## 1 Introduction
In the case of MEX-produced parts, dimensional tolerances seem to have impacts such as affecting the layer height, which affects the topology component of its specific position in the printing press. Additionally, the height of the layer and the rate of deposition are affected by the required product quality. Similarly, manufacturing characteristics are affected by the target cost, for example, by minimizing printer size and decreasing production support. The accurate simulation of components produced with MEX means knowing in advance how the material behaves based on the manufacturing specifications and the final product requirements. In addition, to complete the validation process after obtaining the experimental information, it is necessary to know the best way to process the experimental information in FEM software so that the simulation results can be completely in accordance with the experimental behavior of those materials. [PERSON] et al. [34] proposed a model for simulating MEX components that links finite element analysis (FEA) simulation to physical experiments. They determined that choosing the appropriate direction to manufacture a part is important; moreover, the nozzle diameter, slice height, and the diameter of the extruded filaments can seriously affect the anisotropy of MEX-produced parts. To assess the possible impact of compressive loading on the ES of the MEX-produced cellular PLA specimens with two different ILDs of 1.6 mm and 2.4 mm, [PERSON] et al. [35] carried out research on cycling loading and analyzed the impact of such a loading on the part's mechanical properties. To this aim, in the published research, each sample was subjected to 10 cycles of distinct compressive loading to a definite amount of displacement ranging from 0.2 to 0.5 mm (Figure 1). The results of [PERSON] et al. [35] demonstrated an enhancement of the ES of the sample with the ILD of 1.6 mm for 7.5% after the initial 10 cycles by compressive cycling loading with a starting nominal displacement of 0.2 mm, resulting in observing the most significant variation after the second loading cycle. Furthermore, a rise of 8.4% in the ES of the sample was revealed by comparing the impact with the mentioned samples with the 2.4 mm ILD. Regarding cycling loading from a starting displacement of 0.4 mm, in which the increase in the ES of the sample was 10.2% and 9.8% for an ILD of 1.6 mm and 2.4 mm, respectively, ES changes were shown to be more pronounced. Finally, the ES of the sample for 11% had its most significant increase after 20 loading cycles from an initial nominal movement of 0.4 mm at 1.6 mm ILD. This study aims to validate the experimental results of altering the elastic stiffness of the polymer structure by using numerical simulations. These validation results open new capabilities for the optimization of polymer lightweight parts. This way of using a deliberately deformed polymer structure is a new model not yet observed in the scientific literature; it is expected to be of help in engineering structures in lightweight materials. In the present numerical simulation, a model with 2.4 mm ILD is researched. The results from the numerical simulation of the polymer structure produced by additive manufacturing closely match the experimental results. Therefore, it is possible to alter the elastic stiffness by loading-unloading. Figure 2 summarizes the research.