Section Modulus calculation and optimization

1. Intention of a section modulus

To optimize the existing section modulus into improved strenght of section modulus, it is required a design change on the hood panel.

Introduction

The significance of the calculation is to understand section modulus of the hood design and analyze its effect on Body in white structures by optimizing it in different conditions.

The design which is efficient to increase the load whithstanding capability by optimizing the shape of the section.

2. Optimization and calculations

case 1

Y = 892/2 =446 mm

S = I/Y

There by,

Smax = max. section modulus (mm^3)

Smin = min. section modulus (mm^3)

Imax = max.moment of Inertia (mm^4) - 4.893 e6

Imin = min.moment of Inertia (mm^4) - 1.595 e4

Y = distance from the centre axis to the extrem end of the object. (446 mm)

Smax = 4.893 * 10^6 / 446 = 10970.8 mm^3

Smin = 1.595 * 10^4 /446 = 35.7 mm^3

Case - 2

To develop the strenght of the panel, a curve offset has been done.

Imax = max.moment of Inertia (mm^4) - 4.925 e6

Imin = min.moment of Inertia (mm^4) - 1.749 e4

Y = distance from the centre axis to the extrem end of the object. (446 mm)

Smax = 4.925 * 10^6 / 446 = 11042.6 mm^3

Smin = 1.749 * 10^4 /446 = 39.2 mm^3

conclusion

By comapring these case 1 and 2 section modulus, case 2 obtained a good strenght of section modulus. Thereby concluding these calculation to have an improved SM needs to increase the strenght by offsetting the face or section curve.