Page 65 - MSAM-2-1

Materials Science in Additive Manufacturing Energy absorption of Moore’s thin-walled structures

A B

C D

Figure 4. Boundary conditions on reference points to simulate 2 order fractal structures with shell elements from (A) loading direction 1 (LD1) and
nd
(B) loading direction 2 (LD2). Mesh size convergence study on the 2 order (20% relative density) structure from (C) LD1 and (D) LD2.
nd
A B

C D

Figure 5. Effective stress-strain curves obtained from quasi-static compression test from loading direction 1 (LD1): (A) Relative density (rd) = 20%, (B) rd
= 30%, and (C) rd = 40%. (D) 2 order structure being compressed from LD1. Magnified images in A–C provide clearer views for comparing the beginning
nd
responses during compression.
Another characteristic feature of all the effective stress- numerous sudden stress drops from the snap within the
strain curves was the jagged pattern, which suggested structures during compression. The snaping was attributed

Volume 2 Issue 1 (2023) 6 https://doi.org/10.36922/msam.53