Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation
Abstract
:1. Introduction
2. Static Material Tests
3. DMA Material Tests
4. Dynamic Tests on Wall Panels
4.1. Experimental Setup
4.2. Results
5. Conclusions
- Polyurethane foam behaves in a highly nonlinear way both during static compression and tension.
- Storage modulus of the polyurethane foam is significantly larger in relation to the value obtained for the mineral wool.
- Loss modulus of the polyurethane foam is much larger compared to the modulus of the mineral wool.
- Polyurethane foam, as a material, is able to absorb a greater amount of energy. Comparing it to the mineral wool, it is a material with much better energy absorption capabilities.
- The use of polyurethane foam as thermal isolation leads to a substantial increase in stiffness and damping properties of wall panels, compared to the mineral wood.
- The panel filled with the polyurethane foam passed all the tests without any damages, whereas the tests for the panel with the mineral wood were destructive.
- The use of polyurethane foam caused the integration of individual elements of the panel allowing it to behave as one element, increasing its strength and spatial rigidity.
- Damping properties of the polyurethane foam contributed to an increase in the dynamic resistance of the panel, since larger amount energy could be dissipated.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Parameter | Specification |
---|---|
Dimensions of the test sample | Cylinder with a height of 10 mm and a diameter of 12 mm |
Frequency range | From 1 Hz to 20 Hz |
Heating speed | 4 °C/min |
Temperature range | From −30 °C to +50 °C |
Frequency [Hz] | Storage Modulus [kPa] | Loss Modulus [kPa] | Tan Delta |
---|---|---|---|
1 | 2.10 | 1.81 | 0.86 |
10 | 7.65 | 0.65 | 0.10 |
20 | 8.45 | 0.25 | 0.025 |
Frequency [Hz] | Storage Modulus [kPa] | Loss Modulus [kPa] | Tan Delta |
---|---|---|---|
1 | 25.55 | 4.70 | 0.175 |
10 | 33.00 | 2.55 | 0.07 |
20 | 37.50 | 2.15 | 0.055 |
Element | Material | Density [kg/m3] | Elasticity Modulus [GPa] |
---|---|---|---|
Frame | Wood of class C24 | 509.8 | 11—along fibres 0.37—across fibres |
Sheathing | OSB3 | 713.8 | 1.98—along fibres 4.93—across fibres |
Filling 1 | Mineral wool | 39 | 0.0005 |
Filling 2 | Polyurethane foam | 26 | 0.01 |
Frequency [Hz] | Stiffness [kN/m] | Damping Ratio [%] |
---|---|---|
2.0 | 416.66 | 17.09 |
Frequency [Hz] | Stiffness [kN/m] | Damping Ratio [%] |
---|---|---|
2.0 | 549.58 | 22.25 |
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Szczepański, M.; Migda, W.; Jankowski, R. Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation. Appl. Sci. 2019, 9, 4387. https://doi.org/10.3390/app9204387
Szczepański M, Migda W, Jankowski R. Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation. Applied Sciences. 2019; 9(20):4387. https://doi.org/10.3390/app9204387
Chicago/Turabian StyleSzczepański, Marcin, Wojciech Migda, and Robert Jankowski. 2019. "Experimental Study on Dynamics of Wooden House Wall Panels with Different Thermal Isolation" Applied Sciences 9, no. 20: 4387. https://doi.org/10.3390/app9204387