## 1 Introduction
[27] studied the impacts of melted sediment modeling production parameters on the tensile strength and stiffness of components made of ABS M30 and examined this question both empirically and analytically. The most important results of this research are the feasibility of predicting the mechanical behavior of the MEX parts, once the dimensions, number of contours, and raster angle have been stated. The most widely used thermoplastic materials are polyethylene, polypropylene, ABS, poly-lactic acid (PLA), high compression polystyrene resin (HiPS), polyethylene terephthalate glycol (PETG), polyamide (PA), commonly known as nylon, and polyether ether ketone (PEEK), among others [19; 28]. The most common source materials for commercially available MEX printers are ABS and PLA. PLA is a bio-plastic composed of a repetitive lactic acid chain. It can be recycled through applying conventional methods [29]. Additionally, PLA can be composed similarly to all of the other organic materials. It was observed to be one of the most important biopolymers [30] with its substantial application in the field of medicine, such as for medical implants, bone fixation and reconstruction, (bone) tissue engineering, drug delivery system, and suture material [31]. [PERSON]'s [1] research developed biocompatible and bioresorbable polymer blends and composite filaments for MEX printing. [PERSON] used two biodegradable polymers (PLA (transparent filament) and polycaprolactone (PCL)); he used an Ultimaker S5 printer with a nozzle size of 0.4 mm (AA 0.4) for printing the cylinders with 100% infill density for a compression test, with the dimensions of 6 \(\times\) 6 \(\times\) 12 mm\({}^{3}\). Afterward, compression tests were performed on dense cylinders by using a Shimadzu AGS-X materials tester to investigate the mechanical characteristics of both materials. Six to ten specimens for each type of material were used for the compression test and the stiffness (Young's modulus) and yield point were reported. [PERSON] et al. [18] presented the effect of major processing parameters on the properties of materials obtained from poly-lactic acid components modeled by MEX tested in torsion. The findings showed that the result improved with heat treatment, and the infill effect on ductility. The thickness of the layer and density of infill [32] have significant impacts on optimizing the strength of the part. Recently, for environmental reasons, biodegradable polymers such as PLA have been used instead of conventional polymers. PLA was used in biomedical applications, containers, packages, auto parts, and so on. PLA is a crystalline polymer and its Young's modulus and tensile strength are 2 to 3 GPa and 50 to 70 MPa, respectively. PLA is very brittle, and its low toughness limits the use of PLA. To improve this fragility, PLA is combined with other flexible polymers. The biocompatibility of PLA was approved for food and medicine applications because of its good mechanical properties and processing performance [21; 33]. PLA is a thermoplastic aliphatic polyester polymer derived from renewable sources. It has been considered as a potential environmentally friendly alternative to its oil counterparts. It is used for food contact, packaging, and scaffolding applications and is among the most widely used polymers, especially because of its ability to crystallize stress, heat crystallize, impact-modified, fill, copolymerize and process in most excellent polymer processing. Designing and optimizing plastic parts remains a very complex engineering challenge. Designing a new product that is more secure, for example, involves validating its mechanical behavior by numerically simulating FEM before it is built. These simulations require accurate knowledge of the mechanical properties of the material. These properties are affected by the manufacturing process as well as the mechanical effort that affects the design in the operational state.