Design of FDM fabricated poly-lactic acid parts with forced-air cooling speed as the new control parameter to tune its shape memory effect
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU151856" target="_blank" >RIV/00216305:26210/24:PU151856 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1361-665X/ad65a9" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-665X/ad65a9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-665X/ad65a9" target="_blank" >10.1088/1361-665X/ad65a9</a>
Alternative languages
Result language
angličtina
Original language name
Design of FDM fabricated poly-lactic acid parts with forced-air cooling speed as the new control parameter to tune its shape memory effect
Original language description
Poly lactic acid (PLA) as one of the shape memory polymers has extensively been used as the material in the 3D printing by fused deposition modeling process. In this study, we introduced the forced-air cooling speed as new control parameter in the fabrication process. A commercial material extrusion printer was retrofitted with a control module of forced-air cooling system. The shape memory effects of the PLA printed in different cooling speeds from 0-5 m s-1 were first measured by submerging the printed coupon specimens into water bath at recovery temperature. It is found that the changes in dimensions were mainly anisotropic and dependent of the raster angle in printing, in addition to the controlled cooling speed. The shape memory strains were roughly in linear trend with the magnitude of cooling air speed. In other words, the shape memory effect of the PLA can be easily controlled by the cooling air speed in fabrication. X-ray diffraction measurement on the specimens before and after recovery treatment confirmed the shape memory effect was related to the partial crystallization of molecular structure. Moreover, the different cooling air speeds also induced different thermal stresses in the printed specimens which manifest its important role in the total shape memory strain. Finally, the proposed theoretical beam formulation for the recovery bending deflection was shown to have good prediction accuracy comparing with experimental measurements.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
21101 - Food and beverages
Result continuities
Project
<a href="/en/project/GC22-14387J" target="_blank" >GC22-14387J: Design and manufacturing of 4D metamaterials based on printed structures with embedded elements of smart materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
SMART MATERIALS & STRUCTURES
ISSN
0964-1726
e-ISSN
1361-665X
Volume of the periodical
33
Issue of the periodical within the volume
8
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
„“-„“
UT code for WoS article
001279021400001
EID of the result in the Scopus database
2-s2.0-85200201081