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A material has tensile strength 210 MPa, yield strength 117 MPa and fracture strain 0.45. What will be approximate value of toughness?

A material has tensile strength 210 MPa, yield strength 117 MPa and fracture strain 0.45. What will be approximate value of toughness? Correct Answer 73.6 MJ/m3

Toughness of material may be given as- UT ≈ ((σu + σy) εf)/2 ≈((210 + 117) 0.45)/2 ≈ 73.6 MJ/m3 Here, σu = tensile stress, σy = yield stress, εf = fracture strain.

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