Page 89 - MSAM-2-3

Materials Science in Additive Manufacturing Functional graded and hybrid TPMS lattices

A B

C D

Figure 7. Compressive response of hybrid triply periodic minimal surfaces lattices under a load rate of 2 mm/min: (A) Gyroid-primitive A30, (B) gyroid-
primitive A40, (C) primitive-gyroid A30, and (D) primitive-gyroid A40.

A

B

Figure 8. Deformation of hybrid lattices under compressive tests: (A) Primitive-gyroid lattice, and (B) gyroid-primitive lattice.

core of the structure to enlarge the ductility can improve both types of hybrid lattices can be increased with the base
the effectiveness of TPMS lattices. material that has a higher shore hardness.
Regarding the influence brought by the base material, Figure 8 illustrates the deformation history of both
compared with A30 samples are shown in Figure 7A and C, types of A30 hybrid lattices under compressive tests. Due
A40 samples (as shown in Figure 7B and D) have a more to the similar compressive behavior shared by both A30
smooth transition between stage 1 and stage 2. In addition, and A40 samples, only the deformation history of the
the A40 can significantly increase the duration of stage A30 samples is illustrated here. As shown in Figure 8A,
2 for both types of hybrid lattices, leading to a shorter the primitive-gyroid lattices exhibit a transverse expansion
densification stage. As a result, the energy absorption for during compression, indicating positive Poisson’s ratio. As

Volume 2 Issue 3 (2023) 8 https://doi.org/10.36922/msam.1753