PSI - Issue 28

M.P. Silva et al. / Procedia Structural Integrity 28 (2020) 2235–2244 Author name / Structural Integrity Procedia 00 (2019) 000–000

2242

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impact energies, the difference observed between control samples and after 13 J of impacted energy is around 56 %, 20 % and 10 % for flax, 1x hybrid and 2x hybrid laminate, respectively.

0 1 2 3 4 5 6 0 6 12 18 24 30 36 Flax 1x Hybrid 2x Hybrid

Elastic Energy [J]

Impact Energy [J]

Figure 5 – Penetration threshold for flax, 1x hybrid and 2x hybrid laminate composites.

a)

b)

c) Figure 6 – Pictures of the front (left) and back face (right) of the damaged laminates with: a) flax, b) 1x hybrid c) 2x hybrid at 11 J impact energy.