I work on FEA of elastomer seals and we test the material in house for material data. For tensile testing, we use the cross head speed of 50 mm/min where as our colleagues in Germany use 1 mm/min. The reasoning behind 1mm/min is to get the relaxed behavior however the instantaneous response and high rate loading deformation is compromised. Since it really depends on the application as to which speed is more appropriate I was wondering if others have across similar problem. If we use 50 mm/min data along with the viscoelastic response, would the solution be more reasonable for any application or any loading rate?