Indentation Study of Foam Sandwich Structures Reinforced by Fiber Columns

Abstract

Static indentation responses of foam sandwich beams and plates reinforced by fiber columns are investigated experimentally and theoretically. Based on the superposition principle, a new model is established for predicting the indentation response of sandwich beams. It should be pointed out that this model does not need to calculate the strain energy stored in the structure, which is usually difficult to be determined. For traditional foam sandwich beams and foam sandwich beams reinforced by fiber columns, the analytical predictions of indentation behaviors well agree with experimental measures. Furthermore, the analytical solution of indentation response of foam sandwich plate reinforced by fiber columns is derived by the principle of minimum energy and is compared well with experimental results.

Design, fabrication, and dynamic mechanical responses of fiber‐reinforced composite lattice materials

“…Pultruded glass and carbon tow rods are implanted in the foam core to build a 3D truss network in the noncontinuous interweaving approach for a Z-pin reinforced core. 17 The struts formed by the noncontinuous intertwining method are unable to transfer load among themselves. This causes a relative instability of the pins under loading, eliminating some of the structural gains due to the reinforcement.…”

“…Traditionally, reinforcing structural members such as pins have been utilized to improve the mechanical properties of classical foam core sandwich structures, which frequently display poor transverse stiffness and catastrophic core compressive failure. Pultruded glass and carbon tow rods are implanted in the foam core to build a 3D truss network in the noncontinuous interweaving approach for a Z‐pin reinforced core 17 . The struts formed by the noncontinuous intertwining method are unable to transfer load among themselves.…”