Abstract
To make anisogrid structures further lighter, the flanges of the anisogrid sandwich structures were made of carbon fiber reinforced composite (CFRC). To fully utilize the tensile property of the carbon fibers, filament winding method was adopted to guarantee the rib fibers continuously extended to the flanges. To improve the stretching behavior of the composite flange, two chamfering styles at the flange corner were proposed. Flange with right-angle chamfering has serious stress concentration and fails at delamination. The tensile strength is much lower than the compression strength. Adopting arc chamfering, the stress concentration at the corner of the flange is greatly reduced. The panel fails at skin fracture and the tensile strength is much greater than that of the flange with right-angle chamfering, even greater than the compression strength.
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