Next Article in Journal
Respiration Measurement in a Simulated Setting Incorporating the Internet of Things
Next Article in Special Issue
Effect of Different Physical Cross-Linkers on Drug Release from Hydrogel Layers Coated on Magnetically Steerable 3D-Printed Microdevices
Previous Article in Journal
Review of Battery Management Systems (BMS) Development and Industrial Standards
Previous Article in Special Issue
In Situ SEM Study of the Micro-Mechanical Behaviour of 3D-Printed Aluminium Alloy

Infill Designs for 3D-Printed Shape-Memory Objects

Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany
Author to whom correspondence should be addressed.
Academic Editor: Roberto Bernasconi
Technologies 2021, 9(2), 29;
Received: 27 March 2021 / Revised: 10 April 2021 / Accepted: 13 April 2021 / Published: 16 April 2021
(This article belongs to the Special Issue 3D Printing Technologies)
Shape-memory polymers (SMPs) can be deformed, cooled down, keeping their new shape for a long time, and recovered into their original shape after being heated above the glass or melting temperature again. Some SMPs, such as poly(lactic acid) (PLA), can be 3D printed, enabling a combination of 3D-printed shapes and 2D-printed, 3D-deformed ones. While deformation at high temperatures can be used, e.g., to fit orthoses to patients, SMPs used in protective equipment, bumpers, etc., are deformed at low temperatures, possibly causing irreversible breaks. Here, we compare different typical infill patterns, offered by common slicing software, with self-designed infill structures. Three-point bending tests were performed until maximum deflection as well as until the maximum force was reached, and then the samples were recovered in a warm water bath and tested again. The results show a severe influence of the infill pattern as well as the printing orientation on the amount of broken bonds and thus the mechanical properties after up to ten test/recovery cycles. View Full-Text
Keywords: poly(lactic acid) (PLA); shape-memory polymer (SMP); fused deposition modeling (FDM); 3D printing; infill pattern poly(lactic acid) (PLA); shape-memory polymer (SMP); fused deposition modeling (FDM); 3D printing; infill pattern
Show Figures

Figure 1

MDPI and ACS Style

Koske, D.; Ehrmann, A. Infill Designs for 3D-Printed Shape-Memory Objects. Technologies 2021, 9, 29.

AMA Style

Koske D, Ehrmann A. Infill Designs for 3D-Printed Shape-Memory Objects. Technologies. 2021; 9(2):29.

Chicago/Turabian Style

Koske, Daniel, and Andrea Ehrmann. 2021. "Infill Designs for 3D-Printed Shape-Memory Objects" Technologies 9, no. 2: 29.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop