Section Modulus calculation and optimization

SECTION MODULUS

Intro

section modulus is a geometric property for a given cross-section used in the design of beam and flexural members. by finding the section modulus we can find the resistance to remain unchanged when the force is applying to the object or substances.

S= I / Y

S - section modulus

I - the moment of inertia

y - the distance between the neutral axis and the end of the object.

Moment of inertia

here we are considering the area moment of inertia also known as the second moment of inertia. it is used in a sectional mechanical application, usually involving a section of any structure. the shape of the object and the plane of the section will give us the 2d part it is called the section.

when the area of the section increases the moment of inertia also increases. so the final result which is the section modulus also increases.

so we could say section modulus is proportional to the moment of inertia.

objective

to find a section modulus of the hood, and optimizing the section modulus value using NX_cad.

section modulus of the hood 1

calculation

S=I/Y, where I = 1.642814e4 mm4

y = 437.3843 mm

= 1.642814e4/437.3843

S =37.5599mm3 - this is the section modulus value for the hood section.

we have to consider the minimum value because from the point only the substance starts to change from its original shape.

optimized section modulus-2

calculation

S=I/Y

MOImin=1.755756e4mm4,y =437.3843mm

=1.755756e4/437.3843

S= 40.1421mm3

how optimization accomplished

#i have increased the distance between outer and inner panel by 2mm compared to the existing one. and also I have reduced the cutout area, so the the total sectional area increased.

difference =S =40.1421-37.5599 =2.5822mm3

RESULT

section modulus was successfully determined and improvised by increasing the section area.