DYCOMP - ECCCS – 3 2024

Mechanical Response of Composite Laminates Under Dynamic Load Conditions: Effect of Material Properties and Manufacturing Processing

  • Chairi, Mohamed (University of Messina)
  • Di Bella, Guido (University of Messina)
  • Salmeri, Fabio (University of Messina)

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In this study, the attention is to investigate the effect of fibre type, resin type, fibre alignment, manufacturing process and energy levels on the mechanical response of laminate composites under low-speed impact testing. Dynamic characterization is conducted using drop-impact tests according to DIN ISO 6603 standard. Glass and basalt fibres are employed, along with polyester and vinylester resin matrices, with a specific focus on the potential substitution of glass fibre with basalt fibres in shipbuilding structural applications. Two fibre orientations ([0°/90°] and [-45°/45°]) and two manufacturing process (manual hand lay-up and vacuum assisted resin transfer) are examined. Additionally, impact energies are applied at four levels, 40, 80, 160, and 240J, respectively. The findings indicate comparable mechanical responses between glass and basalt-fibre laminates, with glass exhibiting a slightly advantages at higher impact energies of 160 and 240J. Both resin type and manufacturing process exhibit consistent performance across samples. [-45°/45°] fibre alignment demonstrates advantages in impact resistance, particularly in the two high energy levels. Moreover, increasing impact energy correlates with enhanced impact resistance across all laminate samples. This mechanical response is supported by the predominant failure mode observed, including fibre breaking and delamination, which are especially evident at higher impact energies. In conclusion, this study demonstrates the viability of basalt fibres as a potential replacement for glass fibre in shipbuilding structures. Furthermore, the investigation highlights the varying influence of parameters such as resin type, manufacturing process, fibre alignment and impact energy.