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Time accelerated method prediction

Lifetime Prediction of Elastomer for Radiation-Induced Degradation by Time Accelerated Method... [Pg.70]

This method, if carefiiUy studied, may offer a better accelerated method and has been particularly applied to emulsions. The assumption is also made here that, by increasing the g-force, the rate of sedimentation or creaming is significantly increased, and that this could be applied to predict the process from measurement at short time periods. [Pg.444]

At the same time computational methods based on the molecular mechanics, molecular dynamics (MD), Monte Carlo (MC) and ab initio methods evolved to the high level of predictive capability, accelerating development of new materials with designed properties. For the multicomponent and multiphase systems (e.g., nanocomposites, blends, composites with properties adjusted by incorporation of intercalants or compatibilizers) the most promising is the hierarchical multi-scale molecular modeling (MSMM). Thus, while such molecular simulations as MD or MC efficiently analyze the molecular structure at 0.1-10 nm, MSMM,... [Pg.51]

One way to do this is afforded by the predictor-corrector method. We ignore terms higher than those shown explicitly, and calculate the predicted terms starting with bP(t). However, this procedure will not give the correct trajectory because we have not included the force law. This is done at the corrector step. We calculate from the new position rP the force at time t + St and hence the correct acceleration a (t -f 5t). This can be compared with the predicted acceleration aP(f -I- St) to estimate the size of the error in the prediction step... [Pg.63]

Time to rupture can be predicted by using the accelerated times generated by the creep data, and the creep-rupture characteristic generated by performing twelve of these tests over a range of loads. Conventional long-term creep strain and creep-rupture tests have so far confirmed the validity of the predictions for polyester fibres. Comments on the method have been published by Greenwood and Voskamp [10]. [Pg.111]

The benefit of neutrality has yet to be captured with in vitro protein evolution. Neutral theory predicts the punctuated emergence of novel structure and function, however, with current methods, the required time scale is not feasible. Utilizing neutral evolution to accelerate the discovery of new functional and structural solutions requires a theory that predicts the behavior of mutational pathways between networks. Because the transition from neutral to adaptive evolution requires a multi-mutational switch, increasing the mutation rate decreases the time required for a punctuated change to occur. By limiting the search to... [Pg.153]

Two different approaches for lifetime prediction are presented. The underlying lifetime limiting processes have been identified in two cases. Mathematical expressions of chemical/physical relevance were used for the lifetime predictions for PE hot-water pipes and cables insulated with plasticized PVC. Accelerated testing, extrapolation and validation of the extrapolation by assessment of the remaining lifetime of objects aged during service conditions for 25 years were successfully applied to cables insulated with chlorosulfonated polyethylene. Polyolefin pipes exposed to chlorinated water showed a very complex deterioration scenario and it was only possible to find a method suitable for predicting the time for the depletion of the stabilizer system. [Pg.185]


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Time accelerated method

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