The property of a material or structure indicating the extent to which it can deform beyond the yield limit before failure or fracture is called:
Try it first: pick an option, then read the explanation.
Correct answer: B. ductility
Asked in SSC JE 14/11/2022
Detailed Explanation
After yielding, a material may stretch a great deal (mild steel) or break almost at once (cast iron, glass). The amount of plastic deformation it can take is the property asked for.
Why “ductility” Is Correct
That property is ductility, measured by percentage elongation or reduction in area in a tensile test, or by the ductility ratio (ultimate deformation / yield deformation) for a structure.
Why the Other Options Are Wrong
- A. failure load: Failure load is a load value, not a deformation property.
- C. yielding: Yielding is the onset of plastic deformation, not the capacity to deform beyond it.
- D. malleability: Malleability is the ability to be hammered or rolled into sheets under compression.
Key Point
Ductility = plastic deformation capacity beyond yield before fracture.
Key Concepts for Students
- Ductility ratio μ = Δu/Δy is important in earthquake design.
- Brittle materials fail with little warning.
- Malleability relates to compression; ductility to tension.
Practice more: this is question 3 in Principal Stress and Principal Planes MCQs – Part 1. Try the whole set and check every answer instantly.