This paper presents a finite element numerical method to assess the stress state and gradients induced by thermo-oxidative ageing in Ti/epoxy/Ti adhesively bonded joints for aircraft engine applications. The is dealing with couplings between thermal, chemistry mechanics occurring during high-temperature of joint, taking into account post-curing stresses, under mechanical loading. Calculations a...

the thermo-oxidative degradation of two viscous liquid resins of 1,2- poly-butadiene  (1,2-pbd) and 1,4- polybutadiene  (1,4-pbd) have been studied by differential scanning calorimetry (dsc) and thermogravimetry analy-sis  (tga). to  study  further,  the  effect of flm  thickness on oxidation kinetics was periodically studied by tracing the weight of the samples to make comparison with dsc resu...

The extraction and quantitative analysis of low molar mass compounds in polymers is an analytical challenge. It is also important from a practical point of view because the low molar mass compounds in time will migrate from the polymers into the surrounding environment. It is especially important to gain knowledge about the migrating compounds in applications such as medical implants, packaging...

In this paper, the thermal oxidation of polyamide 6,6 between 140°C and 200°C is evaluated. The aim study to correlate modifications polymer properties on scales ranging from molecular macroscopic. Chemical structure changes are monitored by infrared UV-visible spectroscopies. microstructure evaluated using DSC while molar mass evolution determined SEC measurements. Vickers µ-hardness used asse...

An adaptive approach for coupling detailed kinetics with computational fluid dynamics (CFD) has been formulated to permit reactive flow simulations with improved computational efficiency. The approach makes use of a set of reduced mechanisms, each of which has been developed to reproduce the mixture kinetics under well-characterized thermo-chemical conditions. In the present implementation, the...