Engineering English
Fatigue Life
Materials Engineering · Mechanical Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: The number of cycles of stress or strain that a material or component can withstand before failure under specified loading conditions.
Example in context
“The manufacturer conducted a series of tests to determine the fatigue life of the turbine blade under operating loads.”
“Üretici, türbin kanadının çalışma yükleri altındaki yorulma ömrünü belirlemek için bir dizi test gerçekleştirdi.”
Where engineers use it
Central concept in fatigue analysis; used to set maintenance intervals and design for infinite or finite life. Engineers predict fatigue life using S-N curves or strain-life methods.
Synonyms: fatigue lifetime, cyclic life, number of cycles to failure
In Mechanical Engineering
The number of load cycles a component can endure before a fatigue crack initiates and grows to failure under repeated or fluctuating stresses.
“Polishing the shaft surface and adding a larger fillet radius doubled the fatigue life predicted by the stress-life curve.”
Practice: can you use “Fatigue Life” at work?
You are tasked with evaluating a welded bracket that failed after 50,000 cycles. Determine the fatigue life under the actual loading spectrum and compare with the original design life.
Show a model answer
“The component's fatigue life must meet the design requirement of 10^6 cycles.”
“Fatigue Life” in 21 languages
| English | Fatigue Life |
|---|---|
| Turkish | yorulma ömrü |
| French | durée de vie en fatigue |
| German | Ermüdungslebensdauer |
| Spanish | vida a fatiga |
| Chinese | 疲劳寿命 |
| Arabic | عمر الكلال |
| Portuguese | vida em fadiga |
| Russian | усталостная долговечность |
| Japanese | 疲労寿命 |
| Italian | vita a fatica |
| Vietnamese | tuổi thọ mỏi |
| Hindi | थकान जीवन |
| Thai | อายุความล้า |
| Indonesian | umur lelah |
| Korean | 피로 수명 |
| Bengali | ক্লান্তি জীবন |
| Dutch | vermoeiingslevensduur |
| Swedish | utmattningslivslängd |
| Finnish | väsymisikä |
| Ukrainian | втомна довговічність |
Frequently asked questions
What does Fatigue Life mean in engineering?
The number of cycles of stress or strain that a material or component can withstand before failure under specified loading conditions. In Materials Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Fatigue Life?
Fatigue Life is pronounced /fəˈtiːɡ laɪf/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Fatigue Life used in a sentence?
Example from an engineering context: “The manufacturer conducted a series of tests to determine the fatigue life of the turbine blade under operating loads.”
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