Composite columnar structure having co-bonded reinforcement and fabrication method

摘要

A columnar structure comprises a generally hollow laminate core, an outer composite skin, and a sleeve-like reinforcement. The sleeve-like reinforcement surrounds the laminate core and is sandwiched between the laminate core and the outer composite skin for reacting compressive loads imposed on the columnar structure.

主权项

1. A columnar structure, comprising:
a composite laminate core comprising a plurality of fiber reinforced resin layers, the composite laminate core having a longitudinal orientation; an outer composite skin surrounding the composite laminate core; a first end fitting positioned at a first end of the columnar structure; a second end fitting positioned at a second end of the columnar structure; and a band comprising:
a single cylindrical sleeve encircling the composite laminate core between the outer composite skin and the composite laminate core, the single cylindrical sleeve comprising a plurality of corrugation ridges that are inwardly facing relative to the columnar structure and that are parallel to each other along the longitudinal orientation, the single cylindrical sleeve further comprising a plurality of sections between the plurality of corrugation ridges, the plurality of sections having a first curvature matching a second curvature of the outer composite skin, wherein the plurality of corrugation ridges have a third curvature inverted relative to the first curvature and the second curvature such that the plurality of corrugation ridges are are pressed into and depress portions of the composite laminate core, and wherein the plurality of sections abut both an outer face of the composite laminate core and an inner face of the outer composite skin.