Details
| Original language | English |
|---|---|
| Article number | 118005 |
| Number of pages | 19 |
| Journal | Engineering structures |
| Volume | 308 |
| Early online date | 13 Apr 2024 |
| Publication status | Published - 1 Jun 2024 |
Abstract
Over the decades, the constant life diagram has become an important tool for engineering design and assessment. For specific materials, the effect of mean stress and stress amplitude on the fatigue life is considered in traditional constant life diagrams. In this study, the concept of the structural constant creep-fatigue life diagram is proposed for engineering structures subjected to cyclic loads in high-temperature environments. By integrating constant fatigue and creep-fatigue life curves into the traditional Bree diagram, we offer an efficient and reliable approach that enables quick determination of structural life and corresponding failure mechanisms. To provide a one-stop solution for the evaluation of constant fatigue/creep-fatigue life curves, an extended Unified Procedure for Fatigue and Ratchet Analysis (eUPFRA) has been proposed based on the Linear Matching Method (LMM) framework. Case studies on engineering components have also been performed with consideration of the cyclic hardening effect, temperature-dependent material properties and various damage models. The impact of the target life and creep dwell time is further investigated, as well as the creep-fatigue interaction mechanism. Verification against ABAQUS step-by-step inelastic analysis has finally been conducted, confirming the precision and efficiency of the eUPFRA.
Keywords
- Constant life diagram, Creep, Direct methods, Finite element analysis, Low cycle fatigue
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering structures, Vol. 308, 118005, 01.06.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Extended constant life diagrams for low cycle fatigue and creep-fatigue assessments of high-temperature structures
AU - Ma, Zhiyuan
AU - Fu, Zhuojia
AU - Chen, Haofeng
AU - Wang, Xiaoxiao
AU - Barbera, Daniele
N1 - Funding Information: The authors gratefully acknowledge the supports from the National Natural Science Foundation of China (52150710540, 52375145), the National Key R&D Program of China (2023YFF0614903), Hohai University, East China University of Science and Technology and University of Strathclyde during the course of this work.
PY - 2024/6/1
Y1 - 2024/6/1
N2 - Over the decades, the constant life diagram has become an important tool for engineering design and assessment. For specific materials, the effect of mean stress and stress amplitude on the fatigue life is considered in traditional constant life diagrams. In this study, the concept of the structural constant creep-fatigue life diagram is proposed for engineering structures subjected to cyclic loads in high-temperature environments. By integrating constant fatigue and creep-fatigue life curves into the traditional Bree diagram, we offer an efficient and reliable approach that enables quick determination of structural life and corresponding failure mechanisms. To provide a one-stop solution for the evaluation of constant fatigue/creep-fatigue life curves, an extended Unified Procedure for Fatigue and Ratchet Analysis (eUPFRA) has been proposed based on the Linear Matching Method (LMM) framework. Case studies on engineering components have also been performed with consideration of the cyclic hardening effect, temperature-dependent material properties and various damage models. The impact of the target life and creep dwell time is further investigated, as well as the creep-fatigue interaction mechanism. Verification against ABAQUS step-by-step inelastic analysis has finally been conducted, confirming the precision and efficiency of the eUPFRA.
AB - Over the decades, the constant life diagram has become an important tool for engineering design and assessment. For specific materials, the effect of mean stress and stress amplitude on the fatigue life is considered in traditional constant life diagrams. In this study, the concept of the structural constant creep-fatigue life diagram is proposed for engineering structures subjected to cyclic loads in high-temperature environments. By integrating constant fatigue and creep-fatigue life curves into the traditional Bree diagram, we offer an efficient and reliable approach that enables quick determination of structural life and corresponding failure mechanisms. To provide a one-stop solution for the evaluation of constant fatigue/creep-fatigue life curves, an extended Unified Procedure for Fatigue and Ratchet Analysis (eUPFRA) has been proposed based on the Linear Matching Method (LMM) framework. Case studies on engineering components have also been performed with consideration of the cyclic hardening effect, temperature-dependent material properties and various damage models. The impact of the target life and creep dwell time is further investigated, as well as the creep-fatigue interaction mechanism. Verification against ABAQUS step-by-step inelastic analysis has finally been conducted, confirming the precision and efficiency of the eUPFRA.
KW - Constant life diagram
KW - Creep
KW - Direct methods
KW - Finite element analysis
KW - Low cycle fatigue
UR - http://www.scopus.com/inward/record.url?scp=85190259680&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2024.118005
DO - 10.1016/j.engstruct.2024.118005
M3 - Article
AN - SCOPUS:85190259680
VL - 308
JO - Engineering structures
JF - Engineering structures
SN - 0141-0296
M1 - 118005
ER -