PSI - Issue 78

Mauro Mazzei et al. / Procedia Structural Integrity 78 (2026) 1649–1656

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Finite element modelling allows structures of any shape to be analysed using beam, shell or solid elements, depending on the type of problem being studied. The analysis of the static and dynamic behaviour of the structure under study was addressed through the creation of a three-dimensional finite element model consisting of rod elements. The rod elements used for the modelling are two-node elements with six degrees of freedom at each node, three translational and three rotational. Once the lattice structure is obtained, the internal nodes must be defined as hinges, otherwise the system will be recognised as a single body. To start the static-linear analysis of the structure, only the analysis of the load actions belonging to the load case is to be selected. At this stage I was able to analyse the results and the first result that emerges is a deformed configuration, furthermore I can view the stress diagrams, in particular it can be seen that the only stress present must be the axial one (normal stress) which is represented chromatically in blue if tensile and in red if compressive both in the analysis of the reference model and on the extended structure, see Figure 6.

Fig.6 Configuration and stress diagram of the module

During the automatic generation of the form based on the proposed mathematical model, the striped elements on the hyperbolic paraboloid were also graphed, as shown in Figure 7.

Fig.7 Main module with ribbed surfaces extracted from calculation software and 3D model with extrusion

4. Conclusion The aim of the present work was to make an initial contribution to the identification of the resistance mechanisms of the elements that make up a lattice structure. The theoretical considerations on the behaviour of reticular