Engineering English
Stress Intensity Factor
Materials Engineering · Mechanical Engineering · Aerospace Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: A fracture mechanics parameter that characterizes the stress field near the tip of a crack. It determines the load required to propagate a crack in a material.
Example in context
“The engineer calculated the stress intensity factor to assess whether the detected crack would propagate under service loads.”
“Mühendis, tespit edilen çatlağın servis yükleri altında ilerleyip ilerlemeyeceğini değerlendirmek için gerilim yoğunluğu faktörünü hesapladı.”
Where engineers use it
Used in fracture mechanics analysis to compare crack tip conditions against material toughness. Engineers apply it for damage tolerance assessment of aircraft structures and pressure vessels.
Synonyms: K, stress intensity parameter
In Mechanical Engineering
A parameter used in fracture mechanics to characterize the stress field near a sharp crack tip. It determines the crack growth behavior under applied load.
“The stress intensity factor for a center-cracked panel under tension can be calculated using the formula K_I = σ√(πa).”
In Aerospace Engineering
A parameter describing the magnitude of the elastic stress field surrounding a crack tip, dependent on remote stress, crack length, and geometry. Comparing it with fracture toughness determines whether the crack will grow unstably.
“The stress intensity factor at the corner crack was computed for each spectrum load case and compared against the material fracture toughness.”
Practice: can you use “Stress Intensity Factor” at work?
A senior engineer asks you to evaluate a crack found in a welded bridge girder during inspection. You must calculate and interpret the stress intensity factor.
Show a model answer
“We must ensure the stress intensity factor stays below the critical value.”
“Stress Intensity Factor” in 21 languages
| English | Stress Intensity Factor |
|---|---|
| Turkish | gerilim yoğunluğu faktörü |
| French | facteur d'intensité de contrainte |
| German | Spannungsintensitätsfaktor |
| Spanish | factor de intensidad de tensión |
| Chinese | 应力强度因子 |
| Arabic | عامل شدة الإجهاد |
| Portuguese | fator de intensidade de tensão |
| Russian | коэффициент интенсивности напряжения |
| Japanese | 応力拡大係数 |
| Italian | fattore di intensità di sollecitazione |
| Vietnamese | hệ số cường độ ứng suất |
| Hindi | प्रतिबल तीव्रता कारक |
| Thai | ปัจจัยความเข้มของความเค้น |
| Indonesian | faktor intensitas tegangan |
| Korean | 응력 확대 계수 |
| Bengali | স্ট্রেস ইন্টেনসিটি ফ্যাক্টর |
| Dutch | spanningsintensiteitsfactor |
| Swedish | spänningsintensitetsfaktor |
| Finnish | jännitysintensiteettikerroin |
| Ukrainian | коефіцієнт інтенсивності напруги |
Frequently asked questions
What does Stress Intensity Factor mean in engineering?
A fracture mechanics parameter that characterizes the stress field near the tip of a crack. It determines the load required to propagate a crack in a material. In Materials Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Stress Intensity Factor?
Stress Intensity Factor is pronounced /stɹɛs ɪnˈtɛnsəti ˈfæktəɹ/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Stress Intensity Factor used in a sentence?
Example from an engineering context: “The engineer calculated the stress intensity factor to assess whether the detected crack would propagate under service loads.”
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