Research in Axis Compression Stability of Type-D Composite Tube

Composite material which is light weight, corrosion resistance, high strength, and high insulation, can be used as an ideal material in transmission tower, but lack of corresponding theoretical and experimental research. To research the stability of composite tubes, compression test is applied to total 72 pieces D-type composite tubes. The actual bearing capacity is obtained by experiment, Based on the theoretical, the compression stability calculated formula which is fit for composite tube is proposed, and the formula is modified by experimental data, the experimental process analysis using finite element method is done. The result shows that, the theoretical results calculated by the modified formula proposed in this paper, are relatively similar with finite element method results, and tested values. The result also suggest that the slenderness ratio of the composite tube does not exceed 80 in transmission tower.