Estimation of the opening load under variable amplitude loading

Moreno, B.; López-Crespo, P.; Cruces, Alejandro S.; Domı́nguez, J.

doi:10.1111/ffe.13108

Cited by 3 publications

(1 citation statement)

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“…The problem of fatigue failure probability under variable amplitude load history is more complicated, but various studies are limited to specific parts or structures with multi-site damage rarely being taken into account [27][28][29][30]. In the early stage, based on energy criterion, a method to estimate the reliability life of parts under random load was provided by Kliman et al [31], in which S-N curve, cyclic stress-strain curve, standard deviation and probability density distribution of load history, as well as rain-flow counting method are applied to obtain the cyclic load spectrum block.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Reliability Analysis of a Compressor Disk Based on Probability Cumulative Damage Criterion

Ren

Zhao

2020

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The reliability of aero engine has a direct impact on the flight safety of the whole plane. With the continuous improvement of performance requirements of aero engines, the related fatigue and reliability problems also appear. For the fatigue failure characteristics of the typical component (compressor disk) in an aero engine, the fatigue reliability of its multi-site damage structure in service is analyzed by using probability cumulative damage criterion in this paper. The probability distribution definitions of life, damage and damage threshold are discussed and the relationship among them is also introduced by the new proposed criterion. Meanwhile, a method to determine the probability distribution of cumulative damage threshold and probability life prediction is carried out, based on which a hierarchical index system of statistical analysis and reliability modeling principle on the system level is further constructed for compressor disk. At the end of the paper, a certain cruise of fighter plane is analyzed to verify the validity of the new model. Emphasizing the difference between the compressor disk and traditional component, the new reliability analysis model developed in this study is basically reasonable for most of the load histories for the compressor disk, other than the traditional one, especially for the changeable and complex cruise missions.

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Section: Introductionmentioning

confidence: 99%