Significance Of Section Modulus

This modulus is perhaps the single most important design parameter describing hull girder strength.

Significance of section modulus. The stress in the outermost section of beam is computed with the help of section modulus. Section modulus of any section is the ratio of the moment of inertia to the distance of extreem fibre from the neutral axis. This rule expressed in formula would be q i c where q section modulus.

A beam that has a larger section modulus than another will be stronger and capable of supporting greater loads. Section modulus is a geometric property for a given cross section used in the design of beams or flexural members. It includes the idea that most of the work in bending is being done by the extreme fibres of the beam ie the top and bottom fibres of the section.

Any relationship between these properties is highly dependent on the shape in question. 1 10 s x ix h 2 for the circular shapes sx ix r figures 1 48c and 1 48d. The section modulus or as it is sometimes called resisting inches of a section is equal to the moment of inertia divided by the greatest distance of the neutral axis from the outside fibers of the figure or section.

Section modulus it is termed as the ratio of second moment of area and distance from n a neutral axis to the extreme fiber. Equations for the section moduli of common shapes are given below. For symmetrical sections such as those shown in figures 1 48a and 1 48b.

It is a direct measure of the strength of the beam. The section modulus of the cross sectional shape is of significant importance in designing beams. Section modulus is a geometric property for a given cross section used in the design of beams or flexural members.

Other geometric properties used in design include area for tension and shear radius of gyration for compression and moment of inertia and polar moment of inertia for stiffness. The elastic section modulus sx is a single parameter that measures a cross section s strength in bending. Plastic section modulus is the section modulus when the cross section is.