Kinking Nonlinear Elastic Solids for Load Bearing Damping and Strain Sensing Applications
Abstract
In this proposal we attacked the problem of kinking nonlinearity using a number of techniques and approaches. We used nanoindentation, modeling and simple compression experiments on a variety of materials that ranged from the hexagonal metals such as Co and Mg to mica, BaTiO3, graphite to the MAX phases. In modeling we showed, in a PRB paper, for the first time, that KNE hysteresis can be well modeled/described by the powerful Preisach-Mayergoyz model that has been successfully used for many years to describe other hysteresis phenomena, such as magnetism. We now routinely use our KNE model to measure the CRSS of basal dislocations in polycrystalline solids from a simple compression experiment - another first - and showed it to follow a Hall-Petch relationship. With colleagues at Florida Institute of Technology, we developed a powerful nanoscale continuum calculation of basal dislocation core structures in graphite. This work is the first step towards developing a robust model for, first, kink boundaries and ultimately incipient kink bands. We also developed - and filed for patents for - Mg/Ti2AlC composites with exceptional combinations of strengths, stiffness, machinability and damping. In an important paper to geologists we showed that not only is mica a KNE solid, but as important its KNE response is a function of its defect concentration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 2011
- Accession Number
- ADA545946
Entities
People
- Michel Barsoum
Organizations
- Drexel University