Question

bending stress..what is the formula for flexural stress in a oval cross sectional beam?

Answer 1

if the moment of inertia for an ellipse is
\[I=\frac{ \pi }{ 4 } a b^{3}\]

and bending stress is
\[\sigma=\frac{ My }{ I }\]

and if it were a 3 point bend test, would my formula be
\[\sigma=\frac{ 2FL }{ \pi ab ^{2} }\]

F is the applied force and L is the distance between 2 supports. F is applied in the middle.