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Different incident impact energy levels were used and, for both sandwiches, the maximum load, displacement or elastic recuperation shows to be very dependent of the impact energy. Mathematical relationships are proposed to estimate the maximum impact force and displacement, based on the total impact energy and impact bending stiffness. Finally, sandwiches enhanced by nanoclays presented higher maximum impact loads, lower displacements, the best performance in terms of elastic recuperation and maximum residual flexural strength.<\/jats:p>","DOI":"10.1177\/0731684413478993","type":"journal-article","created":{"date-parts":[[2013,3,22]],"date-time":"2013-03-22T23:48:53Z","timestamp":1363996133000},"page":"898-906","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":31,"title":["Impact response of sandwich composites with nano-enhanced epoxy resin"],"prefix":"10.1177","volume":"32","author":[{"given":"PNB","family":"Reis","sequence":"first","affiliation":[{"name":"Depart. of Electromechanical Engineering, University of Beira Interior, Covilh\u00e3, Portugal"}]},{"given":"P","family":"Santos","sequence":"additional","affiliation":[{"name":"Depart. of Electromechanical Engineering, University of Beira Interior, Covilh\u00e3, 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