City Guilds Model Questions Vol1 2018 Engineering Question 34
Practice objective / multiple choice question 34 from the 2018 City Guilds Model Questions Vol1 Engineering examination.
A solid circular steel rod is subjected simultaneously to an axial tensile load of \(30\ \text{kN}\) and a bending moment of \(12\ \text{kN·m}\). The steel has a yield strength of \(250\ \text{MPa}\). Using the von Mises criterion \(\sigma_{v}=\sqrt{\sigma_{a}^{2}+3\sigma_{b}^{2}}\) (where \(\sigma_{a}=P/A\) and \(\sigma_{b}=Mc/I\)), determine the minimum diameter of the rod (in millimetres) so that \(\sigma_{v}\) does not exceed the yield strength. For a solid circular section, \(A=\pi d^{2}/4\) and \(I=\pi d^{4}/64\).
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About This Question
This is City Guilds Model Questions Vol1 2018 Engineering Question 34. It is one of the objective questions from the 2018 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Medium .
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