Abstract
This paper characterizes the elastic-plastic-creep crack-tip stress fields under load and displacement control. The stress field has been calculated from finite element (FE) transient creep analysis under each load control condition and displacement control condition. Varying the magnitude of initial step load is considered to investigate the influence of plasticity to creep. Both same stress exponent and different stress exponent in power-law creep and plasticity were considered. In the displacement control condition, elastic-follow-up factor is estimated by comparing FE results with existing formula. This paper proposes an equation to predict crack-tip stress fields under transient creep using a modification of the existing formula and verifies the proposed equation by comparing with FE results.
| Original language | English |
|---|---|
| Pages (from-to) | 832-839 |
| Number of pages | 8 |
| Journal | Procedia Structural Integrity |
| Volume | 2 |
| DOIs | |
| Publication status | Published - 2016 |
Bibliographical note
Funding Information:This research was supported by National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning. (NRF-2013M2A7A1076396, NRF-2013M2B2B1075733)
Publisher Copyright:
Copyright © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
Keywords
- Crack-tip stress fields
- Elastic-plastic-creep
- Load control and displacement control condition
- Single-edge-cracked bend specimen
ASJC Scopus subject areas
- Civil and Structural Engineering
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
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