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Materials Science in Additive Manufacturing Impact resistance and porous structures

A

B

C

D

Figure 7. The impact-damaged surface of uniform triply periodic minimal surface (TPMS) sandwich structures: impact on the front (A) and back
(B) surfaces at 7 m/s; impact on the front (C) and back (D) surfaces at 10 m/s

A B

Figure 8. The impact properties of the uniform triply periodic minimal surface (TPMS) sandwich structures (n = 3): (A) v = 7 m/s and (B) v = 10 m/s

of 7 and 10 m/s, respectively. A positive gradient implies when the cell size is varied as a linear function. The positive
that the cell size increases along the impact direction gradient (i.e., G-LinearI) graded TPMS sandwich structure
(i.e., building direction), while a negative gradient implies has a smaller peak force and a larger buffer distance, which
that the cell size decreases along the impact direction. At indicates better damping performance. When the cell size
an impact velocity of 7 m/s, the force-displacement change changes as a quadratic function, the negative gradient
curves for positive and negative gradients differ significantly (i.e., G-quadraticI) graded TPMS sandwich structure has

Volume 3 Issue 4 (2024) 7 doi: 10.36922/msam.5729