GB/T 43103-2023Metallic materials—Methods for creep-fatigue damage assessment and life prediction (English PDF)
金属材料 蠕变-疲劳损伤评定与寿命预测方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 7, 2023
Implementation date
April 1, 2024
Scope
GB/T 43103-2023 is the English-translated version of 金属材料 蠕变-疲劳损伤评定与寿命预测方法.
This document specifies the principles and the basic tests of the methods for assessing creep-fatigue damage in metallic materials and predicting their life, the basic steps for constructing the creep-fatigue damage assessment diagram, and the procedure for assessing creep-fatigue damage and predicting the life of a high-temperature structure.
The document applies to metallic materials free of macroscopic defects subjected to creep-fatigue loading in air, and to the critical regions of high-temperature structures where the risk of crack initiation is high.
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Document preview — GB/T 43103-2023
National Standard of the People's Republic of China
- ICS
- 77.040.10
- Classification
- H 22
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- PrefaceI
- Introduction
- 1 Scope
- 2 Normative reference documents
- 3 Terms and Definitions
- 4 Symbols and descriptions
- 5 Principle
- 6 Basic Test
- 6.1 Test requirements
- 6.2 Material property data
- 7 Basic Steps 5 of Creep-Fatigue Damage Assessment Chart
- 7.1 Creep-fatigue damage scatter
- 7.2 Damage criterion critical line
- 7.3 Creep-fatigue damage assessment Figure
- 8 High Temperature Structural Creep-Fatigue Damage Assessment and Life Prediction Procedure
- 8.1 Basic stress analysis
- 8.2 Steady-state stress-strain analysis
- 8.3 Data processing
- 8.4 High temperature structural creep-fatigue damage assessment
- 8.5 High temperature structural creep-fatigue life prediction
- Appendix A (informative) Strain energy density dissipation creep-fatigue life prediction model parameter fitting method
- Appendix B (informative) Derivation of creep damage formula
- Appendix C (Informative) Inelastic Analysis
- Appendix D (informative) High-temperature structural creep-fatigue damage assessment and life prediction program application case
- Reference
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
Introduction
In fields such as aviation, energy and electric power, the working environment of high-temperature equipment is becoming increasingly complex. Among them, key hot-end life-limiting components are not only subjected to stable In addition to the constant load of state operation, it usually also bears the alternating load caused by the start and stop of the device and temperature fluctuations. Its service process is accompanied by severe Heavy creep-fatigue loading interaction. Research shows that the life of metal materials under creep-fatigue interaction is much lower than that of single fatigue or Or the material life under creep mechanism. Traditional damage assessment and life prediction methods based on a single mechanism cannot accurately predict creep-fatigue load.
Failure cycles of materials under load and service life of components. Therefore, establishing creep-fatigue damage assessment and life prediction methods is an important step to determine the creep-fatigue damage assessment and life prediction methods.
The key to the service life of high-temperature equipment under variable fatigue load is of great significance to ensuring the life reliability of high-temperature equipment.
1 Scope
This document specifies the principles and basic tests related to creep-fatigue damage assessment and life prediction methods of metallic materials, creep-fatigue damage Basic steps for damage assessment diagrams, high-temperature structural creep-fatigue damage assessment and life prediction procedures.
This document is applicable to metal materials without macroscopic defects that are subject to creep-fatigue loads in atmospheric environments and materials with high risk of crack initiation. Temperature structure critical region.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.
GB/T 2039 Uniaxial tensile creep test method for metallic materials
GB/T 15248 Axial constant amplitude low cycle fatigue test method for metallic materials
GB/T 38822 Creep-fatigue test method for metallic materials
3 Terms and definitions
The terms and definitions defined in GB/T 38822 and the following apply to this document.
3.1 Cycle number of cycle
During the loading process, the test control variable strain is the smallest waveform unit that cannot be split repeatedly and changes with the test time.
Note: See Figure 1a).
3.2 Stress relaxation
At a certain temperature, the stress response gradually decreases with time during the loading strain maintenance period.
Note: See Figure 1b).
3.3 Hysteresis loop
Stress-strain response curve within one cycle.
Note: See Figure 1c).
3.4 Half-lifecycle
Half of the material failure cycle.
Note: For most metal materials, the half-life cycle is a representative cycle of stable cycles.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 23 pages — is available in the English PDF.
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Related Standards
GB/T 15248-2008 — The test method for axial loading constant-amplitude low-cycle fatigue of metallic materials
GB/T 2039-2024 — Metallic materials - Uniaxial creep testing method in tension
GB/T 20390.1-2018 — Textiles -- Assessment of the ignitability of bedding items -- Part 1: Ignition source: smouldering cigarette
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