Failure Times in Space: A Statistician's Perspective

2002 ◽  
Author(s):  
Hubert A. Allen, Jr.
Keyword(s):  
Failure Times

Load-Sharing Reliability Models with Different Component Sensitivities to Other Components’ Working States

2021 ◽  
Vol 53 (1) ◽  
pp. 107-132
Author(s):  
Tomasz Rychlik ◽  
Fabio Spizzichino
Keyword(s):  
Order Statistics ◽  
Load Sharing ◽  
Single Component ◽  
Generalized Order Statistics ◽  
Hazard Rates ◽  
System Operation ◽  
Reliability Models ◽  
Mixtures Of Distributions ◽  
Failure Times ◽  
Generalized Order

AbstractWe study the distributions of component and system lifetimes under the time-homogeneous load-sharing model, where the multivariate conditional hazard rates of working components depend only on the set of failed components, and not on their failure moments or the time elapsed from the start of system operation. Then we analyze its time-heterogeneous extension, in which the distributions of consecutive failure times, single component lifetimes, and system lifetimes coincide with mixtures of distributions of generalized order statistics. Finally we focus on some specific forms of the time-nonhomogeneous load-sharing model.

A mixed control chart for monitoring failure times under accelerated hybrid censoring

2020 ◽  
Vol 48 (1) ◽  
pp. 138-153
Author(s):  
Muhammad Aslam ◽  
Muhammad Ali Raza ◽  
Rehan Ahmad Khan Sherwani ◽  
Muhammad Farooq ◽  
Jun Yong Jeong ◽  
...  
Keyword(s):  
Control Chart ◽  
Hybrid Censoring ◽  
Failure Times ◽  
Mixed Control

scholarly journals Time-dependent cross ratio estimation for bivariate failure times

Biometrika ◽  
2011 ◽  
Vol 98 (2) ◽  
pp. 341-354 ◽  
Author(s):  
T. Hu ◽  
B. Nan ◽  
X. Lin ◽  
J. M. Robins
Keyword(s):  
Cross Ratio ◽  
Time Dependent ◽  
Ratio Estimation ◽  
Failure Times

Time to failure modeling of carbon fiber reinforced polymer composites subject to simultaneous tension and one-sided heat flux

2018 ◽  
Vol 52 (18) ◽  
pp. 2503-2514 ◽  
Author(s):  
D Swanson ◽  
J Wolfrum
Keyword(s):  
Heat Flux ◽  
Carbon Fiber ◽  
Tensile Load ◽  
Combined Loading ◽  
Fiber Reinforced Polymers ◽  
Time To Failure ◽  
Fiber Reinforced ◽  
Mechanical Loads ◽  
Failure Times ◽  
Carbon Fiber Reinforced

This study focuses on observing and analyzing the time to failure of carbon fiber reinforced polymers subject to mechanical loading and one-sided heat flux simulating fire damage. The purpose of this investigation is to understand the rate of thermal degradation and mechanical property loss from fire exposure, resulting in catastrophic failure under simultaneous tensile loading. Composite samples of varying thicknesses and layup patterns are subject to a constant tensile load below the ultimate strength of the material. A thermal load is applied to one side by an infrared band heater, emitting a constant heat flux. The time to failure is monitored to determine how long the material can withstand this combined loading condition. A consistent trend is observed for various heat flux settings. High mechanical loads contribute to a shorter time to failure, and low mechanical loads contribute to a longer time to failure. Similarly, higher heat flux settings result in shorter failure times, and lower heat flux settings result in longer failure times. Temperature profiles are created based on heat flux exposure time and position through the sample thickness, establishing failure criteria for different loading conditions. The resulting trends are observed and extrapolated to create a predictive model using an Arrhenius exponential decay function.

Relationships Between Electrochemical Measurements and Stress Corrosion Cracking of Maraging Steel

CORROSION ◽  
1967 ◽  
Vol 23 (1) ◽  
pp. 5-10 ◽  
Author(s):  
J. A. S. GREEN ◽  
E. G. HANEY
Keyword(s):  
Yield Strength ◽  
Stress Corrosion ◽  
Maraging Steel ◽  
Stress Corrosion Cracking ◽  
Electrode Potential ◽  
Full Range ◽  
Corrosion Cracking ◽  
Deionized Water ◽  
Failure Times ◽  
Ph Values

Abstract Stress corrosion cracking of 18Ni maraging steel foil has been studied in deionized water solutions with the pH adjusted by NaOH additions over a range from 8 to 13. The full range of NaCl contents from saturated solutions to no addition was tested with specimens stressed to 75 percent of yield strength. For each variation in NaCl content, the specimen failure times go through a minimum with respect to pH. With increasing NaCl content, the minimum becomes more pronounced and its position shifts towards higher pH values. The position of each minimum is indicated by electrode potential measurements. Potentiostatic measurements as a function of pH confirm that maximum susceptibility to stress corrosion cracking occurs just prior to the onset of passivation.

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