Evaluating the Impact of Conservatism in Industrial Fatigue Analysis of Life-Limited Components

Joshua Hoole; Pia Sartor; Julian Booker; Jonathan Cooper; Xenofon, V.  Gogouvitis; R. Kyle Schmidt

doi:10.1051/matecconf/201816510017

Evaluating the Impact of Conservatism in Industrial Fatigue Analysis of Life-Limited Components

Joshua Hoole, Pia Sartor, Julian Booker, Jonathan Cooper, Xenofon, V. Gogouvitis, R. Kyle Schmidt

Research output: Contribution to conference › Conference Paper › peer-review

3 Citations (Scopus)

Abstract

This paper presents a review of the conservatism approaches applied by different industrial sectors to the stress-life (S-N) analysis of ‘life-limited’ or ‘safe-life’ components. A comparison of the fatigue design standards for 6 industrial sectors identified that the conservatism approaches are highly inconsistent when comparing the areas of variability and uncertainty accounted for along with the conservatism magnitude and method of application. Through the use of a case-study based on the SAE keyhole benchmark and 4340 steel S-N data, the industrial sector which introduces the greatest reduction of a component life-limit was identified as the nuclear sector. The results of the case-study also highlighted that conservatism applied to account for scatter in S-N data currently provides the greatest contribution to the reduction of component life-limits.

Original language	English
Pages	1
Number of pages	9
DOIs	https://doi.org/10.1051/matecconf/201816510017
Publication status	Published - 25 May 2018
Event	12th International Fatigue Congress (FATIGUE 2018) - Futuroscope, Poitiers, France Duration: 28 May 2018 → 1 Jun 2018 https://www.sf2m.fr/Fatigue2018/default.htm

Conference

Conference	12th International Fatigue Congress (FATIGUE 2018)
Country/Territory	France
City	Poitiers
Period	28/05/18 → 1/06/18
Internet address	https://www.sf2m.fr/Fatigue2018/default.htm

Keywords

Fatigue
Safe-life
Conservatism
Safety Factors

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10.1051/matecconf/201816510017Licence: CC BY

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Persistent link

Probabilistic Fatigue Methodology for Aircraft Landing Gear
Hoole, J. (Author), Booker, J. (Supervisor) & Cooper, J. (Supervisor), 23 Jun 2020
Student thesis: Doctoral Thesis › Doctor of Philosophy (PhD)

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title = "Evaluating the Impact of Conservatism in Industrial Fatigue Analysis of Life-Limited Components",

abstract = "This paper presents a review of the conservatism approaches applied by different industrial sectors to the stress-life (S-N) analysis of {\textquoteleft}life-limited{\textquoteright} or {\textquoteleft}safe-life{\textquoteright} components. A comparison of the fatigue design standards for 6 industrial sectors identified that the conservatism approaches are highly inconsistent when comparing the areas of variability and uncertainty accounted for along with the conservatism magnitude and method of application. Through the use of a case-study based on the SAE keyhole benchmark and 4340 steel S-N data, the industrial sector which introduces the greatest reduction of a component life-limit was identified as the nuclear sector. The results of the case-study also highlighted that conservatism applied to account for scatter in S-N data currently provides the greatest contribution to the reduction of component life-limits.",

keywords = "Fatigue, Safe-life, Conservatism, Safety Factors",

author = "Joshua Hoole and Pia Sartor and Julian Booker and Jonathan Cooper and Gogouvitis, {Xenofon, V.} and Schmidt, {R. Kyle}",

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T1 - Evaluating the Impact of Conservatism in Industrial Fatigue Analysis of Life-Limited Components

AU - Hoole, Joshua

AU - Sartor, Pia

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AU - Cooper, Jonathan

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AU - Schmidt, R. Kyle

PY - 2018/5/25

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N2 - This paper presents a review of the conservatism approaches applied by different industrial sectors to the stress-life (S-N) analysis of ‘life-limited’ or ‘safe-life’ components. A comparison of the fatigue design standards for 6 industrial sectors identified that the conservatism approaches are highly inconsistent when comparing the areas of variability and uncertainty accounted for along with the conservatism magnitude and method of application. Through the use of a case-study based on the SAE keyhole benchmark and 4340 steel S-N data, the industrial sector which introduces the greatest reduction of a component life-limit was identified as the nuclear sector. The results of the case-study also highlighted that conservatism applied to account for scatter in S-N data currently provides the greatest contribution to the reduction of component life-limits.

AB - This paper presents a review of the conservatism approaches applied by different industrial sectors to the stress-life (S-N) analysis of ‘life-limited’ or ‘safe-life’ components. A comparison of the fatigue design standards for 6 industrial sectors identified that the conservatism approaches are highly inconsistent when comparing the areas of variability and uncertainty accounted for along with the conservatism magnitude and method of application. Through the use of a case-study based on the SAE keyhole benchmark and 4340 steel S-N data, the industrial sector which introduces the greatest reduction of a component life-limit was identified as the nuclear sector. The results of the case-study also highlighted that conservatism applied to account for scatter in S-N data currently provides the greatest contribution to the reduction of component life-limits.

KW - Fatigue

KW - Safe-life

KW - Conservatism

KW - Safety Factors

U2 - 10.1051/matecconf/201816510017

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Y2 - 28 May 2018 through 1 June 2018

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Evaluating the Impact of Conservatism in Industrial Fatigue Analysis of Life-Limited Components

Abstract

Conference

Keywords

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Student theses

Probabilistic Fatigue Methodology for Aircraft Landing Gear

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