Arrasate / Mondragón, Spain
Arrasate / Mondragón, Spain
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Esnaola A.,CIDIA | Esnaola A.,University of Mondragon | Tena I.,University of Mondragon | Aurrekoetxea J.,University of Mondragon | And 2 more authors.
Composites Part B: Engineering | Year: 2016

Semi-hexagonal glass/polyester composite structures with different fibre volume fractions have been studied for automotive crash applications. Interlaminar shear strength and specific energy absorption capability of the material have been characterised in order to analyse the effect of the fibre content. Samples with different fibre content among 40% and 60% have shown similar interlaminar shear strength values, around 35-40 MPa. It has been found that by increasing the fibre percentage from 40% to 47% the specific energy absorption values of the material increased to 56 kJ/kg. For specimens with fibre volume fraction above 47%, the total amount of energy dissipated is similar. Increasing fibre content increases the linear density of the material and in fact, the same value of dissipated energy quantities with a higher linear density implies a decrease in the specific energy absorption values. © 2015 Elsevier Ltd. All rights reserved.

Esnaola A.,CIDIA | Ulacia I.,University of Mondragon | Aretxabaleta L.,University of Mondragon | Aurrekoetxea J.,University of Mondragon | Gallego I.,CIDIA
Materials and Design | Year: 2015

Feasibility of basalt fibre composites for automotive crash applications has been analysed and compared with E-glass fibre composites in the present study. Semi-hexagonal composite structures with different stacking sequences of E-glass and basalt fibres have been tested in quasi-static crush conditions and specific energy absorption (SEA) capability has been calculated. Samples with unidirectional and bidirectional E-glass fibres have shown the highest SEA values, around 30. kJ/kg. However different deformation mechanisms of energy absorption have been observed. On the other side, basalt/polyester samples have exhibited unstable collapse due to buckling effect during crushing process. Therefore the crush behaviour of the present basalt/polyester configuration is not suitable for automotive crash applications. Regarding the hybrid configuration using E-glass and basalt fibres with polyester, it has been shown that unstable collapse problems of basalt/polyester have been avoided. However the SEA values for this configuration are lower comparing with those values obtained by E-glass/polyester configurations. Adhesion between fibre plies of different material has caused delamination with low energy absorption capability. © 2015 Elsevier Ltd.

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