Elastic Section Modulus

The elastic section modulus is defined as s i y where i is the second moment of area or area moment of inertia not to be confused with moment of inertia and y is the distance from the neutral axis to any given fibre.

Elastic section modulus. Ze is the elastic section modulus. For symmetrical sections such as those shown in figures 1 48a and 1 48b. If the failure is considered till the elastic zone then we consider elastic modulus.

1 10 s x ix h 2 for the circular shapes sx ix r figures 1 48c and 1 48d. Resisting moment my fy x zy. And so here s our elastic flexural formula.

We put it in terms of our section modulus. But that s what we re going to use as we go forward and do actual design problems. It is often reported using y c where c is the distance from the neutral axis to the most extreme fibre as seen in the table below.

For general design the elastic section modulus is used applying up to the yield point for most metals and other common materials. Z elastic section modulus z c min s 1 5z for slender sections square and rectangular hollow sections clause 5 2 5 defines. And most of these resources for finding section moduli for different cross sections are free to the public and you can find them online.

Elastic section modulus. The elastic section modulus is defined as s i y where i is the second moment of area or moment of inertia and y is the distance from the neutral axis to any given fiber. Elastic modulus is the steel modulus based on the stress strain curve before yielding.