Study on progressive damage performance of basalt‐fiber wound composite tube

Abstract For filament wound composite tubes made of basalt fiber‐reinforced polymer (BFRP), damage performances were simulated and load capacity was evaluated with a multi‐scale homogenization method based on properties of component materials, fiber volume fraction and the winding process. Considering about both the intra‐layer and inter‐layer damage properties, a representative volume element (RVE) was defined in the structural layer of the pipe wall firstly. Equivalent mechanical properties of the structural layer were then obtained by simulating damage evolution of the RVE under tension, compression and the shear load. In order to verify the RVE model, tensile tests of the specimens that were cut out of the BFRP tube in both longitudinal and circumferential directions were implemented. The predicted load–displacement curves of the RVE were in good agreement with the corresponding experimental results. Finally, the tube wall was simplified into a three‐layer structure including inner lining layer, equivalent structural layer and outer protection layer. Damage evolutions of the tube were calculated under basic loads, borne typically by the oil and gas pipeline, such as internal pressure, tension, bending and torsion. The results lead to a better understanding of the load‐bearing capacity of the BFRP tube and promote the application of the BFRP in the oil and gas field.