Preliminary Design Approach for Lattice Composite Keel Beam

Application of optimal reinforcement concepts like lattice or wafer and reducing of most cost and time-consuming assembly operations based on integration of attachment fittings into composite structures provide strong opportunities for weight reduction and manufacturing costs of airframe structures. Within this work, the breakthrough manufacturing-oriented solution based on the combination of high-performance lattice design and high-productive automated process is presented. A method for the preliminary design of a composite keel beam is described to determine structural parameters of two families of ribs that meet strength and stability constraints. Finally, a case study on the design of lattice composite keel beam was formulated and solved to demonstrate the capabilities of the proposed design concept and method.