Static and dynamic analysis of bending–torsion coupling of a CFRP sandwich beam

Loïc Bernard (1) , Guilhem Michon (1) , Rached El Fatmi (2) , Bruno Castanié (1)

1 ICA - Institut Clément Ader
2 ENIT - Ecole Nationale d'Ingénieurs de Tunis

The bending-torsion coupling for a sandwich beam is analysed from the static and vibrational point of view. Off-axis orientations in the skin and transverse graded core are proposed to perform the coupling. Solutions are first compared numerically from a static point of view using a complete beam theory. The natural frequencies and mode shapes are then studied experimentally and numerically. An experimental assembly test rig is presented, where a sandwich beam is embedded on the shaker and measurements are taken with a scanning vibrometer. These results are then compared to those calculated by a finite element model in order to verify the accuracy of the model and its ability to consider all the physical phenomena involved.

Domaines: Génie mécanique [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des structures [physics.class-ph]

Loïc Bernard, Guilhem Michon, Rached El Fatmi, Bruno Castanié. Static and dynamic analysis of bending–torsion coupling of a CFRP sandwich beam. Composite Structures, 2016, 145, pp.26 - 36. ⟨10.1016/j.compstruct.2016.02.055⟩. ⟨hal-01924062⟩