Question

A semi-infinite plate with a transverse elliptical hole having half-width of ellipse perpendicular to the direction of load, and half-width in direction of load is 2 and 1 mm respectively. The stress concentration factor at edge of ellipse will be_______.

• A. 5

Answer 1

The correct option is A 5

a = Half width of ellipse perpendicular to the direction of load = 2 mm
b = Half width of ellipse parallel to the direction of load = 1 mm


$k_t=1+2\left(\frac{a}{b}\right)=1+2\times \left(\frac{2}{1}\right)=5$