Static and dynamic mechanical response of different cork agglomerates

Abstract Cork is a natural cellular material capable of withstanding considerable amounts of energy and exhibiting a viscoelastic return to its original shape. This feature is particularly interesting to resist to successive impacts. In this study, the behavior of different types of agglomerated cork (AC) and expanded cork (EC) is investigated under static and dynamic loadings. Double impact was carried out on the samples using a hemispheric actuator. The peak acceleration data for all compounds were further analyzed. Static compression tests gave an interesting insight into the stress–strain curve of agglomerates and Poisson’s ratio variation during deformation. Results demonstrate a clear influence of agglomerated density and grain size on the resulting mechanical properties and point out a tremendous potential for this sustainable material to be tailored to fit diverse crashworthiness applications.

[1]  E. Barbero,et al.  Experimental study of agglomerated-cork-cored structures subjected to ballistic impacts , 2011 .

[2]  Filipe Teixeira-Dias,et al.  Cork composites for the absorption of impact energy , 2013 .

[3]  D. Kakogiannis,et al.  Behaviour of sandwich structures with cork compound cores subjected to blast waves , 2013 .

[4]  J. Cirne,et al.  Dynamic axial crushing of short to long circular aluminium tubes with agglomerate cork filler , 2007 .

[5]  Manuel A. Fortes.  Cork and corks , 1993 .

[6]  NJ Mills,et al.  Polymer Foams Handbook: Engineering and Biomechanics Applications and Design Guide , 2007 .

[7]  Paula Sousa.  Upgrading of suberin from cork and birch outer bark , 2011 .

[8]  Santiago Hernández,et al.  Static and dynamic axial crushing analysis of car frontal impact hybrid absorbers , 2013 .

[9]  Helena Pereira,et al.  Cork : biology, production and uses , 2007 .

[10]  Mariana Paulino,et al.  An energy absorption performance index for cellular materials – development of a side-impact cork padding , 2011 .

[11]  M. T. Nogueira,et al.  The poison effect in cork , 1989 .

[12]  Gérard Gary,et al.  Experimental study of the quasi-static and dynamic behaviour of cork under compressive loading , 2007 .

[13]  Helena Pereira,et al.  Effect of density on the compression behaviour of cork , 2014 .

[14]  Joel Oliveira,et al.  Mechanical performance of asphalt mixtures produced with cork or rubber granulates as aggregate partial substitutes , 2013 .

[15]  H. Pereira,et al.  Effect of fungal colonization on mechanical performance of cork , 2006 .

[16]  J. Wolfenstine,et al.  Effect of Fe on the cycle life of Cu6Sn5 anodes , 2002 .

[17]  Antonio Macías-García,et al.  Bending strength of black and composite agglomerates of cork , 2003 .

[18]  Filipe Teixeira-Dias,et al.  New composite liners for energy absorption purposes , 2013 .

[19]  Fábio A. O. Fernandes,et al.  Modelling impact response of agglomerated cork , 2014 .

[20]  Fábio A. O. Fernandes,et al.  Finite element analysis of helmeted oblique impacts and head injury evaluation with a commercial road helmet , 2013 .