SECTION MODULUS AND OPTIMIZATION
AIM:
Using the Section from Hood design and calculating the section modulus using the formula S = I/y
S = Section Modulus
I = Moment of Inertia
Y = distance between the nuteral axis and the extreme end of the object
Coming up with a new section that has improved the section modulus of the previous section and mentioning what changes can make that has increased the strength.
DESCRIPTION:
Section modulus is a geomentrical property of a cross-section used for desining structural beams and flexural members. The section modulus (S) is a single parameter that measures the strength cross-sectional in bending. Yield moment (My) is the moment at which entire cross-section has reached its yield stress. Using these calculation values we are able to determine the moment capable of being handled by hood before deformation.
FORMULAE:
S = I/Y
S = Section Modulus (mm^3).
I = Moment of Inertia (mm^4).
Y = distance between the nuteral axis and the extreme end of the object (mm).
My = S*σ (Yield)
My = Yield moment(N-mm)
σ = Yield strength (N/mm^2)
MATERIAL DATA:
Stainless steel AISI 302 – cold-rolled – y = 520 MPa
SOFTWARE USED: CATIA V5.
HOOD DESIGN:
CALCULATIONS:
In this considered my hood design for section modulus and calculated the results for inner & outer panel which is offsetted at 2mm.
Here,
- S1 = I/Y
I(min) = 1.3*10^12
Y= 240.671
S1 = 1.3*10^12 / 240.671
S1= 5.401 mm^3
My = S* σ
S1 = 5.401 mm^3
σ = 520 N/mm^2
My1 = 2.808 Nmm.
In this considered my hood design for section modulus and changed inner & outer panel which is offsetted at 5mm to achive results.
Here.
2. S2 = I/Y
I(min) = 1.85*10^12
Y= 240.671
S2 = 1.85*10^12 / 240.671
S2= 7.686 mm^3
My = S* σ
S2 = 7.686 mm^3
σ = 520 N/mm^2
My2 = 3.997 Nmm.
CONCLUSION:
From the calculated results S1 & S2 are the section modulus for my hood design. In this section modulus "S2' value is higher when compared to 'S1'. Thus, it results in 'S2' can sustain the deformation and has higher strength.