Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Mechanical Properties of Additive Manufactured Polymer Materials

적층조형 폴리머 재료의 기계적 물성 연구

  • Kim, Dongbum (Dept. of Mechanical Engineering, Chungbuk Nat'l Univ.) ;
  • Lee, In Hwan (Dept. of Mechanical Engineering, Chungbuk Nat'l Univ.) ;
  • Cho, Hae Yong (Dept. of Mechanical Engineering, Chungbuk Nat'l Univ.)
  • Received : 2015.02.12
  • Accepted : 2015.05.07
  • Published : 2015.08.01
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Abstract

Traditionally, additive manufacturing (AM) technology has been used to fabricate prototypes in the early development phase of a product. This technology is being applied to release manufacturing of a product because of its low cost and fast fabrication. AM technology is a process of joining materials to fabricate a product from the 3D CAD data in a layer-by-layer manner. The orientation of a layer during manufacturing can affect the mechanical properties of the product because of its anisotropy. In this paper, tensile testing of polymer-based specimens were built with a typical AM process (FDM, PolyJet and SLA) to study the mechanical properties of the AM materials. The ASTM D 638 tensile testing standard was followed for building the specimens. The mechanical properties of the specimens were determined on the basis of stress-strain curves formed by tensile tests. In addition, the fracture surfaces of the specimens were observed by SEM to analyze the results.

적층조형(additive manufacturing, AM)은 액체, 고체 상태인 폴리머, 금속 등의 재료를 층층이 쌓아서 3 차원 형상을 제조하는 기술이다. AM 기술은 제품 개발 초기단계에서 시제품 제작에 주로 사용되었으나, 최근 들어 이를 실제 제품제작에 적용하는 것에 대한 관심이 높아지고 있다. 한편 AM 기술에서 적층방향은 최종성형품의 기계적 물성에 영향을 줄 수 있다. 따라서 본 연구에서는 폴리머 재료를 사용하는 대표적인 AM 기술인 FDM, PolyJet 그리고 SLA 방식으로 제작되는 재료의 기계적 물성을 실험을 통해 파악하여 보았다. 이때 시험편의 형상은 ASTM D 638 을 참고하였고 적층방향을 달리하여 성형하였다. 시험편의 인장시험으로부터 얻은 응력-변형률 선도를 바탕으로 기계적 물성을 조사하였다. 또한 시험편의 파단부를 SEM 촬영하여 물성차이의 결과를 분석하였다.

Keywords

References

  1. ASTM F2792-12a, 2012, "Standard Terminology for Additive Manufacturing Technologies," ASTM International.
  2. Noorani, R. I., 2005, "Rapid Protyping: Principles and Applications," John Wiley & Sons, inc., Los Angeles.
  3. Manas, D., Manas, M., Stanek, M. and Danek, A., 2008, "Improvement of Plastic Properties," Archives of Materials Science and Engineering, Vol. 32, No. 2, pp. 69-76.
  4. Mudge, R. P. and Wald, N. R., 2007, "Laser Engineered Net Shaping Advances Additive Manufacturing and Repair," Welding Journal, Vol. 86, No. 1, pp. 44-48
  5. Gausemeier, J., Echterhoff, N. and Wall, M., 2013, "Thinking Ahead the Future of Additive Manufacturing-Exploring the Research Landscape," University of Paderdorn. pp. 17-35
  6. Dickerson, K., 2014, "NASA Is Building the World's First 3D-Printed Space Cameras," SPACE.COM, http://www.space.com/26769-first-3d-printed-spacecameras.html
  7. Boulton, C., 2013, "Printing Out Barbies and Ford Cylinders," The Wass Street Journal, Dow Jones & Company, Inc., http://www.wsj.com/articles/SB10001424127887323372504578469560282127852
  8. Lee, I. H., Oh, S. T., Kim, H. C. and Cho H. Y., 2014, "Development of Hybrid Fused Deposition Modeling System for Three-Dimensional Circuit Device Fabrication," Trans. Korean Soc. Mech. Eng. A, Vol. 38, No. 8, pp. 869-874. https://doi.org/10.3795/KSME-A.2014.38.8.869
  9. Kim, H. C. and Yun, H. Y., 2014, "Application of 3D Printing Technology in Nano/Micro Field," Journal of the KSME, Vol.54, No.4, pp. 36-40.
  10. Ogden, S. and Kessler, S., 2014, "Anisotropic Finite Element Modeling of the Fused Deposition Modeling Process," Characterization of Minerals, Metals, and Materials, pp. 235-243.
  11. Novakova-Marcincinova, L. and Novak-Marcincin, J., 2013, "Verification of Mechanical Properties of ABS Materials Used in FDM Rapid Prototyping Technology," Proceedings in Manufacturing Systems, Volume 8, Issue 2, ISSN 2067.
  12. Barclift, M. and Williams, C. B., 2012, "Examining Variability in the Mechanical Properties of Parts Manufactured by Polyjet Direct 3D Printing," in Proceedings of the Solid Freeform Fabrication Symposium, Austin, TX.
  13. Quintana, R., J-W Choi, K. Puebla, and R. Wicker, 2010, "Effects of Build Orientation on Tensile Strength for Stereolithography-Manufactured ASTM D-638 Type I Specimens," International Journal of Advanced Manufacturing Technology, Vol. 46, No. 1-4, pp. 201-215. https://doi.org/10.1007/s00170-009-2066-z
  14. Swetly, T., Stampfl, J., Kempf, G. and Hucke, R.-M., 2014, "Capabilities of Additive Manufacturing Technologies (AMT) in the Validation of the Automotive Cockpit," Forum fur Rapid Technologie RTejournal, Vol. 2014, Iss. 1.
  15. ASTM D 638, 2010, "Standard Test Method for Tensile Properties of Plastics," ASTM International.
  16. http://www.stratasys.com/-/media/Main/Secure/System_Spec_SheetsSS/DimensionProductSpecs/Dim1200esSellSheet-INTL-ENG-10-13%20WEB.pdf, Dimension 1200es.
  17. http://www.wmboundsltd.com/v/vspfiles/Eden250.pdf, Eden2501.
  18. http://www.ceptech.co.kr/download.php?dnfile=ProJet%206000%207000.pdf&file=../site/files_upload/1941914743539004e0ad709.pdf, ProJet(R) 6000 & 7000 and SL materials.
  19. http://www.stratasys.com/-/media/Main/Secure/Material%20Specs%20MS/Fortus-Material-Specs/Fortus-MS-ABSplus-01-13-web.pdf, Materials of Dimension 1200es.
  20. http://www.rapidtech.org/images/pdfs/materials/objetfullcure-835-data-sheet.pdf, Materials of Eden 250.
  21. Callister, W. D.. Jr. and Rethwisch, D. G., 2007, Materials Science and Engineering: An Introduction, 7th Edition, Wiley, New York, Chapter 6, 8, 14, 15, 16.
  22. Longmei Li, Q. Sun, C. Bellehumeur1, and P. Gu, 2001, "Composite Modeling and Analysis of FDM Prototypes for Design and Fabrication of Functionally Graded Parts," Solid Freeform Fabrication Symp., Austin, TX, Aug, pp. 1-8.
  23. West, M., Arbegast, W., Boysen, A. and Parker, E. M., 2010, "Eliminating Voids in FDM Processed Polyphenylsulfone, Polycarbonate, and ULTEM 9085 by Hot Isostatic Pressing," Minerals, Metals and Materials Society/AIME, USA, Feb 14-18.

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