Direct method on creep fatigue damage assessment considering full creep-cyclic plasticity interaction

Daniele Barbera, Haofeng Chen, Weiling Luan

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

This paper introduces the latest research and development of the Linear Matching Method (LMM) on the creep fatigue damage assessment of components subjected to high temperature and cyclic load conditions. The method varies from existing rule-based approaches in both the ASME Boiler and Pressure Vessel Code (NH) and the UK R5 high temperature assessment procedure, where the creep behavior /creep damage and cyclic plastic response /fatigue damage are analyzed separately. In support to these the extended Direct Steady Cycle Analysis (eDSCA) has been proposed to provide a more accurate description of the potentially dangerous interaction between creep and cyclic plasticity during the load cycle, and hence is able to accurately address creep enhanced plasticity and cyclically enhanced creep.
The applications of the LMM eDSCA method for creep fatigue damage assessment to three practical problems are then outlined to demonstrate that the proposed direct method is capable of predicting an accurate component life due to creep fatigue and creep ratcheting damages by modeling cyclic plasticity and creep interaction using this new simplified direct method, providing a degree of accuracy and convenience in creep fatigue assessment hitherto unavailable and without the restrictions inherent in other methodologies.
Original languageEnglish
Pages1-9
Number of pages9
DOIs
Publication statusPublished - 16 Jul 2017
EventASME Pressure Vessels & Piping Conference 2017 - Hilton Waikoloa Village, Waikoloa, Hawaii, United States
Duration: 16 Jul 201720 Jul 2017
Conference number: 2017
https://www.asme.org/events/pvp

Conference

ConferenceASME Pressure Vessels & Piping Conference 2017
Abbreviated titleASME PVP
CountryUnited States
CityWaikoloa, Hawaii
Period16/07/1720/07/17
Internet address

Keywords

  • linear matching method (LMM)
  • creep
  • fatigue
  • creep fatigue interaction
  • cyclic plasticity

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