PSI - Issue 53

Reza Ahmadi et al. / Procedia Structural Integrity 53 (2024) 97–111 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Figure 14.Temperature evolution vs applied stress during static tensile test for notched specimens with two hole.

(b) Second level

(a) First level

Figure 15.Thermal contour to show damage initiation in notched specimen with two hole. (a,b)

4.2. Finite element analysis The analysis featured a detailed model utilizing the Ansys Composite Module (ACP) to represent properties, with the primary aim of simulating the static tensile testing of specimens made from 3D printed PLA material. The geometric representation was meshed and subsequently integrated into the static structural system. Furthermore, ACP was employed to replicate the layering process observed in 3D printed PLA specimens, and a model for evaluating tensile strength was developed. This encompassed the definition of stacking sequences, factors such as infill patterns, build orientation, raster angles, and material thicknesses. The model consisted of seventy layers, yielding a cumulative thickness of 7 mm. In this model, Figure 16 illustrates the structural organization of the individual layers of the specimen, providing insight into the orientation of the filling layers. To ensure accuracy in the simulation results, a tailored material library is established in ANSYS Workbench. This library is based on experimental data obtained from physical tests, ensuring that the material's properties are accurately represented in the simulation. Further refinements were carried out on the mesh generation and element size to optimize the accuracy of the analysis around the notches.