Simple Calculation Technique of Nominal Stress / Strain in Biaxial Tensile Testing of Rubber Materials

Abstract

In-plane biaxial testing produces a two-dimensional stress-state that can be used to characterize the mechanical behavior of rubber materials. A technique is proposed of calculating nominal stress and strain from the tensile load-displacement data measured in a biaxial testing. The technique is characterized by its simple concept and the evaluation formula with high accuracy. The validity of the technique is verified through the numerical and experimental investigations.