Thermo Mechanical Modeling of Selective Inhibition Sintered Thermoplastic Parts

Abstract:

Contemporary product design and development efforts of various engineering organizations have experienced the emergence of Additive Manufacturing (AM) or 3D printing technology as a competent fabrication option for converting digital data into physical parts without using part-specific tools or fixtures. This paper presents the results of coupled field structural thermal analysis carried out on an innovative variant of AM technology called selective inhibition sintering wherein near net shape parts are fabricated through sintering of thin layers of powdered material while inhibiting the boundaries. Thermal gradients that are inherent to the process cause significant residual stresses affecting the part stability. Hence this study evaluates the effect of layer thickness and heater spot size on temperature gradient, displacement and thermal stress of two different polymers is assessed by numerical analysis. Results of the current study are relevant to enhancing the quality of sintered polymer parts with reference to dimensional fidelity and stability.

• Periodical: Applied Mechanics and Materials (Volumes 813-814)
• Pages: 791-795
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.813-814.791
• Online since: November 2015
• Authors: P. Arunkumar, Esakki Balasubramanian*, U. Chandrasekhar
• Keywords: Finite Element Analysis, Polymers, Selective Inhibition Sintering, Thermo-Structural

References

[1] C.K. Chua, K.F. Leong, Rapid Prototyping: Principles and Applications in Manufacturing, John Wiley & Sons, (1998).

[2] B. Khoshnevis and B. Asiabanpour, Selective inhibition of sintering, Rapid Prototyping: Theory and Practice, 8 (2006) 197-220.

DOI: 10.1007/0-387-23291-5_8

[3] B. Asiabanpour, B. Khoshnevis, K. Palmer and M. Mojdeh, Advancements in the SIS process, In Proceedings from the 14th SFF Symposium, Austin, Texas, (2003) 25-38.

DOI: 10.1108/13552540310455638

[4] B. Khoshnevis, B. Asiabanpour, M. Mojdeh, and K. Palmer, SIS – A New SFF Method Based on Powder Sintering, Rapid Prototyping Journal, 1 (2003) 30-36.

DOI: 10.1108/13552540310455638

[5] B. Asiabanpour, K. Palmer, and B. Khoshnevis, Performance factors in the selective inhibition of sintering process, Institute of Industrial Engineering Research Conference, Portland, OR. (2003).

[6] L. Dong, A. Markradi, S. Ahzi, and Y. Remond, Three-dimensional transient finite element analysis of the selective laser sintering process, Journal of materials processing technology, 209 (2009) 700-706.

DOI: 10.1016/j.jmatprotec.2008.02.040

[7] S. P Soe, and D. R Eyers, FEA support structure generation for the additive manufacture of CastForm™ polystyrene patterns, Polymer Testing, 33 (2014) 187-197.

DOI: 10.1016/j.polymertesting.2013.08.009

[8] A. Hussein, L. Hao and C. Yan, Finite element simulation of the temperature and stress fields in single layers built without-support in selective laser melting, Materials & Design, 52 (2013) 638-647.

DOI: 10.1016/j.matdes.2013.05.070

[9] S. Kolossov, E. Boillat, R. Glardon, P. Fischer and M. Locher, 3D FE simulation for temperature evolution in the selective laser sintering process, International Journal of Machine Tools and Manufacture, 44 (2004) 117-123.

DOI: 10.1016/j.ijmachtools.2003.10.019

[10] D. L. Bourell, T. J. Watt, D. K. Leigh and B. Fulcher, Performance limitations in polymer laser sintering. Physics Procedia, 56 (2014) 147-156.

DOI: 10.1016/j.phpro.2014.08.157

[11] S. Kumar, Selective Laser Sintering/Melting, Advances in Additive Manufacturing and Tooling, 10 (2014) 93-134.

[12] J. E. Mark, Polymer Data Handbook, 3rd Edition, Oxford University Press, (1999).