Mechanical evaluation of various geometrical designs in additive manufacturing for future knee brace harness
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- Paul Modey (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
- Advisor
- Dennis LaJeunesse
Abstract: Additive manufacturing, commonly known as 3D printing, revolutionizes the realization of computer-aided designs (CAD) by layer-by-layer printing of prototypes or objects, emulating traditional modeling techniques. Also, according to ASTM standards, additively manufactured prototypes using plastics must undergo the tensile strength testing using the ASTM D638 - 14 Standard Test Method for Tensile Properties of Plastics. The objective was to fabricate and analyze the effects of different geometries on the mechanical properties of the produced meshes. I also determined the differences in mechanical properties when it comes to materials used in printing. Three different geometries (simple grid with holes, hexagonal grid, and zig-zag patterns) were printed using five different photopolymer resin types, and their tensile modulus (Young’s Modulus, YM, of Elasticity) and tensile strength were examined using a mechanical strength analyzer. Simple grid with holes (Mean YM ˜ 1.255 MPa) showed higher strength whilst the hexagonal grid pattern showed the least strength mechanically (Mean YM ˜ 0.346 MPa) Translucent photopolymer resin with average YM of 0.0.231 MPa had the highest level of flexibility but less strength. This research contributes to a deeper understanding of how geometric design and resin characteristics impact the mechanical performance of 3D-printed prototypes. By showing these relationships, this study provides valuable insights for optimizing material selection and geometric design to meet specific application needs, ultimately advancing the field of additive manufacturing.
Mechanical evaluation of various geometrical designs in additive manufacturing for future knee brace harness
PDF (Portable Document Format)
1016 KB
Created on 5/1/2024
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Additional Information
- Publication
- Thesis
- Language: English
- Date: 2024
- Keywords
- Additive manufacturing, ASTM Standard test procedure, Mechanical Testing, Stereolithography, Young's modulus
- Subjects
- Knee braces $x Design and construction
- Three-dimensional printing
- Additive manufacturing