Validation of linear damage rules using random loading

Franko, Mitja (avtor), Sedlaček, Marko (avtor), Podgornik, Bojan (avtor), Nagode, Marko (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: damages, multiaxial, fatigue, critical plane, signed von Mises
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2017
• Št. strani: Str. 463-479
• Številčenje: Vol. 26, iss. 3
• PID: 20.500.12556/RUL-105273
• UDK: 531(045)
• ISSN pri članku: 1056-7895
• DOI: 10.1177/1056789515605881
• COBISS.SI-ID: 14219547
• Datum objave v RUL: 19.11.2018

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: poškodbe, večosnost, utrujanje, kritična ravnina

Projekti

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