Characterizing In-Situ Matrix Properties of Polymer Composites Using Digital Volume Correlation (DVC) and Modeling; Static and Fatigue Loading
Abstract
In this project, the matrix properties and the fatigue response of fiber reinforced laminated composites is experimentally investigated with a view to developing a physics based numerical model. Different length scales at which damage accumulates is examined. At the fiber/matrix scale digital volume correlation is adopted in an in-situmicroCT facility to measure internal 3D strains associated with the onset of splitting in zero fiber plies, (fiber/matrix cracking parallel to the fibers) and matrix cracking in theorthogonal 90 degree plies. Furthermore, these measurements, taken for a notched composite show the sequence of damage mechanisms - delamination first, followed by splitting or vice-versa. At the laminate scale, these mechanisms are seen to manifest in a similar manner. An IR camera is used for the laminate scale tests to measure the evolving temperature fields in fatigue loading and also as a clear indicator of the local temperature rise associated with matrix cracks. The results clearly capture the failure mechanisms, the 3D strain fields of importance, the temperature fields and the failure loads all of which aid in the verification and validation of a physics based numerical model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 11, 2024
- Accession Number
- AD1230460
Entities
People
- Anthony Waas
Organizations
- Board of Regents of the University of Michigan