About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VI
|
Presentation Title |
Micro-mechanical Characterization of Geometric and Defect Dependent Responses in 3D Kirigami Polymer Structures |
Author(s) |
Jungkyu Lee, Kian Bashandeh, Andreas Polycarpou |
On-Site Speaker (Planned) |
Jungkyu Lee |
Abstract Scope |
Through the controlled buckling of 2D precursors drawing inspiration from kirigami, 3D micro-scale structures can be fabricated through highly scalable processes. By using shape memory polymer materials, these structures can undergo large elastic strains, making them suitable for a variety of applications in wearable electronics, energy generation and storage, sensors, and more. However, to optimize mechanical performance and reliability for such devices, a variety of factors must be evaluated including the geometry of the structure, presence of defects, and the performance under cyclic loading. To explore this, we utilized highly sensitive nanoindentation-based instruments to evaluate various geometries of three-dimensional shape memory polymer (SMP) structures composed of epoxy monomers. The load-displacement response and its hysteresis were determined for several conditions, including various pre-existing flaws and room temperature versus 72 °C. Finite element modeling was employed to accompany the experiment by analyzing the internal stress distribution of the structures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Energy Conversion and Storage |