On the Design, Modeling, and Fabrication of Hydrostatically Activated Negative Stiffness Inclusions
Abstract
Structures with non-convex potential energy functions that exploit mechanical instabilities possess local deformation states that correspond to negative stiffness. Only a dilute concentration of such inclusions offers the potential to create a composite material with simultaneously favorable acoustic and mechanical properties. This report iterates on aspects of design, numerical modeling, and fabrication of several example negative stiffness inclusions with mechanical instabilities. Additive manufacturing is utilized to fabricate the complex structures, which requires material characterization to ensure accurate numerical modeling. Different test inclusions are fabricated to inform the design of new structures and theassociated numerical modeling to achieve the intended response. Numerical modeling of the nonlinear deformation of both inclusions and composite materials containing such inclusions within a hyperelastic host material are considered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 21, 2021
- Accession Number
- AD1137909
Entities
People
- Stephanie G. Konarski
Organizations
- United States Naval Research Laboratory