Effect of beam orientation on the static behaviour of phenolic core sandwich composites with different shear span-to-depth ratios

This study thoroughly investigated the flexural behaviour of phenolic cored sandwich beams with glass fibre composite skins in the horizontal and vertical positions

Wahid Ferdous; Allan Manalo; Thiru Aravinthan

2017

Scholarcy highlights

  • The applications of fibre composite sandwich systems are rapidly increasing in civil infrastructure and construction due to their excellent durability, design flexibility, cost effectiveness, and high strength-to-weight and stiffness-to-weight ratios
  • Failure mode The typical failure modes of the sandwich beams made of glass fibre reinforced polymer skins and phenolic core are provided in Figure 2(a) to 2(h)
  • From the percentage differences between experimental and theoretical failure loads in Table 2, it can be seen that the theoretical model mostly underestimates the ultimate load when the sandwich beam fails in shear
  • The sandwich beam fails in brittle manner at horizontal orientation while the failure is progressive at vertical orientation
  • With the increase of sectional dimension but same shear span, the sandwich beam fails in similar mode at horizontal orientation but fails differently at vertical orientation
  • The sandwich beam fails in shear, a combined shear and bending, and bending for shear span-to-depth ratios of 2 or less, between 2 and 6, and 6 or more, respectively
  • The possibility of indentation failure is higher at vertical orientation than the horizontal position

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