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Setup and Characterisation

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LLindenroth edited this page Jun 11, 2020 · 8 revisions

Materials are characterised according to the ASTM D412 testing standard which dictates dumbbell-shaped specimen. CAD files of the moulds used to create said specimen are provided here.

Fabrication of the Specimen

Elastomer_Fabrication_Step

Specimen are fabricated according to the following protocol.

  1. Mixing of the two components given the correct ratio specified by the manufacturer
  2. De-airing mixture using a vacuum chamber
  3. Pouring or injecting the mixture into 3d printed moulds
  4. Curing for at least 24h
  5. Verifying the correct dimensions
  6. Inspecting the specimen for imperfections such as trapped air bubbles

Tensile Tests Raw Data

animated_tensile_test

Experimental tensile stress-strain data are available in the repository under the folder:

https://github.com/LucMarechal/Soft-Robotics-Materials-Database/tree/master/Tensile-Tests-Data

Constitutive Model Curve Fitting Script

An open source online app is available to fit experimental tensile stress-strain data :

Written in Python, the code is availlable in the repository under the folder: https://github.com/LucMarechal/Soft-Robotics-Materials/tree/master/Python%20script%20fitting%20of%20hyperelastic%20constitutive%20models

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