Characterising the frequency-response of ultra-soft polymers with the Virtual Fields Method
This paper presents a novel apparatus, combined with application of the Virtual Fields Method (VFM) for the high frequency characterisation of the mechanical response of ultra-soft materials. The viscoelastic response is characterised under harmonic deviatoric loading at a range of frequencies using...
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| Format: | Journal article |
| Idioma: | English |
| Publicat: |
Wiley
2021
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| Sumari: | This paper presents a novel apparatus, combined with application of the Virtual Fields Method (VFM) for the high
frequency characterisation of the mechanical response of ultra-soft materials. The viscoelastic response is characterised
under harmonic deviatoric loading at a range of frequencies using the dynamic VFM in the frequency domain. Obtaining
useful high rate data on soft materials is challenging using typical test methodologies, as the low speed of sound in the
material makes stress equilibrium difficult to obtain; additionally, the low stiffness results in small stresses and weak
measurement signals. This novel apparatus and analysis method has been shown capable of obtaining important material
characterisation data that would be impossible to access using currently existing test techniques. |
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