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Updated: Nov 18, 2025
04:15
A Mouse Model of Fatigue Induced by Peripheral Irradiation
Published on: March 17, 2017
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Fatigue Reliability Analysis Method of Reactor Structure Considering Cumulative Effect of Irradiation
Bo Sun1, Junlin Pan1, Zili Wang1
1School of Reliability and Systems Engineering, Beihang University, No.37 XueYuan RD. Haidian, Beijing 100191, China.
Materials (Basel, Switzerland)
|February 11, 2021
Summary
Irradiation significantly impacts reactor structure fatigue life, reducing it by 24.3% due to hardening and embrittlement. A new model accurately predicts fatigue reliability considering neutron dose effects.
Area of Science:
- Nuclear Engineering
- Materials Science
- Reliability Engineering
Background:
- Reactor structures face fatigue under irradiation conditions.
- Irradiation hardening and embrittlement alter material properties.
Purpose of the Study:
- Quantify irradiation effects on fatigue performance.
- Develop a fatigue life prediction model incorporating neutron dose.
- Perform reliability analysis for reactor structures.
Main Methods:
- Developed a fatigue life prediction model considering cumulative neutron dose.
- Applied Miner's linear cumulative damage law for total fatigue damage.
- Utilized Monte Carlo simulation for reliability analysis.
Main Results:
- Fatigue life reduced by 24.3% when considering irradiation effects.
- Irradiation increased fatigue life at low strains and decreased it at high strains.
- Fatigue strength coefficient and elastic modulus greatly influenced reliability.
Conclusions:
- A fatigue reliability analysis accounting for irradiation is more accurate than current methods using high safety factors.
- The developed model provides improved reliability analysis and life prediction for reactor structures.
- Understanding irradiation's cumulative effect is crucial for nuclear structure integrity.
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