a general accelerated degradation model based on the wiener process

Clicks: 253
ID: 244998
2016
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Abstract
Accelerated degradation testing (ADT) is an efficient tool to conduct material service reliability and safety evaluations by analyzing performance degradation data. Traditional stochastic process models are mainly for linear or linearization degradation paths. However, those methods are not applicable for the situations where the degradation processes cannot be linearized. Hence, in this paper, a general ADT model based on the Wiener process is proposed to solve the problem for accelerated degradation data analysis. The general model can consider the unit-to-unit variation and temporal variation of the degradation process, and is suitable for both linear and nonlinear ADT analyses with single or multiple acceleration variables. The statistical inference is given to estimate the unknown parameters in both constant stress and step stress ADT. The simulation example and two real applications demonstrate that the proposed method can yield reliable lifetime evaluation results compared with the existing linear and time-scale transformation Wiener processes in both linear and nonlinear ADT analyses.
Reference Key
liu2016materialsa Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Le Liu;Xiaoyang Li;Fuqiang Sun;Ning Wang
Journal Nature Materials
Year 2016
DOI
10.3390/ma9120981
URL
http://www.mdpi.com/1996-1944/9/12/981
Keywords
uncertainty reliability wiener process electronics civil engineering (general)microscopydescriptive and experimental mechanics nuclear engineeringengineering (general) unit-to-unit variationtechnologyelectrical engineering

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