SAGGIN BORDIN, M. João Vitor (2023) Characterization of objects made with PolyJet 3D printing technology and study of different tests specimen designs to obtain a convex uniaxial tensile response PRE - Research Project, ENSTA.
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Abstract
In the teaching of medical professionals, a artificial model of a human body part is often used in the process of acquire the sensitivity and improve the skills of the surgeon to work in that specific tissue or part. The department of mechanical engineer at ENSTA, has a long therm research project to create a human mandible model with similar mechanical response and and geometrical characteristics of a real one. For this propose, the idea is to use polymers with different mechanical characteristics to represent the complex and diverse tissues of a real human mandible, and a technique of additive manufacturing (3D printing) to ensure the precision in the construction of a non-standard and multi-layer geometry as the intended one. The 3D printing technique chosen is the PolyJet technology by Stratasys. The particularities and general working principles of this series of machines will be further presented in this report, but one of the main advantage of this kind of 3D printing is the capacity to print bi-materials without a week border between than, and that is one essential characteristic for any work which intends to use bi-material to print a complete mandible model at a single time. However, it was noticed that when working with bi-materials the mechanical response of this sample do not match the expected theoretical resistance, with the difference between the values expected and the ones acquired by experimental tests increasing as the fiber size decreases. To explore the possible reasons for this observed difference, and more specifically to detect and measure a possible transition zone between one material and the other that could impact on its mechanical performance, is one objective of this research project. A second objective resides in trying to find a 2D or 3D design for a specimen to be tested in a tensile machine that gives the characteristic J-shape curve found in tensile tests of natural conjunctive tissue.
Item Type: | Thesis (PRE - Research Project) |
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Uncontrolled Keywords: | PolyJet, Stratasys, Bi-material |
Subjects: | Materials Science, Mechanics and Mechanical Engineering |
ID Code: | 9731 |
Deposited By: | João vitor SAGGIN BORDIN |
Deposited On: | 05 sept. 2023 16:42 |
Dernière modification: | 05 sept. 2023 16:42 |
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