Fracture Toughness - Askmemetallurgy

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GATE MT 2020 Q16. A component subjected to tensile stress in a mechanical device is monitored periodically for cracks by NDT. The NDT technique can only detect cracks (both surface and internal) which are larger than 1 mm. Keeping a 10 % margin of safety, the maximum allowed tensile stress on the component will be ______MPa. (Round off to the nearest integer). Given, fracture toughness K(Ic) =30MPa m(1/2) and assume crack geometry factor of unity.

73.08%(A) crack opening mode ( 19 voters )

3.85%(B) forward shear mode ( 1 voter )

0%(C) parallel shear mode ( 0 voters )

23.08%(D) perpendicular shear mode ( 6 voters )

Based On 26 Votes