Exploring the Fundamental of Fatigue in Composites: Opportunities using X-Ray Computed Tomography Imaging
Abstract
The aim of this work emerges from the need to understand damage mechanisms in composite materials, in terms of onset, growth and propagation, and assess fatigue life behavior, using advanced computed tomography techniques. X-ray computed tomography (XCT) has become extremely useful for material science and structural materials studies, due to its capability to allow 3-D reconstruction of the specimen with high resolution, facilitating accurate microstructural and micromechanical characterization of materials. Since fatigue damage in composite laminates is distinctly three-dimensional in character, XCT appears to be a very promising technique to evaluate the micromechanics of fatigue development. The purpose of this project is to exploit XCT and in situ cyclic loading to assess damage and to establish its links with composite residual strength, and assess damage interaction with matrix toughening particles used in aerospace-grade composites. Experimental data will provide information with which numerical models will be calibrated and validated. This first annual report of the planned 3-year project provides literature review of micromechanics of fatigue damage in composites, overview of XCT imaging, initial results of tension-tension fatigue tests conducted with laboratory and synchrotron-based CT, and qualitative comparison of micromechanical damage between quasi-static and cyclic loading scenarios. Plans for continued study over the next two years are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2012
- Accession Number
- ADA570215
Entities
People
- Ian Sinclair
- S. M. Spearing
- Serafina C. Garcea
Organizations
- University of Southampton