Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis
Abstract
:1. Introduction
2. Methodology
2.1. Materials
2.2. Tensile Testing
2.3. Dynamic Mechanical Analysis
2.4. Finite Element Analysis
3. Results
3.1. Theoretical Modeling
3.2. Experimental Tensile Testing
3.3. Dynamic Mechanical Analysis
3.4. Finite Element Analysis
4. Discussion—Influence of Poisson’s Ratio
5. Conclusions
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- Given that the Poisson’s ratio may change due to external stimulation (e.g., temperature, loading, time, etc.) there is an error associated with the consideration of its value as constant during the DMA test;
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- The error is more prominent in situations where Poisson’s ratio increases significantly, and is attributed to shape variations in the specimen, especially in conditions where the final Poisson’s ratio approximates an isochoric (ν ~ 0.5) behavior;
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- It is suggested that the evolution of this technology should consider Poisson’s ratio as a variable to eliminate this error in future material characterization.
Author Contributions
Funding
Conflicts of Interest
References
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Chemical Composition | Specimens | |||
---|---|---|---|---|
Component A (Resin) |
| Dimension | Value (mm) | SD (mm) |
Thickness | 1.23 | 0.08 | ||
Component B (Hardener) |
| Width | 4.51 | 0.08 |
Length | 30.20 | 0.11 |
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Carneiro, V.H.; Puga, H. Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis. Technologies 2018, 6, 81. https://doi.org/10.3390/technologies6030081
Carneiro VH, Puga H. Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis. Technologies. 2018; 6(3):81. https://doi.org/10.3390/technologies6030081
Chicago/Turabian StyleCarneiro, Vitor H., and Helder Puga. 2018. "Temperature Variability of Poisson’s Ratio and Its Influence on the Complex Modulus Determined by Dynamic Mechanical Analysis" Technologies 6, no. 3: 81. https://doi.org/10.3390/technologies6030081