29 / 2021-09-15 20:43:04

Validation Study on Analytical Theory of Tensile Mechanical Behavior of Slender Helical Structure

Helical structure,Winding angle,Mechanical behavior,Tension

The slender helical structure is widely used in practical projects such as civil engineering, manufacturing industry and ocean engineering, such as springs, steel strands, submarine cables, umbilical cables and flexible pipelines. The helical structure used in different structures has different winding angles. For the tensile mechanical behavior of the above-mentioned different types of structures, there is still a lack of an universal theoretical solution formula. The theories of solving the tensile mechanical behavior of the slender helical structure with different winding angles are discussed firstly in this paper. Based on the curved beam theory, the stress solution formula of the slender helical structure model is deduced, and the mechanical deformation mechanism of the slender helical structure with different winding angles under the action of axial tension is studied. At the same time, based on ABAQUS, the theoretical results and numerical solutions through numerical simulation are compared, which further clarifies the deformation characteristics of the slender helical structure with different winding angles and the applicable scope of different theoretical solution methods. It is found that the slender helical structure with a smaller winding angle mainly produces torsional deformation during tension, while the tensile deformation of the cross-section of the slender helical structure with a larger winding angle plays a leading role. The internal force and stress of the slender helical structure with different winding angles tends to be symmetrical with 45 degrees as the center under the premise of the same axial strain, , which greatly reduces the amount of calculations for engineering design. The above-mentioned tensile behavior characteristics of the slender helical structure and the application range of different theoretical methods provide a useful reference for the analysis and design of helically wound structures in engineering.