Study of the Compressive Behavior of Fiber-Metal Hybrid Structures Reinforced by Jute-Glass Fibers

In this research, the compression properties of fiber-metal laminates including 2024-T3 aluminum sheet and composite of epoxy reinforced by the hybrid of Jute-glass fibers were investigated. In order to to improve the adhesion of aluminum sheets with reinforcement fibers, chemical etching was used for surface modification of this sheets. Also to improve the mechanical properties and adhesion behavior of jute fibers, alkali surface modification was performed and verified by Fourier transform infrared spectroscopy. Samples with eight different stacking sequence of jute-glass fibers were made by hand-laying up technique. Edgewise compression was performed and the maximum applied loading, compression strength, absorbed energy during failure and specific absorbed energy were calculated. Three failure modes including, buckling and debonding one of the facing metals from the fiber, columnar collapse with facing buckling in opposite directions and Euler buckling mode were observed. According to the comparison of the failure modes and the results of the edgewise compression test, it was found that Euler's buckling mode is the most favorable failure mode. Also, investigating the force-displacement and failure modes of the samples showed that hybrid sample with ordering of glass-jute-glass-jute-glass fibers has the highest compressive strength (102.1 MPa) and specific absorbed energy (1123.6 kJ/kg) and it failure (Euler Bucking mode) is multi-step and controlled.