Dynamic characterization and modeling of steel foam sandwich structure

Farhadi, Sasan; Ziadloo, Shervin

doi:10.21595/vp.2019.20777

Cited by 1 publication

(2 citation statements)

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“…All tests depict a decay for the damping ratio by raising the frequencies. When analyzing the double-phase cores (i.e., presence of sand in the core), the white noise test did not resemble to show any differences between the specimens as the damping ratios are quite identical, especially for the 500D configuration [34].…”

Section: Fig 5 Fem Vs Exp Resultsmentioning

confidence: 93%

“…The mesh was formed by 1020 Elements (1900 Elements for the specimen 500D) and 756 nodes (1404 nodes for the specimen 500D) to have a relevant deformation control. Both harmonic and modal analyses were performed on the models, iteratively, to update and calibrate the values of the damping ratio [33,34]. This was done accordingly to the model updating procedure described in [35] and more recently applied in [36,37].…”

Section: Fe Modeling and Model Calibrationmentioning

confidence: 99%

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Experimental estimation of the damping ratio of metallic foam sandwich panels with sand intrusions

Farhadi¹,

Civera²

2021

J. vibroeng.

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The interest to use steel foam sandwich structures is expanding in various industrial applications, and more attention is paid to improve the properties of these materials. However, liquid and solid intrusions can severely hamper their useful characteristics. This study aims to provide an experimental investigation on the potential of steel foam (hollow sphere) sandwich specimens to operate as passive dampers in flexural vibration and to preserve their capabilities when affected by the intrusion of external particles. The authors utilized two different experimental examinations, random noise (white noise) and impact (hammer) tests. The specimens consist of a hollow sphere foam core sandwiched between two mild steel sheets, bonded with a thermosetting epoxy resin. To simulate the intrusions of granular materials in operating conditions, the metallic foam cores of the samples were partially filled with different percentages of quartz sand particles. The two-phase specimens were then compared to the pristine (single-phase) ones. The resulting estimates of the vibrational damping ratio for single and double-phase metallic foam specimens were used to calibrate the respective Finite Element models, which proved to be suitable for replicating the damping characteristics of the specimens.

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Section: Fig 5 Fem Vs Exp Resultsmentioning

confidence: 93%