Naslov
Experimantal and Numerical Modelling of Open-cell Cellular Structures

Autori
Vesenjak, Matej ; Krstulović-Opara, Lovre ; Öchsner, Andreas ; Ren, Zoran ; Domazet, Željko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Extended abstracts and Proceedings of the 5th International Congress of Croatian Society of Mechanics (CD) / Matejiček, Franjo - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2006, 33-34

ISBN
953-96243-5-5

Skup
International Congress of Croatian Society of Mechanics (5 ; 2006)

Mjesto i datum
Trogir, Hrvatska; Split, Hrvatska, 21.09.2006. - 23.09.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
cellular structures; open cells; experiments; computational modelling; dynamic load-ing

Sažetak
The paper describes the behaviour of regular open-cell cellular structures under dynamic com-pressive loading and the influence of the pore filler. Such materials, with their high energy absorp-tion, are of particular importance as crash absorbers where impact energy is absorbed and dissi-pated. Open-cell cellular specimens made of aluminium alloy and polymer have been experimen-tally tested with aim to determine their stiffness, and for validation of the computational models. The quasi-static and dynamic compressive loading has been applied to the open-cell cellular struc-tures in order to evaluate the strain rate sensitivity. Additionally, cellular specimens with filler material have been subjected to compressive loading. The specimens with the filler material have shown that the observed brittle behaviour at rupture has been reduced and the energy absorption increased. Such structures are also very strain rate dependent. Further investigations of the filler influence were carried out with extensive dynamic nonlinear computational simulations. Computational results of the open-cell cellular structure have shown that the influence of the filler increases with increasing the relative density. The developed computational models provide for better understanding of behaviour of such ma-terials and development of new approaches for design of open-cell cellular structures.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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