Description
Controlled buckling enables stretchable characteristic for brittle materials by integrating stiff device films on a soft substrate. Being permeable to fluids, the soft substrate, however, cannot encapsulate the device well and the system is also hard to be integrated with liquid components. In addition, the strength of the device system with a soft substrate is unsatisfactory in many biomedical applications. By introducing a bilayer substrate, we are able to provide a robust, high strength system while maintaining the stretchable characteristic, with a soft layer on top of a relatively stiff layer in the substrate. Theoretical investigation shows the design requirement for each substrate layer and it can guide the experimental design for a device to be used in a target application.
Recommended Citation
Cheng, H., & Huang, Y. (2014). Buckling of stiff thin film on a prestrained bilayer substrate. In A. Bajaj, P. Zavattieri, M. Koslowski, & T. Siegmund (Eds.). Proceedings of the Society of Engineering Science 51st Annual Technical Meeting, October 1-3, 2014 , West Lafayette: Purdue University Libraries Scholarly Publishing Services, 2014. https://docs.lib.purdue.edu/ses2014/mss/mtfmm/17
Buckling of stiff thin film on a prestrained bilayer substrate
Controlled buckling enables stretchable characteristic for brittle materials by integrating stiff device films on a soft substrate. Being permeable to fluids, the soft substrate, however, cannot encapsulate the device well and the system is also hard to be integrated with liquid components. In addition, the strength of the device system with a soft substrate is unsatisfactory in many biomedical applications. By introducing a bilayer substrate, we are able to provide a robust, high strength system while maintaining the stretchable characteristic, with a soft layer on top of a relatively stiff layer in the substrate. Theoretical investigation shows the design requirement for each substrate layer and it can guide the experimental design for a device to be used in a target application.