A bar is subjected to a combination of a steady load of 60 kN and a load fluctuating between -10 kN and 90 kN. The corrected endurance limit of the bar is 150 MPa, the yield strength of the material is 480 MPa and the ultimate strength of the material is 600 MPa. The bar cross-section is square with side $a$. If the factor of safety is 2, the value of $a$ (in mm), according to the modified Goodman’s criterion, is ________ (correct to two decimal places).
The principle stresses at a point in a critical section of a machine component are ${\sigma}_{1}$=60 MPa, ${\sigma}_{2}$=5 MPa and ${\sigma}_{3}$=-40 MPa. For the material of the component, the tensile yield strength is ${\sigma}_{\mathrm{y}}$=200 MPa. According to the maximum shear theory, the factor of safety is
The stress-strain curve for mild steel is shown in the figure given below. Choose the correct option referring to both figure and table.
A bar is subjected to fluctuating tensile load from 20 kN to 100 kN. The material has yield strength of 240 MPa and endurance limit in reversed bending is 160 MPa. According to the Soderberg principle, the area of cross-section in mm^{2} of the bar for a factor of safety of 2 is
Match the following criteria of material failure, under biaxial stresses ${\sigma}_{1}$ and ${\sigma}_{2}$ and yield stress ${\sigma}_{\mathrm{y}}$, with their corresponding graphic representations :
A forged steel link with uniform diameter of 30 mm at the centre is subjected to an axial force that varies from 40 kN in compression to 160 kN in tension. The tensile (S_{u}), yield (S_{y}) and corrected endurance (S_{e}) strengths of the steel material are 600 MPa, 420 MPa and 240 MPa respectively. The factor of safety against fatigue endurance as per Soderberg’s criterion is
The piston rod of diameter 20 mm and length 700 mm in a hydraulic cylinder is subjected to a compressive force of 10 kN due to the internal pressure. The end conditions for the rod may be assumed as guided at the piston end and hinged at the other end. The Young’s modulus is 200 GPa. The factor of safety for the piston rod is