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Investigating the behavior of laser-sintered Nylon 12 parts subject to dynamic loading

Published online by Cambridge University Press:  14 July 2014

Hoda Amel ,
Hadi Moztarzadeh ,
Jem Rongong  and
Neil Hopkinson
Hoda Amel*
Affiliation:
Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD, UK
Hadi Moztarzadeh
Affiliation:
Warwick Manufacturing Group, University of Warwick, Coventry CV4 7AL, UK
Jem Rongong
Affiliation:
Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD, UK
Neil Hopkinson
Affiliation:
Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD, UK
*
a) Address all correspondence to this author. e-mail: h.amel@sheffield.ac.uk
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Abstract

Laser sintering allows producing end-use parts directly from computer files with no tooling required. For these parts to be used in industrial applications, their mechanical properties throughout in-service applications must be examined. The aim of this article is to provide an understanding of the dynamic performance of laser-sintered Nylon 12 parts. To investigate the viscoelastic properties of the material, dynamic thermal mechanical analysis has been performed in different frequencies and temperatures. Tension–tension cyclic behavior of samples has been studied and creep is shown to have a great impact in such behavior in addition to fatigue. Stress relaxation plots are provided and compared with the cyclic loading plots validating the fact that samples experience a combination of creep and fatigue in tension–tension loading. Hysteresis loops indicate brittle crack propagation in the samples experiencing fatigue.

Keywords

polymerfatigue
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 17: Focus Issue: The Materials Science of Additive Manufacturing , 14 September 2014 , pp. 1852 - 1858
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Mallick, P.K.: Materials, Design and Manufacturing for Lightweight Vehicles (Woodhead Publishing Limited, Cambridge, UK, 2010).CrossRefGoogle Scholar
Zarringhalam, H., Hopkinson, N., Kamperman, N.F., and de Vlieger, J.J.: Effects of processing on microstructure and properties of SLS Nylon 12. Mater. Sci. Eng., A 435–436, 172–180 Nov. (2006).CrossRefGoogle Scholar
Kruth, J.P., Wang, X., Laoui, T., and Froyen, L.: Lasers and materials in selective laser sintering lasers and materials in selective laser sintering. Rapid Prototyping J. 11(1), 26–36 (2003).Google Scholar
Hague, R., Mansour, S., and Saleh, N.: Material and design considerations for rapid manufacturing. Int. J. Prod. Res. 42(22), 4691–4708 Nov. (2004).CrossRefGoogle Scholar
Goodridge, R.D., Hague, R.J.M., and Tuck, C.J.: Effect of long-term ageing on the tensile properties of a polyamide 12 laser sintering material. Polym. Test. 29(4), 483–493 Jun. (2010).CrossRefGoogle Scholar
Gibson, I. and Shi, D.: Material properties and fabrication parameters in selective laser sintering process. Rapid Prototyping J. 3(4), 129–136 (2011).CrossRefGoogle Scholar
Goodridge, R.D., Tuck, C.J., and Hague, R.J.M.: Laser sintering of polyamides and other polymers. Prog. Mater. Sci. 57(2), 229–267 Feb. (2012).CrossRefGoogle Scholar
Amado-becker, F., Díaz, R.A., and Ramos-grez, J.: Mechanical behavior of SLS components in relation to the build orientation during the sintering process as measured by ESPI. Conference Proceedings, 17th Solid Freeform Fabrication (SFF) Symposium, August 2006, Austin, Texas; 721–727.Google Scholar
Ajoku, U., Saleh, N., Hopkinson, N., Hague, R., and Erasenthiran, P.: Investigating mechanical anisotropy and end-of-vector effect in laser-sintered nylon parts. Proc. Inst. Mech. Eng., Part B 220(7), 1077–1086 Oct. (2006).CrossRefGoogle Scholar
Ajoku, U., Hopkinson, N., and Caine, M.: Experimental measurement and finite element modelling of the compressive properties of laser-sintered Nylon-12. Mater. Sci. Eng., A 428(1–2), 211–216 Jul. (2006).CrossRefGoogle Scholar
Happian-Smith, J.: An Introduction to Modern Vehicle Design (Reed Educational and Professional Publishing Ltd., Oxford, UK, 2001).Google Scholar
Mazzoli, A.: Selective laser sintering in biomedical engineering. Med. Biol. Eng. Comput. 51(3), 245–256 Mar. (2013).CrossRefGoogle ScholarPubMed
Blattmeier, M., Witt, G., Wortberg, J., Eggert, J., and Toepker, J.: Influence of surface characteristics on fatigue behaviour of laser sintered plastics. Rapid Prototyping J. 18(2), 161–171 (2012).CrossRefGoogle Scholar
Van Hooreweder, B., Moens, D., Boonen, R., Kruth, J-P., and Sas, P.: On the difference in material structure and fatigue properties of nylon specimens produced by injection molding and selective laser sintering. Polym. Test. 32(5), 972–981 Aug. (2013).CrossRefGoogle Scholar
Van Hooreweder, B., De Coninck, F., Moens, D., Boonen, R., and Sas, P.: Microstructural characterization of SLS-PA12 specimens under dynamic tension/compression excitation. Polym. Test. 29(3), 319–326 May (2010).CrossRefGoogle Scholar
Munguía, J., Dalgarno, K.W., and Reid, R.: Fatigue behavior of additive manufacturing parts: A preliminary analysis. Conference Proceedings, 5th International Conference on Advanced Research and Rapid Prototyping, September 2011, Leiria, Portugal. (2012).Google Scholar
Davidson, C.: Investigating the suitability of laser sintered elastomers for running footwear applications. PhD Thesis, submitted to Loughborough University (2012).Google Scholar
Ferry, J.D.: Viscoelastic Properties of Polymers, 3rd ed.; John Wiley and Sons Ltd., New York, NY, 1980.Google Scholar
Greco, R. and Nicolais, L.: Glass transition temperature in nylons. Polymer 17(12), 1049–1053 Dec. (1976).CrossRefGoogle Scholar
Olabisi, O. and Adewale, K.: Handbook of Thermoplastics (Marcel Dekker, New York, NY, 1997).Google Scholar
Suresh, S.: Fatigue of Materials, 2nd ed.; Cambridge University Press, 2001.Google Scholar
Michler, G.H.: Electron Microscopy of Polymers (Springer-Verlag, Berlin, 2008).Google Scholar