Figure 4.

a,b) Rigid 10 × 7 × 2 mm island (Sylgard 184) connected to two 10 × 7 × 2 mm substrate shoulders (Sylgard 184/Ecoflex‐0030 blends) at λ = 1 and λ = 1.5. c) Strains in island and shoulder, determined by manual measurements (dots) follow the Gent model (lines), which allows the prediction of individual strains in island and shoulders when combining elastomers with different Young's moduli. d‐e) Rigid island configuration with a Sylgard 184 island (10 × 7 × 2 mm) and Ecoflex 00–30 shoulders (10 × 7 × 2 mm) topped with a 1.5 mm wide 2 nm/100 nm Cr/Ag electrode on a 1.4 μm PET foil. The system was continuously stretched to twice its initial length (λ = 2) and relaxed at a velocity of 500 μm⋅s⁻¹ while monitoring the resistance progression of the electrode. f) Minimum (initial length) and maximum resistance (full elongation) (red) along with the mean over one full load cycle (blue). The initial resistance mean of 26.8 Ω doubled after ≈300 cycles and quadrupled after ≈950 full load cycles. After 4000 cycles, first visible cracks appeared.