Section Modulus calculation and optimization

SECTION MODULES

section modules used to measure the strength of section areas

when strength is higher , the load capability is greater

symbol of section modules is - S

formula for calculating section modules,

S = I/Y

where , I - moment on inertia

Y - distance from the extreme end of an object

PROCEDURE:

making datum plane on the mid of outer plane

making intersection curve by using datum plane

hide all the bodys

sketch on the datum plane and project the intersection curve

hide the intersection curve

make line , thats connect to outer line of both inner panel and outer panel

revome the extra porsions , and make fully closed sketch

by using section inertia measuring inertia

taking the minimum amount of inertia

draw 2 vertical line on the ends of sketch

measure the the length between 2 lines and takes the half

CASE 1 :

moment of inertia (I) = 1.41054*10^4*mm^4 (minimum)

length of object (Y) = 882.9 / 2

= 441.45 mm

S = I/Y

S = 1.41054*10^4 / 441.45

= 31.95 mm^3

CASE 2 :

increasing the depth of inner panel by 0.5mm:

moment of inertia (I) = 1.42747*10^4*mm^4 (minimum)

length of object (Y) = 882.9 / 2

= 441.45 mm

S = I/Y

S = 1.42747*10^4 / 441.45

= 32.33 mm^3

conclusion :

the difference only can be seen in the moment of inertia , then aslo section modules can be chabge in the design