Temporarily Out of Stock Online Please check back later for updated availability. Overview After an introductory chapter in which an overview of the book is provided, the following chapters are devoted to derive models for the S-N fields for fixed and varying stress level, the -N fields, the relations between the two, and an analysis of the size effect in fatigue problems. Next, crack growth models are derived based on fracture mechanics, statistical and common sense considerations, which lead to functional equations providing non-arbitrary models.

Two different approaches are given, leading to two classes of models, the intersection class of which is derived through compatibility analysis. Then the compatibility of the S-N curves and the crack growth models, which are two aspects of the same fatigue problem, are used to obtain a model which allows both approaches to be connected. Finally, the problem of selecting damage measures is analyzed, and some are identified and proposed as the most convenient, including the probability of failure and a normalized measure related to the percentile curve.

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This leads to very simple and useful damage accumulation rules, which are illustrated with some examples. Product Details Table of Contents. Show More. Average Review.

## Download A Unified Statistical Methodology For Modeling Fatigue Damage

Write a Review. Without requesting the Weibull parameters this gives advice for the choice of a suitable stress range for subsequent fatigue tests. The compatibility condition is a prerequisite for guaranteeing validity in the present model the same as for the derivation of any models proposed for the assessment of the different lifetime problems.

As a consequence, an application of the ProFatigue program to complex fatigue problems is possible if the adequate damage parameter, for instance Fatemi-Socie, SWT, AJ, etc. This allows the results of all these phenomena to be handled in a probabilistic way.

## A Unified Statistical Methodology for Modeling Fatigue Damage / Edition 1

In particular, an application to the definition of the LCF region can be contemplated [7]. The necessity of using energetic parameters seems to confirm the unsuitability of the stress range, as conventional primary parameter, when local plasticity effects are present in the fatigue process and the presumable energetic character of the damage induced by fatigue [8]. The definition of the S-N field, identifying percentile curves with curves representing different initial crack sizes, i. Simultaneous calculation of the Miner number and the normalized variable, which is related to probability of failure, allows to relate the cumulative damage provided by the Miner number to probability of failure.

Castillo, A. Free download at dcif. Users Guide: dcif. Koller, M. Ruiz-Ripoll, A.

Garcia, A. Fernandez-Canteli, E.

Castillo, Experimental validation of a statistical model for the Wohler field corresponding to any stress level and amplitude, International Journal of Fatigue 31 Fernandez-Canteli, H. Pinto, M. Lopez-Aenlle, A general regression model for statistical analysis of strain-life fatigue data, Materials Letters 62 - Castillo, H.

- Fatigue Crack Propagation Rates Prediction Using Probabilistic Strain‐Based Models?
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Fernandez-Canteli, C. Przybilla, J. Correia, A. Fernandez-Canteli, Local unified probabilistic model for fatigue crack initiation and propagation: Application to a notched geometry, Engineering Structures 52 - Abstract of research paper on Materials engineering, author of scientific article — A. Przybilla, M.

Nogal, M. Similar topics of scientific paper in Materials engineering , author of scholarly article — A.

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Castillo Using statistical compatibility to derive advanced probabilistic fatigue models. Przybillaa, M. Nogalb, M.

## Ebook A Unified Statistical Methodology for Modeling Fatigue Damage Download Online

Lopez Aenllea, E. Introduction In most of the models used for the derivation of S-N and e-N fields from assessment of experimental fatigue data the probability of failure is not explicitly included though the high scatter of the lifetime at the different stress ranges requires its consideration. The ProFatigue program In order to facilitate the applicability of the model to the practical assessment of the S-N field from fatigue data, the free use software program ProFatigue is developed [3]. It permits all S-N data to be pooled as pertaining to a single distribution so that the model parameters are estimated with higher reliability.

H 0. Applications to the e-N field Since the basic physical and statistical considerations used to derive the Weibull S-N model also apply in the case of the s-N field, due to the parallelism in the functional problem being dealt with, the same Weibull regression model 10 10 10 Lifetime [cycles] 10 10 Lifetime [cycles] Fig. Further achievements of the ProFatigue program The following achievements are also provided by the ProFatigue program: 4. Support for fatigue program planning The ProFatigue program facilitates optimizing planning of testing programs by means of an adequate testing strategy cluster, cascade or mixed methodology have been already investigated.

Applicability of the ProFatigue program to assessment of complex fatigue problems The compatibility condition is a prerequisite for guaranteeing validity in the present model the same as for the derivation of any models proposed for the assessment of the different lifetime problems. Support for probabilistic cumulative damage calculation The definition of the S-N field, identifying percentile curves with curves representing different initial crack sizes, i.