Mechanical and kinetic characterization of additively manufactured PLA structures for improved process and warpage modeling
Felix Frölich, Dominik Dörr, Alexander Jackstadt, Florian Wittemann, Luise Kärger
Abstract. This work focuses on the kinetic and thermomechanical characterization of a polylactide (PLA) in the context of material extrusion (MEX) to gain a basis for material modeling that can be utilized to predict process-induced deformations throughout the process chain using process simulation. The research provides a detailed understanding of the material behavior at different process stages and the mechanisms contributing to residual stresses and warpage. This is achieved through experimental investigations using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and thermomechanical analysis (TMA). In order to cover each process step, the experiments are performed on printed and partly on raw material. Finally, the discussed results are summarized in a recommendation as to which effects should be considered in each process step for adequate warpage prediction.
Keywords
Material Extrusion, MEX, Material Modeling, DSC, DMA, TMA
Published online 5/7/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Felix Frölich, Dominik Dörr, Alexander Jackstadt, Florian Wittemann, Luise Kärger, Mechanical and kinetic characterization of additively manufactured PLA structures for improved process and warpage modeling, Materials Research Proceedings, Vol. 54, pp 2281-2290, 2025
DOI: https://doi.org/10.21741/9781644903599-246
The article was published as article 246 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] J. Butt, R. Bhaskar, Investigating the effects of annealing on the mechanical properties of FFF-printed thermoplastics, Journal of Manufacturing and Materials Processing 4 (2020) 1–20
[2] T. Tábi, I.E. Sajó, F. Szabó, A.S. Luyt, J.G. Kovács, Crystalline structure of annealed polylactic acid and its relation to processing, Express Polymer Letters 4 (2010) 659–668
[3] Y. Zhang, Y. Chou, Three-dimensional finite element analysis simulations of the fused deposition modelling process, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 220 (2006) 1663–1671
[4] A.J. Favaloro, E. Barocio, B. Brenken, R.B. Pipes, E. Barocio, R.B. Pipes, Simulation of Polymeric Composites Additive Manufacturing using Abaqus, Dassault Systemes’ Science in the Age of Experience (2017) 103–114
[5] B. Brenken, E. Barocio, A. Favaloro, V. Kunc, R.B. Pipes, Development and validation of extrusion deposition additive manufacturing process simulations, Additive Manufacturing 25 (2019) 218–226
[6] A. Trofimov, J. Le Pavic, S. Pautard, D. Therriault, M. Lévesque, Experimentally validated modeling of the temperature distribution and the distortion during the Fused Filament Fabrication process, Additive Manufacturing 54 (2022) 102693
[7] S. Farah, D.G. Anderson, R. Langer, Physical and mechanical properties of PLA, and their functions in widespread applications — A comprehensive review, Advanced Drug Delivery Reviews 107 (2016) 367–392
[8] F.X. Espinach, S. Boufi, M. Delgado-Aguilar, F. Julián, P. Mutjé, J.A. Méndez, Composites from poly(lactic acid) and bleached chemical fibres: Thermal properties, Composites Part B: Engineering 134 (2018) 169–176
[9] J.S. Bergström, D. Hayman, An Overview of Mechanical Properties and Material Modeling of Polylactide (PLA) for Medical Applications, Annals of Biomedical Engineering 44 (2016) 330–340
[10] Z. Refaa, M. Boutaous, S. Xin, D.A. Siginer, Thermophysical analysis and modeling of the crystallization and melting behavior of PLA with talc: Kinetics and crystalline structures, Journal of Thermal Analysis and Calorimetry 128 (2017) 687–698
[11] S. Saeidlou, M.A. Huneault, H. Li, C.B. Park, Poly(lactic acid) crystallization, Progress in Polymer Science 37 (2012) 1657–1677
[12] M. Cristea, D. Ionita, M.M. Iftime, Dynamic mechanical analysis investigations of PLA-based renewable materials: How are they useful?, Materials 13 (2020) 1–24
[13] V. Srinivas, C.S.J. van Hooy-Corstjens, J.A.W. Harings, Correlating molecular and crystallization dynamics to macroscopic fusion and thermodynamic stability in fused deposition modeling; a model study on polylactides, Polymer 142 (2018) 348–355
[14] S. Wang, Y. Ma, Z. Deng, S. Zhang, J. Cai, Effects of fused deposition modeling process parameters on tensile, dynamic mechanical properties of 3D printed polylactic acid materials, Polymer Testing 86 (2020) 106483
[15] B. Huang, S.H. Masood, M. Nikzad, P.R. Venugopal, A. Arivazhagan, Dynamic mechanical properties of fused deposition modelling processed polyphenylsulfone material, American Journal of Engineering and Applied Sciences 9 (2015) 1–11
[16] O.A. Mohamed, S.H. Masood, J.L. Bhowmik, Experimental Investigations of Process Parameters Influence on Rheological Behavior and Dynamic Mechanical Properties of FDM Manufactured Parts, Materials and Manufacturing Processes 31 (2016) 1983–1994
[17] F. Frölich, L. Bechtloff, B.M. Scheuring, A.L. Heuer, F. Wittemann, L. Kärger, W. V. Liebig, Evaluation of mechanical properties characterization of additively manufactured components, Progress in Additive Manufacturing (2024)
[18] T. Yao, Z. Deng, K. Zhang, S. Li, A method to predict the ultimate tensile strength of 3D printing polylactic acid (PLA) materials with different printing orientations, Composites Part B: Engineering 163 (2019) 393–402
[19] J.A. Tröger, C. Steinweller, S. Hartmann, Identification, uncertainty quantification and validation of orthotropic material properties for additively manufactured polymers, Mechanics of Materials 197 (2024)
[20] Y. Zhao, Y. Chen, Y. Zhou, Novel mechanical models of tensile strength and elastic property of FDM AM PLA materials: Experimental and theoretical analyses, Materials and Design 181 (2019) 108089
[21] Forward AM Technologies GmbH. Technical Data Sheet Ultrafuse PLA. 2024
[22] E.W. Fischer, H.J. Sterzel, G. Wegner, Investigation of the structure of solution grown crystals of lactide copolymers by means of chemical reactions, Kolloid-Zeitschrift & Zeitschrift Für Polymere 251 (1973) 980–990. https://doi.org/10.1007/BF01498927
