Graded Kirigami Composites for Programmed Strain Distributions
Abstract
Stretchable devices and components have emerged as a vital platform for wearable electronics, biomedical sensors, and soft robotics. However, the soft‐rigid interfaces that arise when integrating rigid components with soft and deformable substrates can cause stress concentrations, leading to premature failure of devices at these multi‐material interfaces. Here, a stiffness‐graded kirigami composite is introduced to control strain transitions at soft‐rigid interfaces. The graded composite consists of soft elastomers bonded to rigid kirigami films with defined beam architectures to tune the stiffness gradient along the loading direction. Kirigami geometry is designed by coupling finite element analysis with experimental digital image correlation to achieve diverse strain profiles for flexible interfaces. Furthermore, an inverse design method is utilized to determine kirigami patterns to obtain predefined strain fields. These stiffness‐graded kirigami composites create opportunities for more robust soft‐rigid interfaces and defect‐tolerant stretchable devices and robots.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 04, 2021
- Source ID
- 10.1002/admt.202101241
Entities
People
- A. Haque
- Dohgyu Hwang
- Michael D. Bartlett
Organizations
- Defense Advanced Research Projects Agency
- Office of Naval Research
- Virginia Tech