Elongation of an Axially Loaded Bar
Mediumaxial deformationelasticity
A uniform linear-elastic bar has axial tensile load P = 100 kN, length L = 2 m, area A = 1,000 mm2, and modulus E = 200 GPa. What is its elongation?
- A0.1 mm
- B0.5 mm
- C1.0 mm
- D2.0 mm
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Answer: C. 1.0 mm
Use δ = PL/(AE) with consistent units: δ = (100,000 N)(2,000 mm)/[(1,000 mm²)(200,000 N/mm²)] = 1.0 mm.
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