Abstract
A multidisciplinary approach focused on models and processes to predict the performance and life expectancy of high-temperature polymer matrix composite (HTPMC) materials used in a variety of aerospace applications is being developed. Emphasis is on the implementation and extension of hierarchical models to represent the polymer behavior/properties as a function of the degradation state. Neat resin specimens of high-temperature polyimide PMR-15 have been evaluated for various aging conditions. Characterization of the properties of the polyimide is focused on development of a constitutive law for use in a micromechanical analysis to predict the behavior of PMR-15 reinforced composites. Thermo-oxidative aging is simulated with a diffusion-reaction model in which temperature, oxygen concentration and weight loss effects are considered. One-dimensional simulations illustrate oxidative layer growth for neat resin specimens. Comparisons and correlations with experimental observations of oxidation layer growth are presented.
Original language | English |
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Pages (from-to) | 1861-1869 |
Number of pages | 9 |
Journal | Polymer Degradation and Stability |
Volume | 91 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2006 |
Keywords
- Aging
- Degradation
- Durability
- Thermal oxidation