Home › GATE CE › Civil Engineering › Strength of Materials › Hooke's law (linear elastic regime): : 
ANo relation
BAlways
CStress alone
Dσ = Eε (stress proportional to strain)
Answer & Solution
Correct answer: D. σ = Eε (stress proportional to strain)
Within elastic limit (proportional limit), stress and strain are linearly related: σ = Eε, where E = Young's modulus. Slope of initial linear portion of stress-strain diagram. For steel E ≈ 200 GPa. Beyond yield → plastic deformation.
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