section modulus

SECTION MODULUS

It is geometric property mostly used in design of beams or any other flexual members. It highly depends on the shape of the body. It is defined as the ratio of moment of inertia of section about its centroidal axis to the extreme layer of neutral axis.

Mathematically

S=I/Y

S= section modulus

I=moment of inertia

Y=distance between the neutral axis and the extreme end of the object.

From the above formula, it is clear that section modulus is directly proportional to the moment of inertia. Thus to make more moment of inertia we should change the drawing depth for more strength and for more section modulus.

Existing hood section

modified hood section