![]() They showed that the addition of the vertical strut to the BCC architecture could at least double the values of the absorbed energy under quasi-static and dynamic conditions. reported a static and dynamic experimental analyses of steel lattice structures with two different architectures (body-centered cubic, BCC, with and without vertical support). However, the lattice core presented a damaged zone that was more localized compared to that of the sandwich structures. The mechanical performances of the two cores were quite similar in terms of absorbed energies. studied the mechanical behavior under impact of the sandwich titanium structures with honeycomb and lattice cores. This characteristic makes the lattice structures appropriate for energy absorption applications since the collapsing behavior is controlled. Unlike cellular structures that present random-oriented unit cells, the topological position of lattice structures can be preliminarily designed to model the mechanical components and optimize the mechanical performance. Many studies have compared the mechanical behaviors of lattice structures to cellular materials (or foams) since the only difference is that lattice structures present a regular repeating structure of their unit cells. These structures can be easily produced with fused deposition modeling (FDM). Thus, different material properties can be obtained by designing the spatial configuration of the cells and their diameters. The mechanical behavior of lattice structures depends on the density, unit-cell size, geometrical configurations, aspect ratio, and the rate of loading. Lattice structures present outstanding potentialities since an optimum balance of stiffness, strength, and static or dynamic behavior can be achieved by topologically combining the cells to obtain an engineered response to a specific structural problem. Indeed, these structures cannot be easily fabricated with traditional manufacturing technologies. The use of these structures for industrial applications and research activities has strongly increased in the last 10 years because of the recent advancements in additive manufacturing (AM) technologies. Lattice structures are three-dimensional open-celled structures that are topologically ordered and composed of repeating unit cells. In addition to a mass reduction of 25%, the improved crushing performances of the lattice structure are shown by the very smooth force-displacement curve with limited peaks and valleys. Based on these results, a crash absorber for the segment C vehicle was designed and compared with the standard component of the vehicle made of steel. The results showed that the specific energy absorption increases with the diameter of the beam and decreases with the size of the unit cell. In the first factorial plan, the specimen volume is constant and the dimensions of the unit cell are varied, while the second factorial plan assumes a constant size of the unit cell and the volume changes in accordance with their number. The factors were the beam diameter and the number of unit cells. Two full factorial plans of compression tests on cubic specimens of carbon nylon produced by fused deposition modeling (FDM) were performed. The goal was to identify the most influencing parameters of the unit cell on the crushing performances of the structure, thus guiding the design of energy absorbers. In this work, an experimental and numerical analysis of a lattice structure for energy absorption was carried out.
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