A simple method to estimate elastic follow-up factors for transient creep parameter C (t) under secondary stress

Jinho Je; Kukhee Lee; Yunjae Kim; Dongwook Jerng

doi:10.1177/0309324716643194

A simple method to estimate elastic follow-up factors for transient creep parameter C (t) under secondary stress

Jinho Je, Kukhee Lee, Yunjae Kim, Dongwook Jerng

School of Mechanical Engineering

Research output: Contribution to journal › Review article › peer-review

7 Citations (Scopus)

Abstract

In this article, a semi-analytical method to estimate elastic follow-up factor as input to estimate the transient creep C(t) parameter under secondary loading is presented and validated against finite element results for a cracked two-bar structure under constant displacement loading. Predicted values of C(t) agree well with the finite element results for both elastic-creep cases and for elastic-plastic cases with the same creep and plastic hardening exponents. For elastic-plastic-creep cases with different creep and plastic hardening exponents, the proposed method gives good predictions at long time but can under- or over-predict C(t) at short time.

Original language	English
Pages (from-to)	336-346
Number of pages	11
Journal	Journal of Strain Analysis for Engineering Design
Volume	51
Issue number	5
DOIs	https://doi.org/10.1177/0309324716643194
Publication status	Published - 2016 Jul 1

Keywords

C (t) integral
Crack
elastic follow-up
secondary stress
transient creep

ASJC Scopus subject areas

Modelling and Simulation
Mechanics of Materials
Mechanical Engineering
Applied Mathematics

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10.1177/0309324716643194

Cite this

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title = "A simple method to estimate elastic follow-up factors for transient creep parameter C (t) under secondary stress",

abstract = "In this article, a semi-analytical method to estimate elastic follow-up factor as input to estimate the transient creep C(t) parameter under secondary loading is presented and validated against finite element results for a cracked two-bar structure under constant displacement loading. Predicted values of C(t) agree well with the finite element results for both elastic-creep cases and for elastic-plastic cases with the same creep and plastic hardening exponents. For elastic-plastic-creep cases with different creep and plastic hardening exponents, the proposed method gives good predictions at long time but can under- or over-predict C(t) at short time.",

keywords = "C (t) integral, Crack, elastic follow-up, secondary stress, transient creep",

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T1 - A simple method to estimate elastic follow-up factors for transient creep parameter C (t) under secondary stress

AU - Je, Jinho

AU - Lee, Kukhee

AU - Kim, Yunjae

AU - Jerng, Dongwook

N1 - Funding Information: This work was funded in part by the NASA Lewis Research Center, through Contract NAS 3-24227. Publisher Copyright: © Institution of Mechanical Engineers.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - In this article, a semi-analytical method to estimate elastic follow-up factor as input to estimate the transient creep C(t) parameter under secondary loading is presented and validated against finite element results for a cracked two-bar structure under constant displacement loading. Predicted values of C(t) agree well with the finite element results for both elastic-creep cases and for elastic-plastic cases with the same creep and plastic hardening exponents. For elastic-plastic-creep cases with different creep and plastic hardening exponents, the proposed method gives good predictions at long time but can under- or over-predict C(t) at short time.

AB - In this article, a semi-analytical method to estimate elastic follow-up factor as input to estimate the transient creep C(t) parameter under secondary loading is presented and validated against finite element results for a cracked two-bar structure under constant displacement loading. Predicted values of C(t) agree well with the finite element results for both elastic-creep cases and for elastic-plastic cases with the same creep and plastic hardening exponents. For elastic-plastic-creep cases with different creep and plastic hardening exponents, the proposed method gives good predictions at long time but can under- or over-predict C(t) at short time.

KW - C (t) integral

KW - Crack

KW - elastic follow-up

KW - secondary stress

KW - transient creep

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JF - Journal of Strain Analysis for Engineering Design

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A simple method to estimate elastic follow-up factors for transient creep parameter C (t) under secondary stress

Abstract

Keywords

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