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We consider possibility of embedding large sheets of polymer piezoelectricsin clothing for sensing and energy harvesting for wearable electronicapplications. Power is generated by the crumpling of clothes due to human bodymovements. From the mechanics of a gently crumpled foil we develop theoreticalmodels and scaling laws for the open circuit voltage and short circuit currentand verify via experiments. It is concluded that stretching is the dominantcharge generation mechanism with the open circuit voltage and short circuitcurrent scaling as $l^{i}$ and $l^{i-1}(\mbox{d}l/\mbox{d}t)$, respectivelywith $1\leq i\leq 4/3$ and $l$ the height of the crumple cone.

Crumpling for Energy: Modeling Generated Power from the Crumpling of Polymer Piezoelectric Foils for Wearable Electronics