Question

A circular specimen of MgO is loaded using a three-point bending mode. Compute the minimum possible radius of the specimen without fracture, given that the applied load is 750 N (169 lbf), the flexural strength is 105 MPa (15,000 psi), and the separation between load points is 75.0 mm (2.95 in.).

Answer 1

The answer is
`4.7*10^(-3) m`

Step-by-step explanation:

The equation for maximum ratio is given

`r max = \sqrt[3]{(F*L)/(ro*pi) } = \sqrt[3]{(750 (45*10^(-3)))/((105 * 10^(6))*pi ) }`

rmax =
`4.7*10^(-3) m`