Predictive Methods for Large-Scale Progressive Damage in Structural Composites for Aircraft Applications
Abstract
Prognosis is the general pursuit of predicting future performance on the basis of current assessment and history of behavior. The focus of this research is very different from the traditional concept of prognosis. We are concerned with heterogeneous materials which have meso-phases that are very brittle, e.g., woven fiber reinforced polymer composites. Large (nonlinear) strains occur in such materials, and are responsible for important performance characteristics. Prognosis requires that we follow the mechanisms and extent of the extensive damage accumulation. We considered non-uniform distributions of damage caused by out-of-plane bending, and introduce a new method of following material state change, based on multi-physics formulations. Specifically, we use electrochemical impedance spectroscopy to follow and understand conductivity changes as a second material property that varies with changes of state. With this new methodology, we address the question of how to predict futureperfom1ance based on understandings of material state changes induced by prior service.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 07, 2009
- Accession Number
- AD1026386
Entities
People
- Kenneth J. Reifsnider
- Paul Fazzino
- Prasun K. Majumdar
Organizations
- University of South Carolina