A wood specimen right was falled in bending Please explain t

A wood specimen (right) was falled in bending. Please explain the reason for the failure shape in the cross-section of the specimen.

Solution

bending is applied to those material which have some ductility so that a little bit of deflection can takes place while wood is one ofthe most brittle material and when failure occurs in wooden beam if load has been applied from above, ssection below n.a is in tension while above N,a is in compression and to balance thier stress above and below N.A material get fractured near to location of load opposite to each other above and below N.A