Elastomer biaxial characterization using bubble inflation technique. I: Experimental investigations

Abstract : The biaxial rheological behavior of materials such as elastomers or polymers can be obtained using a bubble-inflation-technique. A circular membrane is clamped at the rim and expanded under gas pressure. The inflation of the circular membrane is recorded using a CCD video camera and the blowing pressure by a pressure sensor. Then, from elongation and curvature radius measurements at the pole of the bubble, one can deduce equibiaxial stress-strain data. This study describes the optimization of a bubble-inflation rheometer. The most sensitive point of the technique is the estimation of the elongation at the bubble pole, deduced from video camera measurements. A direct measurement of the bubble thickness was performed using a magnetic probe in order to validate rheometer results. Such a validation has evidently never been carried out before. Results of quasi-static equibiaxial characterization of elastomers are presented and analyzed.
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N Reuge, Fabrice Schmidt, Yannick Le Maoult, M Rachik, F Abbe. Elastomer biaxial characterization using bubble inflation technique. I: Experimental investigations. Polymer Engineering and Science, Wiley-Blackwell, 2001, 41 (3), pp.522-531. ⟨10.1002/pen.10749⟩. ⟨hal-01709517⟩

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