test-specimens.md

title	Test Specimens
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Specimens for Mechanical Testing

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Design

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To characterize how negshell and structural cores change the stiffness of silicone rubber, we used ⌀16 mm x 11 mm hollow cylinder cores that are casted in a mold, creating a cylindrical specimens ⌀20 mm x 15 mm in size.

⌀16 mm x 11 mm Negshell Core

⌀20 mm x 15 mm Specimen Mold

Experimental Setup

We placed the cores under compression using a TA Instruments Electoforce 3200 Mechanical Tester. The specimens are first preloaded slightly and then compressed cyclicly. Further details about characterization are in the paper.

Video: Negshell Core Under Testing

Video: Structural Core Under Testing

Note: The testing shown is a mock trial for recording purposes, the specimen was incorrectly preloaded.