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

Answer:

The answer is $4.7*10^{-3} m$

Explanation:

The equation for maximum ratio is given

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

rmax = $4.7*10^{-3} m$