learn.howToCalculate
learn.whatIsHeading
Thermal stress develops when temperature changes constrain material expansion. Critical in composite structures and multi-material assemblies.
الصيغة
Calculate: σ_th = E × α × ΔT where α is expansion coefficient
- E
- E value — Variable used in the calculation
دليل خطوة بخطوة
- 1Calculate: σ_th = E × α × ΔT where α is expansion coefficient
- 2If constrained (cannot expand freely), stress develops
- 3Account for different materials with different expansions
أمثلة محلولة
الإدخال
Steel bar L=1m, ΔT=50K, α=12×10⁻⁶, E=200GPa, fully constrained
النتيجة
σ ≈ 120 MPa tensile stress
Significant stress
أخطاء شائعة يجب تجنبها
- ✕Neglecting thermal stress in composite structures
- ✕Assuming small temperature changes are negligible
أسئلة شائعة
Why do bridges have expansion joints?
To allow free expansion/contraction from temperature; otherwise excessive stress develops.
How do mismatched material expansions cause problems?
Different αbetween materials creates internal stress at interfaces that can cause cracking.
هل أنت مستعد للحساب؟ جرب الآلة الحاسبة Thermal Stress المجانية
جربه بنفسك →