Engineering Transactions, 64, 1, pp. 115–131, 2016
10.24423/engtrans.346.2016

Analysis of the composite material behaviour subjected to dynamic bending using the Hopkinson bar

Abdellah MASSAQ
Ecole Nationale des Sciences Appliquées Ibn Zohr University
Morocco

Alexis RUSINEK
National Engineering School of Metz ENIM
France

Maciej KLÓSAK
Universiapolis, Ecole Polytechnique d’Agadir, The International University of Logistics and Transport in Wrocław
Poland

Abdellah BOULOUZ
Ibn Zohr University
Morocco

Lahcen KOUTTI
Ibn Zohr University
Morocco

The aim of this study is to propose an experimental approach supported by an analytical analysis for polymer materials under dynamic loading. The experimental technique of Hopkinson split pressure bar is used which allows for high impact velocities. The specimens are subjected to the three-point bending and the efficiency of the experimental technique is proved. During quasi-static and dynamic bending tests, the rupture mode is described and the evolution of the energy and the ultimate stresses as a function of the initial impact velocity is discussed. In addition, the critical impact velocity estimated above an important change in the rupture mode is observed. In order to better describe the physical phenomena encountered during the three-point bending impact, the analysis is supported by a rheological model based on a mass-spring system.
Keywords: impact velocity; three-point bending; woven composite; dynamic behaviour; shock; Hopkinson bar
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

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DOI: 10.24423/engtrans.346.2016