Abstract
The anti-bird-strike performance of a lattice-material-infilled curved plate is investigated herein. Since automatically filling the curved structure by classical lattice material filling methods will cause a large number of manufacturing defects, a space-dependent lattice material filling method for the curved plate is firstly proposed in this paper Next, using a face-centered cubic lattice, a lattice-material-infilled test piece with a hollow ratio of 40.8% is built. The test pieces are manufactured via additive manufacturing using titanium alloy. In bird-strike experimental tests, the test pieces are crashed against gelatin birds at an impact velocity of 200 m/s. Dynamic strain gauges are used to record the crash history and the results are discussed. Furthermore, a numerical analysis to simulate the bird-strike experiment is performed. The results from the experimental tests and numerical simulation agree well. This work shows that the lattice-material-infilled curved plate yields promising bird-strike resistance. Therefore, lattice-infilled materials are feasible for protecting aerospace components against bird-strike as well as for reducing the component weight.
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