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Showing 1 to 20 of 107 for “"life-prediction"”.
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Isothermal Fatigue Life Prediction Techniques
… in advancing a pre-existing energy-based fatigue life prediction method into a powerful tool for real-world application through three distinct analyses, resulting in considerable improvements to the fidelity and capability of the existing model. First, a torsional fatigue life prediction method …
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Contact fatigue : life prediction and palliatives
… and limits of a fracture mechanics based life prediction is explored. Comparisons are made against highly controlled experiments and less controlled but more realistic experiments using a novel dovetail attachment fixture. Surface engineering approaches are examined from a mechanics …
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Fatigue life prediction on nickel base superalloys
… the UTS and YS models, a Low Cycle Fatigue (LCF) life model has been developed with promising initial results.<br/>Crack initiation at high temperatures has been studied in CMSX4 in both air and vacuum environments, to elucidate the effect of oxidation on the notch fatigue initiation process. In …
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Prognostic modelling for residual useful life prediction
… prognosis aims at predicting the residual useful life ofcomponents using condition monitoring information. It enables a projection ofcomponent condition from the past and present into the future, providing significantassistance to maintenance decision making and asset management. An inaccurate …
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Computer aided fatigue life prediction for polymers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Reliability analysis and service life prediction of pipelines
… model are developed and applied for service life prediction of the pipes. The obtained results are verified by using Monte Carlo simulation technique. Sensitivity analysis is also performed to identify the most important parameters that affect pipe failure. For each type of the pipelines both …
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A variable amplitude multiaxial fatigue life prediction method
A method to estimate the fatigue life of a component subjected to variable amplitude multiaxial loading has been developed. It is based upon an extension of the strain-life approach which achieved success in correlating the fatigue lives of components subjected to uniaxial variable amplitude …
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Buried Pipe Life Prediction in Sewage Type Environments
In this study, we develop a method of life prediction of buried pipe using the concepts of a characteristic damage state and damage accumulation. A stress analysis corresponding to the different types of load during service with environmental effects, a moisture diffusion model, and a lifetime …
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Strength and Life Prediction of FRP Composite Bridge Deck
… Strength, failure mode and fatigue life prediction methodologies for a cellular FRP bridge deck are presented in this dissertation.
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A Study on Remaining Useful Life Prediction for Prognostic Applications
<p> <p>We consider the prediction algorithm and performance evaluation for prognostics and health management (PHM) problems, especially the prediction of remaining useful life (RUL) for the milling machine cutter and lithium ‐ </p> </p> <p> <p>ion battery. We modeled battery as a voltage source and …
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Evolutionary Optimization of Neural Architectures for Remaining Useful Life Prediction
Remaining useful life (RUL) predictions are a key enabler to achieving efficient maintenance in the context of Industry 4.0. Data-driven approaches, in particular employing deep neural networks (DNNs), have shown success in the RUL prediction task. However, although their architecture considerably …
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A microstructure based fatigue life prediction framework and its validation
… results in the scatter observed in the fatigue life. In this work, a robust microstructure based fatigue framework is developed, which takes into account i) the statistical variability of the material's microstructure, ii) the continuum scale complex heterogeneous 3D stress and strain states …
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A Fatigue Life Prediction Method for Tensile-Shear Spot Welds
An empirical Three Stage Initiation-Propagation (TSIP) model has been developed which predicts the fatigue resistance of tensile-shear spot welds under constant amplitude loading test. The TSIP model consists of Stage I--fatigue crack initiation and early growth, Stage II--through sheet thickness …
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Life Prediction of Composite Armor in an Unbonded Flexible Pipe
… application. The current study focuses on the life prediction of a PPS/AS-4 carbon fiber composite proposed for the above employment. In order to accomplish this task, the properties of the material were experimentally characterized at varying temperatures, aging times and loadings. An analytic …
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Life prediction of spot-welds: a fatigue crack growth approach
A life prediction method is developed for spot-welds subject to fatigue loading. Stress intensity factors are used with the Walker equation to develop two crack growth approaches to the problem. The predictions fit data for lap joint configurations well, but not so for peel joint geometries.
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Fatigue, fracture, and life prediction criteria for composite materials in magnets
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1990.
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Life prediction of fiber-reinforced composites: macro- and micro-mechanical modeling
In homogenous materials the life of a component is controlled by damage associated with a single crack while that of non-homogenous materials is the result of a distributed damage state. The life prediction of composite materials is thus carried out using damage mechanics two common approaches of …
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Durability Assessment and Service Life Prediction of Concrete in Extreme Aggressive Environment
… correlations and based on the target service life, the research aims to set appropriate thresholds for Surface Resistivity (SR) and Bulk Resistivity (BR) tests, which will be used to qualify concrete mixes used in in extremely aggressive chloride environments. To achieve these objectives, the …
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