Uniting wave propagation and mechanistic stiffness of ductile, composite interfaces: ultrasonic characterization and acoustic metamaterial design
Abstract
Surfaces in mechanical components are often a location of discontinuous motion, contamination, stress concentrations at asperity contacts, and material defects. This makes them particularly susceptible to failures such as yielding and corrosion. Interfaces between such surfaces redistribute stress and add dissipative losses through friction or plasticity. However, the multi-scale mechanics ofsuch composite interfaces is still largely unknown: current theories are unable to predict local yield progression of composite interfaces, and experimental characterizations are currently limited to the elastic regime in single-material interfaces. The project objectives are to build a new fundamental understanding of composite metallic interfaces using ultrasonic characterization and leverage this to control mechanical energy propagation by controlling the local yield progression. Anticipated outcomes are a fundamental understanding of interfacial mechanics in composite interfaces for general material classes, new ultrasonic characterization capabilities, and new acoustic metamaterials based on composite interfaces. This project will provide critical fundamental knowledge on interfacial mechanics and dynamics of naval-relevant composite interfaces that will serve as foundations to enable new naval technologies. Approved for Public Release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 08, 2024
- Source ID
- N000142412632
Entities
People
- Kathryn H Matlack
Organizations
- Office of Naval Research
- United States Navy
- University of Illinois Urbana–Champaign