in compression, e.g. during impact.When coatedwith nickel (Ni), OCAFs can absorb even more energy, making them more appropriate for impacts at higher velocities than uncoated OCAFs. When Ni-coated OCAFs experience low-velocity impact however, the stopping distance during the impact is small compared to that of uncoated OCAFs and hence, deceleration occurs fast. This exposes devices (and possibly human beings) protected by OCAFs to large internal forces leading to internal damage. An OCAF that combines the properties of uncoated and coated OCAFs can absorb energy during both low-velocity and high-velocity impact scenarios. This contribution introduces two of such OCAFs which are created by partially and gradually coating OCAFs. The general mechanics of the two OCAFs are revealed using experimental and numerical observation methods.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/10993/19431
DOI :	10.1016/j.matdes.2015.07.165

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