Validation of linear damage rules using random loading
Fatigue damage is a parameter which plays an important role in lifetime and reliability predictions of randomly loaded structures. In this paper, four different forms of the Miner linear accumulation damage rule are examined. They are used to compare observed experimental damage and the results of numerical simulations for both uniaxial and multiaxial fatigue. First, critical fatigue damage values for all forms of the Miner accumulation damage rule are calculated for uniaxial cases. Based on the results presented in this paper, it has been established that for high strength materials the critical damage value is around 0.3. These results are then applied to the multiaxial cases. The multiaxiality is taken into account using either the signed von Mises or critical plane method. Finally, the fatigue fracture surface has been calculated and compared to the experimental pattern of fatigue fracture. The results show that the fatigue fracture surface determined by the numerical simulation is comparable to the fatigue fracture observed experimentally.
2017
2018-11-19 09:28:41
1033
damages, multiaxial, fatigue, critical plane, signed von Mises
poškodbe, večosnost, utrujanje, kritična ravnina
dk_c
Mitja
Franko
70
Marko
Sedlaček
70
Bojan
Podgornik
70
Marko
Nagode
70
UDK
4
531(045)
ISSN pri članku
9
1056-7895
DOI
15
10.1177/1056789515605881
COBISS_ID
3
14219547
RAZ_Franko_Mitja_i2017.pdf
2999881
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2018-11-19 09:30:10
0
Izvorni URL
2018-11-19 09:28:48