Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams
Abstract
:1. Introduction
2. Theoretical Modelling
2.1. General Sandwich Beam Specimens
2.2. Symmetrical Sandwich Beam Specimens
3. Simulations and Discussions
3.1. Constant Damping Model
3.2. Frequency-Dependent Viscoelastic Model
4. Experimental Validation
4.1. Experimental Apparatus
4.2. Test Specimens
4.3. Experimental Results
4.3.1. Normalized Displacement Frequency Responses
4.3.2. Modal Frequencies and Loss Factors of Sandwich Specimens
4.3.3. Modal Shear Moduli and Modal Loss Factors
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
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Beam Type | Materials | Thickness (mm) | Modal Frequency (Hz) | ||||
---|---|---|---|---|---|---|---|
2 | 3 | 4 | 5 | 6 | |||
Base 1 | Steel | 0.90 | 143.55 | 402.80 | 792.30 | 1311.0 | 1957.0 |
Base 2 | Steel | 1.02 | 164.50 | 459.50 | 900.30 | 1488.0 | 2221.0 |
Sandwich | —— | 2.42 | 161.31 | 434.50 | 842.50 | 1388.0 | 2068.0 |
Beam Type | Materials | Thickness (mm) | Modal Frequency (Hz) | |||||
---|---|---|---|---|---|---|---|---|
2 | 3 | 4 | 5 | 6 | 7 | |||
Base 1 | Steel | 0.97 | 87.63 | 246.06 | 482.80 | 798.50 | 1193.0 | 1668.0 |
Base 2 | Aluminium | 0.90 | 76.13 | 219.00 | 432.00 | 717.60 | 1078.5 | 1512.0 |
Sandwich | —— | 2.37 | 92.94 | 245.00 | 469.00 | 768.50 | 1145.0 | 1597.0 |
Beam Type | Materials | Thickness (mm) | Modal Frequency (Hz) | |||||
---|---|---|---|---|---|---|---|---|
2 | 3 | 4 | 5 | 6 | 7 | |||
Base 1 | Steel | 0.97 | 87.63 | 246.30 | 483.00 | 799.50 | 1195.0 | 1669.0 |
Base 2 | Steel | 0.97 | 87.50 | 246.10 | 483.00 | 798.50 | 1194.0 | 1668.0 |
Sandwich | —— | 2.44 | 91.94 | 248.00 | 480.75 | 789.25 | 1177.5 | 1645.0 |
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Wu, Q.; Wang, M. Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams. Appl. Sci. 2018, 8, 1359. https://doi.org/10.3390/app8081359
Wu Q, Wang M. Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams. Applied Sciences. 2018; 8(8):1359. https://doi.org/10.3390/app8081359
Chicago/Turabian StyleWu, Qingqing, and Minqing Wang. 2018. "Study on the Dynamic Mechanical Properties of Viscoelastic Materials Based on Asymmetrical Sandwich Beams" Applied Sciences 8, no. 8: 1359. https://doi.org/10.3390/app8081359