Finite element analysis of effects of core structures on compression-resistance of fiber reinforced composites

In order to explain the effects of core structures on the mechanical behavior of hollow fiber reinforced composites,the dynamic responses of π-shaped and O-shaped core structural fiber reinforced composites under the same compression loading condition were compared by finite element analysis( FEA) based on yarn core and resin. Comparative analysis of the deflection-time curves, structural stress distributions,locations of maximum and minimum stress and equilibrium degree of stress of the two types of composites showed that the deflection magnitude of the O-shaped core composite was obviously less than that of the π-shaped core composite. Moreover,for the O-shaped core composite,its stress concentration region located at the symmetrical central line of geometrical structure,which was very beneficial to the overall loading-bearing behavior of the composite structure. In addition,it may reduce the non-equilibrium degree of the stress and hence can absorb and dissipate more energy.