Section Modulus calculation and optimization

Section Modulus

Section Modulus is the geometric property of the given cross-section of any shaft or beam structures. It is the direct measure of the strength of the shaft,beam or any other section.

• Ratio of total moment resisted by the section to the stress in the extreme fibre.
• It gives us an idea about how much of the load the given structure can take.

SECTION MODULUS, S= I/Y

I=Moment of inertia

M=Distance between the neutral axis and the extreme end of the object.

OBJECTIVE :-Come up with a new section that has improved the section modulus of the previous section and mention what change you made that has increased the strength.

MATERIAL

STAINLESS STEEL AISI 302 COLLED-ROLLED

YIELD STRENGTH= 502 Mpa

ACTUAL MASTER SECTION WITH 2 MM OFFSET

I max = 8.385x10^6 mm^4

Y= 489.3/2=244.65

S= I/Y= 34273 mm^3

BENDING MOMENT ,B = Sxσ=17205046 N mm

MODIFIED PART HAVING AN OFFSET OF 3 MM

I max= 8.398x10^6 mm^4

Y= 244.65

S=I/Y=34327 mm^3

B=Sxσ=17232154 N mm

CONLUSION

Higher the section modulus of a structure, the more the resistive it becomes to bending.If the gap increases section modulus also increases and hence its load bearing capacity.