A simplified compression test for the estimation of the Poisson's ratio of viscoelastic foams |
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| Affiliation: | 1. Fiber and Polymer Science Program, Department of Textile Engineering, Chemistry, and Science, College of Textiles, North Carolina State University, Raleigh, NC 27695, USA;2. Statistics Ph.D. Program, Department of Statistics, College of Sciences, Raleigh, NC 27695, USA;3. Textile Chemistry Program, Department of Textile Engineering, Chemistry and Science, College of Textiles, North Carolina State University, Raleigh, NC 27606, USA;1. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China;2. Institute of Rheological Mechanics, Xiangtan University, Xiangtan 411105, China;1. Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland;2. Center of Innovation and Research in Materials & Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials (LPCM), University of Mons (UMONS) & Materia Nova Materials R&D Center, Place du Parc 20, 7000, Mons, Belgium;3. Materials Research and Technology Department, Luxembourg Institute of Science and Technology (LIST), Z.A.E. Robert Steichen, 5 rue Bommel, L-4940 Hautcharage, Luxembourg;1. Polymer Division, School of Materials & Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia;2. On Study Leave from Faculty of Applied Sciences, Universiti Teknologi MARA, 02600 Arau, Perlis, Malaysia |
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| Abstract: | This paper describes a simplified procedure for determining the Poisson's ratio of homogeneous and isotropic viscoelastic materials. A cylindrical shaped material is axially excited by an electromagnetic shaker and consequent displacement waves are investigated. Using a frequency sweep as an excitation signal, the frequency domain displacement response is measured upstream and sideways of the sample itself. A plane cross-section analytical model of the experimental setup is used to estimate Poisson's ratio through a minimisation-based procedure, applied to radial displacement once the complex modulus has been directly determined under the assumption of spring-like behaviour of the axial displacement. The results are presented and discussed for different materials and compared to well-established quasi-static and finite element simulations. |
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| Keywords: | Viscoelastic materials Poisson's ratio Measurement methods |
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