The paper deals with numerical and experimental results of the gradient based optimized biaxial X0-specimen. The original, engineering based design has been optimized under producibility restrictions for two different loading conditions to gain a distinct (high or low) stress triaxiality maintaining a sufficiently homogeneous distribution in the notched regions of the specimen. Specimens with the initial and the two load case dependent optimized geometries have been fabricated of aluminum alloy sheets and biaxially tested. Here the corresponding results with respect to biaxial tension loading are presented and the numerical results clearly indicate the higher stress triaxialities and the experimental results demonstrate elevated void growth as leading damage mechanism.    «

The paper deals with numerical and experimental results of the gradient based optimized biaxial X0-specimen. The original, engineering based design has been optimized under producibility restrictions for two different loading conditions to gain a distinct (high or low) stress triaxiality maintaining a sufficiently homogeneous distribution in the notched regions of the specimen. Specimens with the initial and the two load case dependent optimized geometries have been fabricated of aluminum alloy...    »