2020
DOI: 10.1016/j.ijnonlinmec.2020.103546
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3D printed elastomeric polyurethane: Viscoelastic experimental characterizations and constitutive modelling with nonlinear viscosity functions

Abstract: Digital Light Synthesis (DLS) technology creates ample opportunities for making 3D printed soft polymers for a wide range of grades and properties. In DLS, a 3D printer uses a continuous building technique in which the curing process is activated by an ultraviolet (UV) light. In this contribution, EUP40, a recently invented commercially available elastomeric polyurethane (EPU) printed by the DLS technology, is experimentally characterised. For characterizing the mechanical properties, an extensive viscoelastic… Show more

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Cited by 57 publications
(19 citation statements)
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“…The built part is supported by a structure, which holds pattern in the liquid resin bath, and prevents the newly formed layer from moving out of the position from the already built portion. Once a layer is scanned and cured, the platform or the support structure moves downward or upward by several micrometers (μm, based on the resolution of a printer) to make another layer of liquid resin available to be cured [22] , [23] , [7] , [8] , [21] .…”
Section: Additive Manufacturing Techniques Used During the Covid-19 Pmentioning
confidence: 99%
See 1 more Smart Citation
“…The built part is supported by a structure, which holds pattern in the liquid resin bath, and prevents the newly formed layer from moving out of the position from the already built portion. Once a layer is scanned and cured, the platform or the support structure moves downward or upward by several micrometers (μm, based on the resolution of a printer) to make another layer of liquid resin available to be cured [22] , [23] , [7] , [8] , [21] .…”
Section: Additive Manufacturing Techniques Used During the Covid-19 Pmentioning
confidence: 99%
“…Parts can be fabricated in a single step removing the need for assembly in some cases, thus reducing post-processing and lead times. Thanks to these attractive manufacturing advantages, AM is extensively utilised in medical, aerospace, and automotive industries [5] , [6] , [7] , [8] , to mention a few. The advantage of part customisation is utilised highly in medical applications, in which parts can be customised to the individual patient's data [9] , [10] .…”
Section: Introductionmentioning
confidence: 99%
“…Knowing how the printed material behaves in those situations is of great importance for designing purposes, therefore uni-axial tests of loading and unloading were performed imposing a series of cycles with increasing strain as can be seen in Figure 7 . If the unloading curve changes with the maximum strain reached, the Mullins effect is presented in the printed material [ 18 , 29 , 31 ] and further investigation is needed. The material proposed for the present framework does not show significant Mullins effect since the unloading curves of Figure 7 at different strains ( = 0.15 and 0.3) present similar slopes.…”
Section: Resultsmentioning
confidence: 99%
“…Finally, they take advantage of this behavior to produce optimized printing orientations for final parts. Hossain et al [ 18 ] studied the behavior of a printed material obtained by digital light projector DLP process, focusing on the viscoelastic constitutive behaviour at low strain rates. However, the author does not focus on the influence of the printing parameters in the behaviour of the material.…”
Section: Introductionmentioning
confidence: 99%
“…Build orientation, layer thickness, and feed rate are discussed on 3D-printed PLA samples in [48], and layer thickness and raster angle parameters for PLA and ABS in [49]. In order to model the mechanical response of additive manufactured polymers [50][51][52], well-known homogenization techniques are used in composite materials [53], for example by using a variation of carbon-fiber content in thermoplastic matrix-based composites built by the FDM [54] and also for identifying substructure-related anisotropic properties [55] to be used in computations [56,57].…”
Section: Introductionmentioning
confidence: 99%