A prismatic bar of 25 mm diameter and 2 m long is subjected to 60 KN a...
Calculation of Strain Energy and Resilience in a Prismatic Bar
Given Data:
- Diameter of the bar = 25 mm
- Length of the bar = 2 m
- Applied axial tensile load = 60 KN
- Young's modulus of elasticity of bar material = 200 GPa
Calculation of Area of Cross-section:
Area of cross-section of the bar can be calculated using the formula:
Area = π/4 * d2
Where,
- π = 3.14
- d = Diameter of the bar = 25 mm = 0.025 m
Putting the values in the formula, we get:
Area = 3.14/4 * (0.025)2 = 0.00049 m2
Calculation of Stress:
Stress can be calculated using the formula:
Stress = Applied load / Area of cross-section
Putting the values in the formula, we get:
Stress = 60,000 N / 0.00049 m2 = 122448.98 N/m2
Calculation of Strain:
Strain can be calculated using the formula:
Strain = Stress / Young's modulus of elasticity
Putting the values in the formula, we get:
Strain = 122448.98 N/m2 / 200,000,000,000 N/m2 = 0.000000622
Calculation of Strain Energy:
Strain energy can be calculated using the formula:
Strain energy = (1/2) * Stress * Strain * Volume
Where,
- Volume = Area of cross-section * Length of the bar
Putting the values in the formula, we get:
Volume = 0.00049 m2 * 2 m = 0.00098 m3
Strain energy = (1/2) * 122448.98 N/m2 * 0.000000622 * 0.00098 m3 = 0.00003795 J
Calculation of Resilience:
Resilience can be calculated using the formula:
Resilience = (1/2) * Stress * Strain
Putting the values in the formula, we get: