Mechano‐Activated Shape Morphing of Aluminum–Plastic Laminate Composites
Chien Nguyen,
Karthik Ramalingam,
Zachary Kushnir
et al.
Abstract:Many “metallized plastic” packaging films bend if stretched and released. Such behavior can be reproduced in laminate composites prepared by bonding aluminum foil to an adhesive polymer sheet. We show that such bending occurs because stretching deforms the aluminum layer permanently (i.e. plastically), whereas the polymer layer deforms elastically. Upon releasing, the aluminum‐polymer composite then resolves the strain mismatch by bending, with the aluminum on the convex side of the bend. The curvature is foun… Show more
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