PHASE 4 - FORCE ANALYSIS (PART 1)

DESIGN ANALYSIS

1. To calculate F1,F2 & H2

Estimated weight of car = 5 ton (P allowable)

Safety factor = 2

Maximum weight = 10 ton (2 x 5 ton)

P allowable = 5 ton

d1 = 25mm = 0.025m

h1 = 10cm = 0.1m

2. To calculate Torque,Nm

F2 = 78.4 KN

Power screw:

         Mean diameter, dm  = 10mm and below

         P, Thickness of thread = 1.5mm

         F, coefficient of friction = 0.15

         (Hard steel on cast iron)

Assumptions:

No of teeths, T driven = 28

Diameter driven = 4.74 inch = 0.12m ; r2 = 0.06m

No of teeths, T driver = 14

Diameter driver = 2.49 inch = 0.063m ; r3 = 0.0315m

•             Motor chosen, T = 200 Nm
•             The motor chosen is right

3. To calculate thickness of tank and jack

Chosen material:

Stainless steel type 304

Yield strength, σ = 215 Mpa

Jack outer diameter = 25mm + (11mm x 2)

                                  = 47mm             

Tank outer diameter = 20mm + (9.3mm x 2)

                                 =38.6mm

                    

P = Pressure

σ = Yield Strength

r = radius

t = thickness

MORE CALCULATION SOONER !!