| As the use of advanced composite materials has grown in various industries, the diversity of materials has provided many scenarios resulting in unfavorable material combinations. Until recently, it has been very difficult to evaluate the microscale gradients in properties that are a result of unfavorable material interactions, and as such, has been difficult to diagnose these problems until in-service failures occurred. With the development of microscale thermal analysis techniques, it has become possible to thoroughly interrogate the interphase regions between composite reinforcing fibers, matrix resin, and bonding adhesive materials. This work undertook a unified approach to evaluating various interphase regions generated in composite and adhesive materials, and examining their effects on the macroscale mechanical and thermal properties of the materials. Through the methodologies developed, it is possible to better understand the test methods that can be used to determine the best combination of materials for a given application. Collectively, this work represents a step forward in advancing the determinate design of composite materials, as well as increasing the capabilities for the analysis of these materials. |
