LUGGAGE TROLLEY DESIGN CALCULATIONGroup membersMUHAMMAD ZA’IMUDDIN AMIRUL HAKIMIKHWAN HADI

MOHD SHAHRINMOHAMAD HAFIZANMOHAMAD HAFIZAN

Stainless steel X10Cr13

Density,ρ = 7700

Material chosen

Major plate◦ Length, l = 0.4m◦ Width, w = 0.02m◦ Thickness, t = 0.005m◦ Volume, v = l × w × t

= 0.4m × 0.02m × 0.01m =

◦ Mass, m = v × ρ = )( 7700 )

= 0.616 kg◦ Total mass of two component = 2(0.616 kg)

= 1.232 kg

Base Component

Minor plate◦ Length, l = 0.3m◦ Width, w = 0.02m◦ Thickness, t = 0.01m◦ Volume, v = l × w × t

= 0.3m × 0.02m × 0.01m =◦ Mass, m = v × ρ

= ( )( 7700 ) = 0. 462 kg Total mass of two component = 2(0.462 kg) = 0.924 kg

Major pivot joint◦ Length, l = 0.73m◦ Width, w = 0.01m◦ Thickness, t = 0.005m◦ Volume, v = l × w × t

= 0.73m × 0.01m × 0.005m =

◦ Mass, m = v × ρ =( )( 7700 ) = 0.281 kg

◦ Total mass of two component = 2(0.281 kg) = 0.562 kg

Minor pivot joint◦ Length, l = 0.38m◦ Width, w = 0.01m◦ Thickness, t = 0.005m◦ Volume, v = l × w × t

= 0.38m × 0.01m × 0.005m =

◦ Mass, m = v × ρ = )( 7700 ) = 0.146 kg

◦ Total mass of two component = 2(0.146 kg) = 0.292 kg

For ,◦ Volume, v = Π( - )0.24 m

=◦ Mass, m = v × ρ

= ( )2700 =0.293 kg For ,

◦ Volume, v = Π( - )0.24 m =

◦ Mass, m = v × ρ = ( )2700 = 0.283 kg Total mass base component = 0.283 kg + 0.293 kg + 0.292 kg

0.562 kg + 0.924 kg + 1.232 kg = 3.586 kg

Handle Component H-component

◦ Volume, v = Π( - )0.4 m =

◦ Mass, m = v × ρ = ( )2700 = 0.4877 kg

◦ Total mass of two component = 2(0.487kg) = 0.974 kg

For ,◦ Volume, v = Π( - )0.24 m

=◦ Mass, m = v × ρ

= ( )2700 =0.293 kg For ,

◦ Volume, v = Π( - )0.24 m =

◦ Mass, m = v × ρ = ( )2700 = 0.283 kg Total mass of H-component = 0.283 kg + 0.293 kg + 0.974 kg = 1.55 kg

Volume, v = Π( - )0.45 m = Mass, m = v × ρ = ( )2700 = 0.535 kg Total mass of two component = 2(0.535kg) = 1.071 kg

Total mass of handle component = 1.071 kg + 1.55 kg

= 2.62 kg

Total mass overall component = 2.62 kg + 3.586 kg

= 6.206 kg

Estimate The Center Of The Gravity For The Trolley

In the calculation section, the first step to do is to find the chassis centre of gravity- CG.

The trolley CG will be determined from calculate reaction forces from the rear tyre.

Estimate the CG

Calculation

CG = 0.3906m

FREE BODY DIAGRAM OF THE TROLLEY

Reaction Force

Shear And Moment Diagram

Maximum moment = 104.31 Nm

Maximum Stress

Factor of Safety

The deflection at the base of the trolley were determine by using the finite element.

Design deflection

E=20,000MPa KQ=F

the deflection of the trolley

During the fabrication process some minor change had been done on the design that been calculated cause of

a) Lack of equipmentb) Hard to fabricatec) un stabile design

Fabrication proces

Fabrication process

Trolley Handle

Trolley tyre

Trolley body

Expand and compressed system at the trolley body

Milling process at the trolley body

Welding process at several joint

Unfinished yet trolley

That’s all folks

Q & A