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  • Když jsou materiály zatěžovány cyklickými silami s nenulovým středním napětím, deformace obvykle rostou ve směru středního napětí s rostoucím počtem cyklů. Tomuto druhu akumulace deformace se říká cyklický creep nebo ratcheting. Tento fenomén silně závísí na mnoha faktorech a jeho přesné numerické modelování je problematické, zváště při neproporcionálním zatěžování. Dvě modifikace AbdelKarim Ohno modelu byly popsány pro lepší výsledky simulací ratchetingu. Navržený modifikace byly implementovány do komerčního MKP programu Ansys. V tomto článku byly uvedené modely verifikovány na množině úloh popsaných v článku Chen et al. Modely předpovídají ratcheting poměrně dobře ve všech testovaných případech. (cs)
  • When materials are subjected to cyclic plastic loading with nonzero mean stress, strain usually accumulates in the direction of mean stress with an increasing number of cycles. This kind of strain accumulation is called cyclic creep or ratcheting. The phenomenon strongly depends on many factors and its accurate numerical medelling is problematic, expecially under nonproportional loading. Two modifications of AbdelKarim Ohno cyclic plasticity model were proposed for better ratchenting simulation. The developed model was implemented into the commericial FE software ANSYS using a radial return method. In this paper, hte model capability is verified on a set of axial/rotational loading path taken form Chen et al. The model predicts ratcheting strain reasonably well for almost all test cases.
  • When materials are subjected to cyclic plastic loading with nonzero mean stress, strain usually accumulates in the direction of mean stress with an increasing number of cycles. This kind of strain accumulation is called cyclic creep or ratcheting. The phenomenon strongly depends on many factors and its accurate numerical medelling is problematic, expecially under nonproportional loading. Two modifications of AbdelKarim Ohno cyclic plasticity model were proposed for better ratchenting simulation. The developed model was implemented into the commericial FE software ANSYS using a radial return method. In this paper, hte model capability is verified on a set of axial/rotational loading path taken form Chen et al. The model predicts ratcheting strain reasonably well for almost all test cases. (en)
Title
  • A Modification of AbdelKarim-Ohno Model for Fatcheting Simulations
  • Modifikace modelu AbdelKarim Ohno pro simulaci ratchetingu (cs)
  • A Modification of AbdelKarim-Ohno Model for Fatcheting Simulations (en)
skos:prefLabel
  • A Modification of AbdelKarim-Ohno Model for Fatcheting Simulations
  • Modifikace modelu AbdelKarim Ohno pro simulaci ratchetingu (cs)
  • A Modification of AbdelKarim-Ohno Model for Fatcheting Simulations (en)
skos:notation
  • RIV/61989100:27230/08:00018270!RIV09-MSM-27230___
http://linked.open...avai/riv/aktivita
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  • Z(MSM6198910027)
http://linked.open...iv/cisloPeriodika
  • 3
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  • 354260
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  • RIV/61989100:27230/08:00018270
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  • finite element method; simulation; czclic plasiticity; ratcheting (en)
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  • HR - Chorvatská republika
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  • [F275C5882E63]
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  • Technical Gazette
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  • 15
http://linked.open...iv/tvurceVysledku
  • Halama, Radim
http://linked.open...n/vavai/riv/zamer
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  • 1330-3651
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  • 27230
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