Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures
TypeArticles dans des revues avec comité de lecture
Sandwich composites with fibre reinforced plastic (FRP) facesheets have emerged as a major class of lightweight structural materials in a wide range of engineering fields including aerospace, automotive and marine structures. This is due to attractive mechanical properties such as high specific stiffness and high strength. However, sandwich structures are susceptible to damage caused by impact. The objective of this paper is to evaluate the dynamic response of sandwich composites based on Kevlar fibre reinforced epoxy and Rohacell foam. The improvement in impact performance of these sandwich structures that can be achieved by the addition of nanoparticles in the resin matrix is investigated. Nanostrength, an acrylate triblock copolymer that self-assembles in the nanometer scale is added to the epoxy matrix. The effect of the nano-reinforcements on flat sandwich plates under low velocity impact is investigated at different scales. An instrumented drop tower setup is used for the low velocity impact tests of the sandwich plates with neat or nano-reinforced epoxy matrix, at different energies. The macroscopic response of the sandwich structure and the microscopic phenomena involved in dissipating the impact energy are identified and compared for sandwich plates with and without nanoparticles.
Showing items related by title, author, creator and subject.
DONNARD, Adrien; GUERARD, Sandra; MAHEO, Laurent; VIOT, Philippe; RIO, Gérard (Elsevier, 2018)Cellular materials such as polymeric foams in particular have been widely studied under uniaxial loading conditions. Many experimental studies have been focusing recently, however, on the responses of these foams to ...
Biomechanical evaluation of four femoral fixation configurations in a simulated anterior cruciate ligament replacement using a new generation of Ligament Advanced Reinforcement System (LARSTM AC) BARBIER, Olivier; GUERARD, Sandra; BOISRENOULT, Philippe; THOREUX, Patricia (springer, 2015)Background Recent improvements in manufacturing of biomaterials have made available a new generation of artificial ligaments with better biocompatibility and design that have led to a new interest in using them for ACL ...
GUERARD, Sandra; BAROU, Jean-Luc; PETIT, Julien; POISSON, Philippe (2014)This study examined whether the thermo-modeling process suits the thermal properties of the material constituting mouthformed mouthguards (MGs). Five mouth-formed MGs were compared: four commercially available MGs (SDITM, ...
HAUPERT, Sylvain; GUERARD, Sandra; MITTON, David; PEYRIN, Françoise; LAUGIER, Pascal (Acoustical Society of America, 2012)Accumulation of bone microdamage is suspected to lead to severe impairment of mechanical properties with an increase in skeletal fragility and fracture risk. The objective of the study was to evaluate the sensitivity of ...
Semi-automated stereoradiographic upper limb 3D reconstructions using a combined parametric and statistical model: a preliminary study LEBAILLY, Fréderic; LIMA, Lucas; CLAIREMIDI, Alain; AUBERT, Benjamin; GUERARD, Sandra; CHAÏBI, Yasmina; DE GUISE, Jacques; FONTAINE, Christian; SKALLI, Wafa (springer, 2012)PURPOSE: Quantitative assessment of 3D clinical indices may be crucial for elbow surgery planning. 3D parametric modeling from bi-planar radiographs was successfully proposed for spine and lower limb clinical investigation ...