Engineering Board Exam Reviewer · Strength of Materials · medium
Toughness of a material, as measured from its stress-strain diagram, corresponds to:
- The slope of the elastic portion of the curve
- The stress at the yield point
- The total area under the stress-strain curve up to fracture
- The area under the elastic portion only
Answer
C. The total area under the stress-strain curve up to fracture
Solution
Toughness is the energy per unit volume absorbed up to fracture, represented by the entire area under the stress-strain curve; the elastic area alone is the modulus of resilience.
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