Journal
MATERIALS & DESIGN
Volume 76, Issue -, Pages 18-25Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2015.03.044
Keywords
Composite; Crashworthiness; SEA; Basalt fibres; Crush; Energy absorption
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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. (C) 2015 Elsevier Ltd. All rights reserved.
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