Estimation of transient creep crack-tip stress fields for SE(B) specimen under elastic-plastic-creep conditions

Han Sang Lee; Jin Ho Je; Dong Jun Kim; Yun Jae Kim

doi:10.3795/KSME-A.2015.39.10.1001

Estimation of transient creep crack-tip stress fields for SE(B) specimen under elastic-plastic-creep conditions

Han Sang Lee, Jin Ho Je, Dong Jun Kim, Yun Jae Kim

Research output: Contribution to journal › Article › peer-review

Abstract

This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.

Original language	English
Pages (from-to)	1001-1010
Number of pages	10
Journal	Transactions of the Korean Society of Mechanical Engineers, A
Volume	39
Issue number	10
DOIs	https://doi.org/10.3795/KSME-A.2015.39.10.1001
Publication status	Published - 2015 Oct
Externally published	Yes

Keywords

Crack-Tip Stress Fields
Elastic-Plastic-Creep
FE Analysis
SEB Specimen
Transient Creep

ASJC Scopus subject areas

Mechanical Engineering

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10.3795/KSME-A.2015.39.10.1001

Cite this

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title = "Estimation of transient creep crack-tip stress fields for SE(B) specimen under elastic-plastic-creep conditions",

abstract = "This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.",

keywords = "Crack-Tip Stress Fields, Elastic-Plastic-Creep, FE Analysis, SEB Specimen, Transient Creep",

author = "Lee, {Han Sang} and Je, {Jin Ho} and Kim, {Dong Jun} and Kim, {Yun Jae}",

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Y1 - 2015/10

N2 - This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.

AB - This paper estimates the time-dependent crack-tip stress fields under elastic-plastic-creep conditions. We perform Finite-Element (FE) transient creep analyses for a Single-Edge-notched-Bend (SEB) specimen. We investigate the effect of the initial plasticity on the transient creep by systematically varying the magnitude of the initial step-load. We consider both the same stress exponent and different stress exponent in the power-law creep and plasticity to determine the elastic-plastic-creep behaviour. To estimation of the crack-tip stress fields, we compare FE analysis results with those obtained numerically formulas. In addition, we propose a new equation to predict the crack-tip stress fields when the creep exponent is different from the plastic exponent.

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KW - Transient Creep

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Estimation of transient creep crack-tip stress fields for SE(B) specimen under elastic-plastic-creep conditions

Abstract

Keywords

ASJC Scopus subject areas

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