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Axial compression performance and failure modes of 304 stainless-steel/GFRP hybrid tubes

In this paper, three groups of 304 stainless-steel/GFRP (glass fibre reinforced polymers) hybrid tubes with different composite winding layers were fabricated using the filament winding technique and subjected to axial compression experiments to obtain the axial compressive performance and failure modes. The experimental results revealed that the failure loads of the two hybrid tubes with circumferential layers remarkably increased by 36% and 39.5% as compared to the tube with spiral layers for the same thickness of the composite layers. The diamond-shaped buckling, compression failure of resin matrix, fibre breakage, and debonding of composite layers and metal lining were observed in the process of deformation. A three-dimensional solid model based on the 3D-Hashin failure criteria with the Chang-Chang linear damage evolution law was established to simulate the strength and deformation. The results of the finite element model analysis matched well with the load—displacement curves, failure loads and modes of experimental results. The effect of different factors such as metal lining, winding angles, stacking sequences and circumferential layer contents on the axial compression performance of hybrid tubes were discussed using the finite element analysis.