Issue 73

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

a/b=1.5

100 150 200 250 300

A B G H I ω ₁ 71.29 69.91 69.27 70.25 71.53 69.66 76.09 78.08 76.75 ω ₂ 136.84 134.2 132.99 134.86 137.3 133.75 146.06 149.84 147.3 ω ₃ 219.48 215.24 213.29 216.31 220.22 214.5 234.26 240.36 236.27 ω ₄ 246.27 241.54 239.38 242.71 247.08 240.72 262.86 269.62 265.06 0 50 Configurations C D E F

Natural Frequency (Hz)

Figure 17: Variation of the natural frequencies of 3D-printed PA6 plates with fully simple supported boundary conditions and an aspect ratio of a/b =1.5 for various configurations.

a/b=2

100 150 200 250 300 350 400 450

A B G H I ω ₁ 109.66 107.54 106.56 108.07 110.03 107.17 117.04 120.1 118.06 ω ₂ 174.67 171.31 169.8 172.14 175.23 170.75 186.43 191.19 187.97 ω ₃ 283.57 278.14 275.72 279.47 284.47 277.25 302.67 310.32 305.12 ω ₄ 372.22 365.08 361.85 366.84 373.42 363.87 397.29 407.43 400.58 0 50 Configurations C D E F

Natural Frequency (Hz)

Figure 18: Variation of the natural frequencies of 3D-printed PA6 plates with fully simple supported boundary conditions and an aspect ratio of a/b =2 for various configurations.

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