Uniting wave propagation and mechanistic stiffness of ductile, composite interfaces: Mechanics of yield progression through in situ experiments
Abstract
Surfaces of 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, fatigue, and corrosion. Interfaces between such surfaces redistribute stress and add dissipative losses through friction or plasticity. However, the multi-scale mechanics of such composite interfaces is still largely unknown: current theories are unable to predict local yield progression of composite interfaces, and experimental characterizationsare 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 new theories of interfacial stiffness representing the aggregate response over many asperities together with implementing precise measurements of quasi-static interfacial stiffness in experiments compressively loading highly-engineered interfaces. Anticipated outcomes are a fundamental understanding of interfacial mechanics in composite interfaces for general material classes, and contact and friction mechanics in normal and shear-loaded rough interfaces. This project will provide critical fundamental knowledge on interfacial mechanics and dynamics ofnaval-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
- N000142412620
Entities
People
- Alison Dunn
Organizations
- Office of Naval Research
- United States Navy
- University of Florida