Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8055647 | Acta Astronautica | 2018 | 20 Pages |
Abstract
To get strong, stiff and light cylindrical shell, carbon fiber reinforced hierarchical orthogrid stiffened cylinders are designed and fabricated. The cylinder is stiffened by two-scale orthogrid. The primary orthogrid has thick and high ribs and contains several sub-orthogrid cells whose rib is much thinner and lower. The primary orthogrid stiffens the bending rigidity of the cylinder to resist the global instability while the sub-orthogrid stiffens the bending rigidity of the skin enclosed by the primary orthogrid to resist local buckling. The cylinder is fabricated by filament winding method based on a silicone rubber mandrel with hierarchical grooves. Axial compression tests are performed to reveal the failure modes. With hierarchical stiffeners, the cylinder fails at skin fracture and has high specific strength. The cylinder will fail at end crushing if the end of the cylinder is not thickened. Global instability and local buckling are well restricted by the hierarchical stiffeners.
Related Topics
Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Hao Wu, Changlian Lai, Fangfang Sun, Ming Li, Bin Ji, Weiyi Wei, Debo Liu, Xi Zhang, Hualin Fan,