Figure A4.

Experimental apparatus and experimental data for material parameter test: (a) an universal mechanical tester (INSTRON 5944); (b) a home-made peel platform with an angle-adjustable jig, in which the X or Z-motion of the translation stage is able to be driven by two independent linear/electric actuators, and its Y-motion depends on a manually single axis table; (c) stress-strain curve for PVC sticker in tension test; and (d) peel force for PVC sticker in peel test with peel angle $\beta ={135}^{\circ }$ and peel rate $v_{\mathrm{peel}}=1 \mathrm{mm}/\mathrm{s}$.