Page 61 - MSAM-1-3

Materials Science in Additive Manufacturing Characterization of TPMS structures

Figure 13. Deformation process of the Schwarz-P structure: sample B0.8.

A B C

D E

Figure 14. Fracture surface morphology of Schwarz-P structure: sample A0.6. (A) fracture macro-surface at a low magnification of ×200. (B), (C), (D), and
(E) show the fracture micro-surface at high magnification of ×500, ×2000, ×2000, and ×10000, respectively.

E the results. The results are shown in Figure 13. In general,
ln p ln C n ln ( p ) (V) the compression process had three stages:

1
1
E s s (i) Initial elastic stage. During this stage, as the
 E   p compression displacement increased, the compressive
p
ln   = ln C ( ) + 2ln ( ) (VI) stress increased rapidly until it reached the maximum
1
 E   s value, but the strain changed slowly. The compressive
s
strain and stress thus exhibited a linear relationship.
3.4. Compression failure mechanism (ii) Plastic plateau stage. During this stage, a localized
To investigate the failure mechanism of the Schwarz-P bulging phenomenon began to occur in the middle
structures, the crushing behavior of the samples was region of the Schwarz-P structure (as shown in
recorded, and a typical sample B0.8 was chosen to explain Figure 13, point 2). With further increases in the

Volume 1 Issue 3 (2022) 10 http://doi.org/10.18063/msam.v1i3.17