Comparing Fatigue Life Estimates Using Experimental and Spectral Density Based Probability Distributions

Spottswood, S. Michael; Wolfe, H. F.

doi:10.2514/2.2955

Cited by 9 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only the Type IV distribution from the Pearson family (8) meet the condition of unlimited variable u.…”

Section: A Pearson and Johnson Distributionsmentioning

confidence: 99%

“…If the fluctuating pressure excitation and, as a result, the skin panel response are erroneously assumed to have a Gaussian PDF, then the well-known spectral-based cycle counting techniques [7,8,9] may lead to an inaccurate fatigue life prediction. The relation between the probability distribution of instantaneous values of the fluctuating pressure considered in this study and the PDF of stress/strain cyclic ranges governing accumulation of fatigue damage in a structural component is as follows.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-Gaussian Analysis of Turbulent Boundary Layer Fluctuating Pressure on Aircraft Skin Panels

Steinwolf

Rizzi

2006

Journal of Aircraft

View full text Add to dashboard Cite

The purpose of the study is to investigate the probability density function (PDF) of turbulent boundary layer fluctuating pressures measured on the outer sidewall of a supersonic transport aircraft and to approximate these PDFs by analytical models. Experimental flight results show that the fluctuating pressure PDFs differ from the Gaussian distribution even for standard smooth surface conditions. The PDF tails are wider and longer than those of the Gaussian model. For pressure fluctuations in front of forwardfacing step discontinuities, deviations from the Gaussian model are more significant and the PDFs become asymmetrical. There is a certain spatial pattern of the skewness and kurtosis behavior depending on the distance upstream from the step. All characteristics related to non-Gaussian behavior are highly dependent upon the distance from the step and the step height, less dependent on aircraft speed, and not dependent on the fuselage location. A Hermite polynomial transform model and a piecewise-Gaussian model fit the flight data well both for the smooth and stepped conditions. The piecewise-Gaussian approximation can be additionally regarded for convenience in usage after the model is constructed.

show abstract

“…Only the Type IV distribution from the Pearson family (8) meet the condition of unlimited variable u.…”

Section: A Pearson and Johnson Distributionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-Gaussian Analysis of Turbulent Boundary Layer Fluctuating Pressure on Aircraft Skin Panels

Steinwolf

Rizzi

2006

Journal of Aircraft

View full text Add to dashboard Cite

show abstract

Experimental investigation on fatigue of blade specimen subjected to resonance and effect of a damping hard coating treatment

Chen

Zhu

Zhai

2021

J. Cent. South Univ.

View full text Add to dashboard Cite

Effect of clearances in rolling element bearings on their dynamic performance, quality and operating life

2019

View full text Add to dashboard Cite

Comparing Fatigue Life Estimates Using Experimental and Spectral Density Based Probability Distributions

Cited by 9 publications

References 6 publications

Non-Gaussian Analysis of Turbulent Boundary Layer Fluctuating Pressure on Aircraft Skin Panels

Non-Gaussian Analysis of Turbulent Boundary Layer Fluctuating Pressure on Aircraft Skin Panels

Experimental investigation on fatigue of blade specimen subjected to resonance and effect of a damping hard coating treatment

Effect of clearances in rolling element bearings on their dynamic performance, quality and operating life

Contact Info

Product

Resources

About