Elastic follow-up factors to estimate C(t) under secondary loading

Kuk Hee Lee, Yun Jae Kim, Robert A. Ainsworth, David Dean

研究成果: Conference contribution

抄録

This paper proposes a method to determine the elastic follow-up factors for C(t)-integral under secondary stress. The rate of creep crack growth for transient creep is correlated with C(t)-integral. The elastic follow-up behaviour, which occurs in structures under secondary loading, prevents a relaxation of stress during transient creep. Thus, both the value of C(t) and creep crack growth increase with an increasing elastic follow-up. An estimation solution for C(t) has been proposed by Ainsworth and Dean based on the reference stress method. In order to predict the value of C(t) using this solution, an independent method to determine the elastic follow-up factors for cracked bodies is required. This paper proposes that the elastic follow-up factors for C(t) can be determined by elastic-plastic analyses by using the plastic-creep analogy. Finite element analyses have been performed to verify this method.

本文言語English
ホスト出版物のタイトルASME 2012 Pressure Vessels and Piping Conference, PVP 2012
ページ241-247
ページ数7
DOI
出版ステータスPublished - 2012
外部発表はい
イベントASME 2012 Pressure Vessels and Piping Conference, PVP 2012 - Toronto, ON, Canada
継続期間: 2012 7月 152012 7月 19

出版物シリーズ

名前American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
1
ISSN(印刷版)0277-027X

Conference

ConferenceASME 2012 Pressure Vessels and Piping Conference, PVP 2012
国/地域Canada
CityToronto, ON
Period12/7/1512/7/19

ASJC Scopus subject areas

  • 機械工学

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