Organizer：State Key Laboratory of Explosion Science and Technology
Collaborative Innovation Center of Safety and Protection
Title： New Advances in Application of Closed Cell Aluminium Foams in Tube Structures
Reporter： A/Prof. Matej Vesenjak
University of Maribor
Time： 10:00a.m., June 6, 2017
Venue： Meeting Room, 2nd Floor, State Key Laboratory of Explosion Science and Technology
Title： Advances in Functionally Graded Auxetic Metamaterials
Reporter： Prof. Zoran Ren
University of Maribor
Time： 3:00p.m., June 8, 2017
Venue： Meeting Room, 2nd Floor, State Key Laboratory of Explosion Science and Technology
Biography：
Matej Vesenjak got his PhD in 2006 from the Faculty of Mechanical Engineering, University of Maribor, Slovenia. And from then he worked in the same university as senior researcher, assistant professor. He is currently an associate professor since 2013. His research interests include design and characterisation of advanced cellular materials with strong emphasis on computational simulations. Prof. Matej Vesenjak has published over 60 original scientific journal articles and 140 contributed conference papers. He has widely international cooperation. He gave over 50 invited lectures at foreign university. He was visiting professor of Okinawa National College of Technology form Japan in 2013 and 2014. And also since 2012 he is visiting professor of Kumamoto University from Japan.
Abstract:
The presentation will focus on developed and testing of lightweight structures filled with different cellular metals (e.g. open and closed-cell foams) for use as fillers in multifunctional construction elements. Therefore, new technologies and strategies have been also considered, with the goal to fabricate structures which are easily molded into any shape or size as per requirements, as well as to eliminate the additional joining step which is one of the main cost drivers of multi-material-design in the concurrent industry. New in-situ and ex-situ aluminium structures will be presented, wherein the joining between the filler and hollow structures is achieved during the formation of the filler (e.g. aluminium alloy foam), or by directly inserting the prepared filler into the hollow structures, respectively. This presentation will provide main results of this study in which the crush performance and deformation modes were evaluated using uniaxial compressive and three-point bending tests supported by infrared thermography. The results have shown that new structures have a superior mechanical performance ensuring a high ductility and a very good crashworthiness behaviour since they deform under compressive and bending loads without formation of cracks and without abrupt failure. The results have also indicated that a good interface bonding contributes to a more axisymmetric compressive deformation.
