Multiscale characterization and constitutive parameters identification of polyamide (PA12) processed via selective laser sintering
Source abstract
Abstract
Abstract This study is focused on multiscale characterization and constitutive parameters identification of selectively laser sintered PA12 specimens. The process parameters and change in crystallinity due to 3D printing were identified via differential scanning calorimetry (DSC). Tension, compression, shear, flexural and fracture tests performed on samples fabricated, both in 0° and 90° directions reveal that the tensile toughness of samples printed in 0° orientation, outperform samples printed in 90° orientation by an average of 24%. Cryogenically fractured samples were analyzed via SEM and micro-computed tomography to analyze 2D/3D defects and correlate the microstructure with macroscopic properties. The constitutive parameters for a strain-rate and temperature-dependent Three Network (TN) material model were identified using the measured mechanical properties. Furthermore, mechanical response of micro-architected Kelvin lattice structure was analyzed by Finite Element Method employing the TN constitutive model and the predictions were corroborated with measurements.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing and 3D Printing Technologies · Injection Molding Process and Properties · Cellular and Composite Structures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
Show source-provided references
1. Jacobs · 1996
2. Chapter 2 - basics of 3D printing: engineering aspects
3. Rapid manufacturing and rapid tooling with layer manufacturing (lm) technologies, state of the art and future perspectives10.1016/S0007-8506(07)60206-6 ↗
4. Current achievements and future outlook for composites in 3D printing
5. Lipson · 2013
6. Tunable energy absorption characteristics of architected honeycombs enabled via additive manufacturing10.1021/acsami.9b12880 ↗
7. Lightweight metal cellular structures fabricated via 3D printing of sand cast molds10.1002/adem.201400524 ↗
8. Ultralight, ultrastiff mechanical metamaterials10.1126/science.1252291 ↗
9. Lightweight 3D cellular composites inspired by balsa10.1088/1748-3190/aa6028 ↗
10. Performance enhancement of tubular multilayers via compliance-tailoring: 3D printing, testing and modeling10.1016/j.ijmecsci.2018.02.038 ↗
11. Impact performance enhancement of honeycombs through additive manufacturing-enabled geometrical tailoring10.1016/j.ijimpeng.2019.103360 ↗
12. Ultralight shape-recovering plate mechanical metamaterials10.1038/ncomms10019 ↗
13. Enhanced bonding via additive manufacturing-enabled surface tailoring of 3D printed continuous-fiber composites10.1002/adem.201800691 ↗
14. Gibson
15. Becker · 2016
16. SLS-Prozess
17. Consolidation of polymer powders by selective laser sintering
18. Microstructural and mechanical characterization of PA12/MWCNTs nanocomposite manufactured by selective laser sintering10.1016/j.polymertesting.2011.04.007 ↗
19. Characterization of PA12/PBT specimens prepared by selective laser sintering
20. Aging effects of polyamide 12 in selective laser sintering: molecular weight distribution and thermal properties
21. Effect of PA12 powder reuse on coalescence behaviour and microstructure of SLS parts10.1016/j.eurpolymj.2017.05.014 ↗
22. Influence of post-condensation on the crystallization kinetics of PA12: from virgin to reused powder10.1016/j.polymer.2019.05.009 ↗
23. Characterizing the effect of additives to ABS on the mechanical property anisotropy of specimens fabricated by material extrusion 3D printing
24. Faes · 2015
25. Additive manufacturing-enabled shape transformations via FFF 4D printing
26. Hyperelastic strain measurements and constitutive parameters identification of 3D printed soft polymers by image processing
27. 3Dsystems
28. Sharebot
29. Digital image correlation10.1016/S1369-7021(10)70235-2 ↗
30. Polyvinyl alcohol incorporated buckypaper composites for improved multifunctional performance10.1016/j.compscitech.2018.10.010 ↗
31. Performance of biocompatible PEEK processed by fused deposition additive manufacturing10.1016/j.matdes.2018.03.015 ↗
32. Effect of annealing on thermal properties and crystalline structure of polyamides. Nylon 12 (polylaurolactam)10.1007/BF01382456 ↗
33. Veryst engineering
34. Large strain time-dependent behaviour of filled elastomers10.1016/S0167-6636(00)00028-4 ↗
35. A three-dimensional constitutive model for the large stretch behavior of rubber elastic materials10.1016/0022-5096(93)90013-6 ↗
36. Strength and performance enhancement of multilayers by spatial tailoring of adherend compliance and morphology via multimaterial jetting additive manufacturing10.1038/s41598-018-31819-2 ↗