| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 802713 | Mechanics of Materials | 2015 | 11 Pages |
•Approach for modeling high pressure thermo-oxidative conditioning (epoxy resin).•Correlation between chemical and mechanical properties (accelerated ageing).•Accelerated thermo-oxidation tests and EIT measures for samples tested up to 8 bars.•Oxygen pressure as a pertinent accelerating parameter for thermo-oxidation degradation.
This paper presents an approach for modeling high pressure thermo-oxidative conditioning, for an epoxy resin material.A coupled reaction–diffusion chemical “mechanistic” model of thermo-oxidation with classical boundary conditions, successfully applied for samples aged under air at atmospheric pressure but failing at high pressures, has been enhanced by formulating a new nonlinear sorption law, correlated with the results of Elastic Indentation modulus (EIT) measures at 5 bars of pure oxygen, and validated for pressures up to 8 bars of pure oxygen.The approach allows justifying the employment of the oxygen pressure as a pertinent accelerating parameter for thermo-oxidation degradation: moreover the proposed model can be employed for the design and the optimization of accelerated thermo-oxidation tests.
