Biaxial Mooney-Rivlin Coefficient of Silicone Sheet by Additive Manufacturing

This study evaluates the biaxial Mooney-Rivlin coefficient for silicone sheets made by additive manufacturing (AM) for custom wearable assistive devices and soft robotics. The extrusion-based layer-by-layer technique is applied for AM of moisture cured silicone sheets. A progressive cavity pump cont...

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Bibliographic Details
Published in:Procedia CIRP 2017, Vol.65, p.189-195
Main Authors: Putra, Ketut B., Plott, Jeff, Shih, Albert J.
Format: Article
Language:English
Subjects:
Additive Manufacturing
Biaxial Testing
Silicone Elastomer
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Summary:This study evaluates the biaxial Mooney-Rivlin coefficient for silicone sheets made by additive manufacturing (AM) for custom wearable assistive devices and soft robotics. The extrusion-based layer-by-layer technique is applied for AM of moisture cured silicone sheets. A progressive cavity pump controls the precise, continuous flow of high viscosity silicone for low void AM of the cruciform shaped specimen. A biaxial tensile test apparatus with four independent linear actuators was built for testing the cruciform specimens. Digital Image Correlation method was utilized to calculate the distribution of strain. This study show the value of the biaxial Mooney-Rivlin coefficient for the AM silicone sheet is independent of the thickness and in the range of 114.7kPa to 132.1kPa for C10 and –17.9kPa to –9.04kPa for C01. The geometry of the specimen is shown to affect the biaxial quality of the specimen.
ISSN:2212-8271
2212-8271
DOI:10.1016/j.procir.2017.04.049