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Title:
Probability function of fatigue crack growth in case of material overloading
Authors:
ID
Gubeljak, Nenad
(
Author
)
ID
Legat, Janko
(
Author
)
Files:
http://www.dlib.si/details/URN:NBN:SI:doc-C9ZOK42X
Language:
English
Work type:
Not categorized
Typology:
1.01 - Original Scientific Article
Organization:
FS - Faculty of Mechanical Engineering
Abstract:
Studies of structural components under a fatigue environment including overloads are rather interesting in engineering practice today. One important task is to determine the probability distribution function in consideration of two failure modes by a selected fatigue load and overload level. The probability density function permits to evaluate of overloading under fatigue environment on the residual life or to predict the failure of a component. The fatigue crack propagation in case of overloading can be modeled by the Markov's process. The obtained probability functions describe the probability of retarded crack growth propagation as a consequence of the overload cycle.
Keywords:
utrujenostno širjenje razpoke
,
verjetnostna funkcija
,
Markov proces
,
fatigue crack propagation
,
probability function
,
Markov's process
Publisher:
Inštitut za kovinske materiale in tehnologije
Year of publishing:
1998
Number of pages:
str. 503-505
Numbering:
Letn. 32, št. 6
PID:
20.500.12556/DKUM-53306
UDC:
539.42:624.94
ISSN on article:
1318-0010
COBISS.SI-ID:
92330
NUK URN:
URN:SI:UM:DK:51ORJAZJ
Publication date in DKUM:
10.07.2015
Views:
2227
Downloads:
43
Metadata:
Categories:
Misc.
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Record is a part of a journal
Title:
Kovine zlitine tehnologije
Shortened title:
Kovine zlit. tehnol.
Publisher:
Inštitut za kovinske materiale in tehnologije
ISSN:
1318-0010
COBISS.SI-ID:
31742209
Secondary language
Language:
English
Title:
Verjetnostna funkcija utrujenostnega širjenja razpoke v primeru preobremenitve materiala
Abstract:
Utrujenostno širjenje razpoke na konstrukcijskih materialih ali elementih v primeru preobremenitve je danes deležno intenzivnega raziskovanja, kajti z lokalno preobremenitvijo je mogoče hitrost utrujenostnega širjenja razpoke upočasniti ter s tem delno podaljšati dobo funkcionaalnega obratovanja konstrukcije. Za kvalitataivno ocenitev je potrebno določiti verjetnostno porazdelitveno funkcijo s katero lahko primerjamo zanesljivost utrujenostnega širjenja razpoke pod monotonim dinamičnim obremenjevanjem brez in z enim preobremenitvenim nihanjem. Če z verjetnostno funkcijo zajamemo učinek preobremenitve, takrat lahko napovemo preostalo življensko dobo oziroma porušitev konstrukcijskega elementa. Za izpeljavo verjetnostne funkcije je opisano utrujenostno širjenje razpoke s procesom Markova. Dobljena verjetnostna funkcija verjetnostno opisuje upočasnitev utrujenostnega širjenja razpoke kot posledico preobremenitvenega cikla.
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