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Article

Advanced Infill Designs for 3D Printed Shape-Memory Components

Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany
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Academic Editors: Matteo Cocuzza and Simone Luigi Marasso
Micromachines 2021, 12(10), 1225; https://doi.org/10.3390/mi12101225
Received: 20 September 2021 / Revised: 6 October 2021 / Accepted: 7 October 2021 / Published: 8 October 2021
(This article belongs to the Special Issue Advancements and Applications in Polymeric 3D Printing)
Poly(lactic acid) (PLA) is one of the most often used polymers in 3D printing based on the fused deposition modeling (FDM) method. On the other hand, PLA is also a shape memory polymer (SMP) with a relatively low glass transition temperature of ~60 °C, depending on the exact material composition. This enables, on the one hand, so-called 4D printing, i.e., printing flat objects which are deformed afterwards by heating them above the glass transition temperature, shaping them and cooling them down in the desired shape. On the other hand, objects from PLA which have been erroneously deformed, e.g., bumpers during an accident, can recover their original shape to a certain amount, depending on the applied temperature, the number of deformation cycles, and especially on the number of broken connections inside the object. Here, we report on an extension of a previous study, investigating optimized infill designs which avoid breaking in 3-point bending tests and thus allow for multiple repeated destruction and recovery cycles with only a small loss in maximum force at a certain deflection. View Full-Text
Keywords: 3D printing; poly(lactic acid) (PLA); fused deposition modeling (FDM); shape-memory polymer (SMP); 4D printing; infill patterns 3D printing; poly(lactic acid) (PLA); fused deposition modeling (FDM); shape-memory polymer (SMP); 4D printing; infill patterns
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MDPI and ACS Style

Koske, D.; Ehrmann, A. Advanced Infill Designs for 3D Printed Shape-Memory Components. Micromachines 2021, 12, 1225. https://doi.org/10.3390/mi12101225

AMA Style

Koske D, Ehrmann A. Advanced Infill Designs for 3D Printed Shape-Memory Components. Micromachines. 2021; 12(10):1225. https://doi.org/10.3390/mi12101225

Chicago/Turabian Style

Koske, Daniel, and Andrea Ehrmann. 2021. "Advanced Infill Designs for 3D Printed Shape-Memory Components" Micromachines 12, no. 10: 1225. https://doi.org/10.3390/mi12101225

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