PSI - Issue 47

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Andreal Muhammad Naufal et al. / Procedia Structural Integrity 47 (2023) 133–141 Naufal et al. / Structural Integrity Procedia 00 (2019) 000 – 000

330

2.25

310

290

270

250

230

210

Convergence line

Ultimate Point Load (N)

190

1

0.5

0.75

170

150

0

5000

10000

15000

20000

25000

30000

Mesh Element

Figure 10. Mesh convergent curve (mesh sizes of 0.5 – 2.25 are in mm).

6. Conclusions After conducting material testing using the ASTM D7264 standard, making a design for numerical validation, benchmarking comparing the test results with numerical analysis and mesh convergence, the following conclusions were obtained: 1. The actual test results using three-point bending test obtained the maximum strength of the sandwich material of 200.11 N with a maximum elongation of 6.75 mm. 2. After testing, we can find out the character of the carbon-Nomex aramid sandwich material. It is known that during testing the specimen lower facing did not experience failures during the test. Only the top and core were damaged as the test progressed. Thus, it can be concluded that the carbon-aramid Nomex sandwich material is resilient. 3. From the benchmarking results, it is known that the numerical simulation results are at the maximum stress point of 195,909 N or 2% smaller than the actual test results, while the elongation is obtained at 6.35 mm or 8.35% of the actual test results. These results are influenced primarily by material configuration and mesh configuration. For future studies, you can do a parametric study in the form of a CWP pipe. In addition, a study can also be carried out on the suitability of the material used in the CWP pipe application to find out whether the carbon-Nomex honeycomb sandwich material is suitable and feasible to be applied in the real world. Acknowledgments This work was supported by the RKAT PTNBH Universitas Sebelas Maret Year 2023, under the Research Scheme of “Penelitian Unggulan Terapan” (PUT -UNS), with research grant/contract no. 228/UN27.22/PT.01.03/2023. The support is gratefully acknowledged by the authors.