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Nonisotropic experimental characterization of the relaxation modulus for PolyJet manufactured parts

Published online by Cambridge University Press:  14 August 2014

David Blanco ,
Pelayo Fernandez  and
Alvaro Noriega
David Blanco*
Affiliation:
Construction and Manufacturing Engineering Department, ARAMO (Advanced Research in Additive Manufacturing), University of Oviedo, Campus of Gijón, Gijón 33203, Spain
Pelayo Fernandez
Affiliation:
Construction and Manufacturing Engineering Department, ARAMO (Advanced Research in Additive Manufacturing), University of Oviedo, Campus of Gijón, Gijón 33203, Spain
Alvaro Noriega
Affiliation:
Construction and Manufacturing Engineering Department, ARAMO (Advanced Research in Additive Manufacturing), University of Oviedo, Campus of Gijón, Gijón 33203, Spain
*
a)Address all correspondence to this author. e-mail: dbf@uniovi.es
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Abstract

Mechanical properties of parts constructed with additive manufacturing (AM) technologies are highly influenced by raw material and process characteristics. It is widely assumed that a certain degree of anisotropy should be expected in AM parts due to their layer-upon-layer nature. Present work focuses on the PolyJet process, where each layer is built by selective jetting of photopolymers upon flat surfaces and subsequent UV radiation curing. An extensive experimental program was carried out to find out if the so-constructed parts present viscoelastic behavior and if their mechanical characteristics also depend on part orientation. Both hypotheses have been proven true, so a viscoelastic orthotropic-like behavior shall be expected in PolyJet manufactured part. Nevertheless, a significant improvement on material properties has been found for nearly vertical building orientations. This unexpected behavior is related to a shielding effect upon UV curing caused by support material.

Keywords

polymerizationstrengthstress/strain relationship
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 17: Focus Issue: The Materials Science of Additive Manufacturing , 14 September 2014 , pp. 1876 - 1882
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

ASTM Standard F2792-12a: Standard Terminology for Additive Manufacturing Technologies (ASTM International, West Conshohocken, PA, 2012), www.astm.org.Google Scholar
Bellini, A. and Güçeri, S.: Mechanical characterization of parts fabricated using fused deposition modelling. Rapid Prototyping J. 9(4), 252 (2003).Google Scholar
Ahm, S.H., Montero, M., Odell, D., Roundy, S., and Wright, P.K.: Anisotropic material properties of fused deposition modeling ABS. Rapid Prototyping J. 8(4), 248 (2002).Google Scholar
Lee, C.S., Kim, S.G., Kim, H.J., and Ahn, S.H.: Measurement of anisotropic compressive strength of rapid prototyping parts. J. Mater. Process. Technol. 187–188, 627 (2007).Google Scholar
Soe, S.P., Martindale, N., Constantinou, C., and Robinson, M.: Mechanical characterization of Duraform® flex for FEA hyperelastic material modelling. Polym. Test. 34, 103 (2014).Google Scholar
Zeytoun, I., Levi, M., Kritchman, E.M., Eshed, D., Gothait, H., Danal, D., Bar Nathan, M., Kleinhendler, C., and Menchink, G.: Rapid prototyping apparatus. EP 2 292 413 A2 European Patent application, (2011).Google Scholar
Pilipović, A., Raos, P., and Šercer, M.: Experimental analysis of properties of materials for rapid prototyping. Int. J. Adv. Manuf. Technol. 40, 105 (2009).Google Scholar
Kesy, A. and Kotlinski, J.: Mechanical properties of parts produced by using polymer jetting technology. Arch. Civ. Mech. Eng. X(3), 37 (2010).Google Scholar
Barclift, M.W. and Williams, C.B.: Examining variability in the mechanical properties of parts manufactured via Polyjet direct 3D printing. In International Solid Freeform Fabrication Symposium, Austin, TX, 2012; p. 876.Google Scholar
Jacobs, P.F.: Stereolithography and Other RP&M Technologies: From Rapid Prototyping to Rapid Tooling (American Society of Mechanical Engineers, New York, NY, 1996).Google Scholar
Zabti, M.M.: Effects of Light Absorber on Micro Stereolithography Parts. PhD Thesis, The University of Birmingham, 2012.Google Scholar
Lovell, L.G. and Bowman, C.N.: The effect of kinetic chain length on the mechanical relaxation of crosslinked photopolymers. Polymer 44, 39 (2003).Google Scholar
Ferry, J.D.: Viscoelastic Properties of Polymers, 3rd ed.; John Wiley & Sons, Ltd.: New York, 1980.Google Scholar
Lakes, R.: Viscoelastic Materials (Cambrigde University Press, New York, 2009).CrossRefGoogle Scholar