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Materials Science in Additive Manufacturing 3D-printed composite auxetic structures

A B

C

Figure 11. Test results of rotating rigid structures. (A) Deformation of test specimens. (B) Stress-strain curves of three specimens under tensile loads.
(C) Plots of Poisson’s ratio versus strain of three specimens.

A B

C

Figure 12. Test results of re-entrant structures. (A) Deformation of test specimens. (B) Stress-strain curves of three specimens under tensile loads. (C) Plots
of Poisson’s ratio versus strain of three specimens.

PA. The auxetic behavior of rotating rigid structure was by the different patterns of fiber reinforcement. Rotating
engendered by the rotation of squares, and the addition rigid FR2, which was infilled with four continuous fibers
of fibers has little influence on such deformation. Despite along the axial direction (Figure 3), had the smallest
the similar trends, Poisson’s ratios of the fiber-reinforced Poisson’ ratio. Due to the high stiffness, the reinforcing
specimens and the specimens fabricated with pure fibers limited the tensile deformation of the structure,
Smooth PA were inherently different, a disparity caused causing a decrease in Poisson’s ratio (according to

Volume 2 Issue 4 (2023) 8 https://doi.org/10.36922/msam.2159