Creep behavior of 3D printed polymer composites

The creep behavior of polymer composites containing different weight percentages of poly(lactic) acid (PLA), thermoplastic polyurethane (TPU), and poly(ethylene) glycol (PEG) is experimentally characterized and computationally modeled using finite element analysis (FEA). The composite filaments are...

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Bibliographic Details
Published in:Polymer engineering and science 2023-11, Vol.63 (11), p.3809-3818
Main Authors: Jayswal, Ajay, Liu, Jia, Harris, Gregory, Mailen, Russell, Adanur, Sabit
Format: Article
Language:English
Subjects:
3D printing
Analysis
Composite materials industry
Creep (materials)
Extruders
Filaments
Finite element method
Polyethylene glycol
Polymer industry
Polymer matrix composites
Polymeric composites
Polymers
Polyurethane resins
Polyurethanes
Prony series
Tensile stress
Thermoplastics
Three dimensional composites
Three dimensional printing
Urethane thermoplastic elastomers
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Summary:The creep behavior of polymer composites containing different weight percentages of poly(lactic) acid (PLA), thermoplastic polyurethane (TPU), and poly(ethylene) glycol (PEG) is experimentally characterized and computationally modeled using finite element analysis (FEA). The composite filaments are manufactured with melt extrusion method by using twin-screw extruders, and then are employed in the 3D printing of creep samples. The samples are tested under a constant tensile load of 100 N. In this study, the computational model is developed by using the Generalized Voigt-Kelvin solid model and three terms in Prony series. The equations of Prony series were obtained by the Laplace transformation of Kelvin model. The experimental creep displacements and strains are compared with computational results, and a good agreement between them is observed. The maximum error percentage in computational result is approximately 6% as compared to the experimental result. Hence, it can be said that the relatively simple computational models developed are reliable and can be used to study the creep behavior of similar polymers. The error percentages can still be reduced by considering a higher number of terms of Prony series in the model.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.26486