Abstract
Circular sandwich panels were designed with Aluminium being core material, steel and Al-Al-based high entropy alloy (Al-based HEA) as the surface board materials, respectively. The dynamic response and influence of small changes in thickness and inherent properties (poisson ratio and density) of the sandwich panels are investigated by a three-dimensional finite element modeling. The nonlinear vibration of the sandwich panel changes from steady state to multiple-periods-bifurcation and chaotic vibration state by changing the forced excitation frequency, amplitude and the initial conditions. Compared with Al-steel sandwich panel, Al-based HEA sandwich panel has good stability under high excitation frequency. Our research shows that Al-Al HEA has potential advantages to be a aircraft and aerospace sandwich panel candidate.
Highlights
High-entropy alloys (HEAs) are a new class of materials made from multiple transition-metal elements in equimolar or nearequimolar ratios
Considering the fairly good high temperature specific yield strength, the Al19Co15Cr15Ni51 have produced fruitful results.5–12High-entropy alloys (HEAs) may have a potential application in aircraft and aerospace fields
The research on the vibration behavior of Al-based HEA circular sandwich panel is of importance for its potential application as aircraft and aerospace material
Summary
Composite laminate structures has widely used in aircraft, aerospace and transportation fields. By selecting appropriate surface and laminated materials, good vibration, heat insulation, sound insulation etc can be achieved. During the past few years, both theoretical and experimental researches on the composite sandwich structure, viscoelastic materials, aluminum foam, honeycomb sandwich, and filled polymer structure have produced fruitful results.. As a promising structural material, HEAs have excellent mechanical properties, such as high specific strength, good oxidation and corrosion resistance, outstanding wear resistance, and radiation tolerance.. Considering the fairly good high temperature specific yield strength, the Al19Co15Cr15Ni51 HEA may have a potential application in aircraft and aerospace fields. It is of very importance to investigate the vibration stability of Al-Al-based high entropy alloy during their service. We design an Al-Al-based high entropy alloy circular sandwich panel with Alas core material, and Al-based HEA as a surface board. The effect of various physical parameters on the vibration behavior of the sandwich panel was investigated. The research on the vibration behavior of Al-based HEA circular sandwich panel is of importance for its potential application as aircraft and aerospace material
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