Comparison between strain-based and energy-based creep failure simulation

Seung Jae Kim, Young Ryun Oh, Yun-Jae Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The power plant is required to operate under high temperature and pressure for high efficiency. In order to predict reliable life time of power plant under high temperature, creep-low cycle fatigue life prediction method should be proposed. In this paper, strain based and energy based failure model are proposed to simulate notch bar creep tensile test. Modification factors considering multiaxial fracture and strain rate effect were proposed in order to simulate notch bar creep tensile test using FE analysis. Using proposed models, FE result of strain based and energy based damage model are compared with notch bar creep tensile test. As a result, both strain and energy based damage model simulates crack growth well during creep, However, when tertiary creep behavior is considered, energy based failure model simulate rupture time longer than strain based model. It can be inferred that plastic damage accumulation of energy based model is slower than that of strain based model.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume6A-2018
ISBN (Electronic)9780791851678
DOIs
Publication statusPublished - 2018 Jan 1
EventASME 2018 Pressure Vessels and Piping Conference, PVP 2018 - Prague, Czech Republic
Duration: 2018 Jul 152018 Jul 20

Other

OtherASME 2018 Pressure Vessels and Piping Conference, PVP 2018
CountryCzech Republic
CityPrague
Period18/7/1518/7/20

Fingerprint

Creep
Power plants
Strain rate
Crack propagation
Fatigue of materials
Plastics
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Kim, S. J., Oh, Y. R., & Kim, Y-J. (2018). Comparison between strain-based and energy-based creep failure simulation. In Materials and Fabrication (Vol. 6A-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201884569

Comparison between strain-based and energy-based creep failure simulation. / Kim, Seung Jae; Oh, Young Ryun; Kim, Yun-Jae.

Materials and Fabrication. Vol. 6A-2018 American Society of Mechanical Engineers (ASME), 2018.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kim, SJ, Oh, YR & Kim, Y-J 2018, Comparison between strain-based and energy-based creep failure simulation. in Materials and Fabrication. vol. 6A-2018, American Society of Mechanical Engineers (ASME), ASME 2018 Pressure Vessels and Piping Conference, PVP 2018, Prague, Czech Republic, 18/7/15. https://doi.org/10.1115/PVP201884569
Kim SJ, Oh YR, Kim Y-J. Comparison between strain-based and energy-based creep failure simulation. In Materials and Fabrication. Vol. 6A-2018. American Society of Mechanical Engineers (ASME). 2018 https://doi.org/10.1115/PVP201884569
Kim, Seung Jae ; Oh, Young Ryun ; Kim, Yun-Jae. / Comparison between strain-based and energy-based creep failure simulation. Materials and Fabrication. Vol. 6A-2018 American Society of Mechanical Engineers (ASME), 2018.
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