efine the terms shear stress and shear strain, illustrating your answer by means of a simple sketch. Two circular bars, one of brass and the other of steel, are to be loaded by a shear load of 30 kN. Determine the necessary diameter of the bars (a) in single shear, (b) in double shear, if the shear stress in'the two materials must not exceed 50 MN/m 2 and 100 MN/m z respectively. [27.6, 19.5, 19.5, 13.8 ram.]   Can you please show a full solution explaining what *  means if you are using it   thanks

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