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academies
February 25-26, 2019 | Paris, France
Materials Science and Engineering
2
nd
International Conference on
Journal of Materials Science and Nanotechnology | Volume 3
T
he printability conditions of copolyester are investigated
using different instrumental techniques such as infra-
red camera observations, Differential Scanning Calorimetry,
Scanning Electron Microscopy, X-ray micro-tomography, and
mechanical testing. The Fused Deposition Modelling (FDM)
technique is used to fabricate various types of specimens for
the purpose of assessing both the thermal and mechanical
properties of copolyester. The optimal conditions for 3Dprinting
of copolyester are determined based on the influence of
dimensional scaling, printing temperature, and type of layups.
Thermal behavior isdeterminedby lookingat thethermal cycling
on both prints and rafts as a function of the process conditions.
Tensile properties are measured for both the raw and printed
copolyester and the loss in mechanical performance including
stiffness, plasticity and failure is quantified with respect to
the printing temperature. In addition, the microstructural
arrangement is investigated using X-ray micro-tomography
to reveal the nature, the extent, and the 3D arrangement of
defects. Analysis of ruptured samples is performed using SEM
analysis. The results reveal a significant non-linear effect of
the printing temperature on the performance of copolyester.
A complex microstructural arrangement of defects is revealed
including a regular network of porous structure. The failure of
printed copolyester is explained through SEM analysis by the
combination of three different damage mechanisms. These
results suggest a strong correlation between the observed
thermal cycling and themechanical performance of copolyester.
Speaker Biography
Guessasma S is a mechanical engineering scientist, a by-fellow of the Churchill College,
University of Cambridge, UK. He is presently a senior scientist at INRA (France)
conducting a research activity in the field of additive manufacturing of biosourced
materials. He has a key interest on hot topics in mechanical engineering, processing
and materials science. He has several contributions related to the microstructural
interpretation of material performance, mechanical modelling, image analysis, and
in-situ experiments. He has published over 100 papers in different research fields.
e:
sofiane.guessasma@inra.frGuessasma S
INRA, France
Printability of polymers in additive manufacturing: The example of copolyester