1/8/2024 0 Comments Lattice structure![]() The material here used for printing is the thermoplastic polyurethane (TPU) 90A, which has hyperelastic and viscoelastic properties. An undoubted advantage of lattice structures, which are basically metamaterials since they are specifically designed to impart special physical properties normally absent in the constituent materials, is lightness, often a valuable attribute in engineering applications. have found that with additive technologies, it is possible to produce them without any support structure. Fabrication of these structures by conventional manufacturing is not trivial, but Kumar et al. The unit cells repeated with the principle of tessellation along the three principal directions constitute the resulting lattice structures ( Figure 1). In this study, the printed parts under examination were lattice structures made of the repetition of three different unit cells with the same relative density-namely, open cell, closed thin-walled cell, and closed thick-walled cell. The best parameter configurations in terms of mechanical response were then highlighted by numerical analysis. As the main result of the study, several parameters of the FDM process and their correlation were identified as possible detrimental factors of the mechanical properties by about 50% of the same parts used as isotropic cell solids. Three different configurations of lattice structures with designs developed from unit cells were analyzed both experimentally and numerically. In this study, the effects of several phenomena that influence the mechanical properties of printed lattice structures additively obtained by FDM are evaluated. Many studies are conducted to broaden the spectrum of materials used to ensure an ever-increasing use of FDM in various production scenarios. For this reason, analyzing the functional behavior of FDM parts is still a topic of great interest. On the other hand, objects obtained through this technology are mainly used for prototyping activities. Nowadays, fused deposition modeling additive technology is becoming more and more popular in parts manufacturing due to its ability to reproduce complex geometries with many different thermoplastic materials, such as the TPU.
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