Issue 73

S. Mara ş et alii, Fracture and Structural Integrity, 73 (2025) 200-218; DOI: 10.3221/IGF-ESIS.73.14

a/b=2.5

100 200 300 400 500 600 Natural Frequency (Hz)

A B G H I ω ₁ 158.97 155.9 154.48 156.67 159.5 155.36 169.67 174.09 171.13 ω ₂ 223.35 219.08 217.18 220.12 224.06 218.38 238.4 244.42 240.33 ω ₃ 331.52 325.21 322.45 326.72 332.53 324.2 353.84 362.65 356.62 ω ₄ 483 473.85 469.91 476.01 484.43 472.43 515.53 528.16 519.44 0 Configurations C D E F

Figure 19: Variation of the natural frequencies of 3D-printed PA6 plates with fully simple supported boundary conditions and an aspect ratio of a/b =2.5 for various configurations. Figs. 20, 21, 22, and 23 present the first four mode shapes of the 3D-printed PA6 plate featuring an H-configuration and simply supported (SSSS) boundary conditions, corresponding to aspect ratios of a/b = 1.0, 1.5, 2.0, and 2.5, respectively.

Figure 20: Mode shapes of the 3D-printed PA6 plate with H-configuration and SSSS boundary conditions for aspect ratio a/b =1: (a) Mode 1, (b) Mode 2, (c) Mode 3, (d) Mode 4.

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