Shape-Memory-Alloy Meta-Composites: Harnessing material and topological phase transitions to achieve resilient and tunable lightweight structures
Abstract
The overall objective of this research is to develop the innovative concept of shape-memoryalloy(SMA) meta-composite, which is capable of tunable damping and reconfigurable dynamicproperties. This novel concept of a lightweight adaptive material will enable large reduction inbroadband vibrations and non-stationary dynamics, hence resulting in a considerably moreresilient structure and an extended fatigue life. The meta-composite consists in a layered materialmade out of both fibrous and shape-memory-alloy layers. The SMA layers can be furtherengineered by using periodic geometric patterning in order to confer metamaterials characteristicsto the whole composite. The proposed concept blurs the boundary between structures and materialsby exploring a new technology where a high-damping adaptive structural systems is achieved bythe concurrent and complementary use of two elements: 1) a novel class of low-cost, highperformance Shape Memory Alloys, and 2) geometric periodic tailoring of the SMA layers toachieve non-conventional dynamics and wave propagation characteristics proper of metamaterialtechnology.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 20, 2020
- Source ID
- N000142012608
Entities
People
- Fabio Semperlotti
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia