Material testing 2.0 for viscoelasticity : characteristic time sensitivity vs experiment duration

3D-printed polymers are viscoelastic materials that exhibit time-dependent mechanical behavior requiring identification of many parameters over several time scales. A recent approach referred to as "Material testing 2.0" (MT2.0) is based on optimizing the testing conditions for identifying consti- tutive parameters with inverse methods. This study examines the sensitivities to constitutive viscoelastic parameters sought to determine Maxwell parameters for a range of time scales with a single test by Integrated Digital Image Correlation (I-DIC).