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Theoretical framework for estimating a product's reliability using a variable-amplitude loading spectrum and a stress-based approach
Moral Portalés, Rubén (Avtor), Bochons Sania, María del Mar (Avtor), Klemenc, Jernej (Avtor)

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Izvleček
An innovative approach for predicting the reliability of a structure that is subject to a variable-amplitude dynamic load is presented. In this approach, a Gassner durability curve with its scatter is modelled using a 2-parametric Weibull's probability density function (PDF). The trend of the Gassner durability curve is modelled with a general hyperbola equation in a log-log scale. The hyperbola equation is applied to represent the durability curve for the 63.2% probability of fatigue failure that describes the dependency of the Weibull's scale parameter on the loading spectrum's maximum stress. Equations are derived to link the parameters of the hyperbola curve to the material's S-N curve and the loading spectrum. The Weibull's shape parameter is estimated from the scatter of the material's S-N curve. The proposed Gassner-curve model is applied to calculate the fatigue reliability from the PDF of the loading spectrum's maximum stress and the PDF of the durability-curve's amplitude stress for the selected number of loading-cycles-to-failure. Method for predicting reliability of the structures with a spectrum loading is presented. Durability curve and its scatter are modelled with a 2-parametric Weibull's PDF. Scale parameter of the Weibull's PDF is modelled using a general hyperbola equation. Reliability is calculated on the basis of the modelled durability curve with its scatter.

Jezik:Angleški jezik
Ključne besede:durability curve, fatigue life reliability, S‐N curve, variable‐amplitude loading, 2‐parametric Weibull PDF
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2018
Št. strani:Str. 1662-1673
Številčenje:Vol. 41, iss. 8
UDK:620.178.32(045)
ISSN pri članku:8756-758X
DOI:10.1111/ffe.12804 Povezava se odpre v novem oknu
COBISS.SI-ID:15958811 Povezava se odpre v novem oknu
Število ogledov:643
Število prenosov:406
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Gradivo je del revije

Naslov:Fatigue & fracture of engineering materials & structures
Skrajšan naslov:Fatigue fract. eng. mater. struct.
Založnik:Wiley
ISSN:8756-758X
COBISS.SI-ID:584210 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P2-0182
Naslov:Razvojna vrednotenja

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:23.03.2018

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:krivulja trajnosti, zanesljivost življenjske dobe utrujenosti, krivulja S-N, obremenitev s spremenljivo amplitudo, 2-parametrični Weibull PDF

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