Fig. 3

a, b Young’s moduli evaluated by tensile tests for samples made from pure materials and mixed materials, where cubical particles have been included to a VeroClear matrix. All matrix-inclusion composites have a lower Young’s modulus than the volume-averaged mean of the primary materials. A linear interpolation between the pure materials was added as a visual aid. c, d Stress-strain curves from tensile tests. Thin lines represent the individual measurements. Thick lines show the average value of the measurements. Vertical lines at the highest elongation of each curve mark the rupture of the samples