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Analysis of chassis
Sakina Taher
201101229
Summary of forces
Mass(kg)
1
Weight(N)
Size
Height
(mm)
(mm)
150
Engine
Transmission
Radiator
210
50
2060.1
700
600
10
2
Battery
24
235.4
240
200
3
Wheels and tires
80
784.8/2=392.4
550
550
4
Chassis
45
441.5
3100
280
5
Passengers
140
1373.4
1530
600
6
Fuel tank
35
343.4
800
270
Total mass
534
5238.5
20% additional mass for seat, electrical
system
106.8
1047.7
Total mass+ 20% additional mass for seat,
electrical system
640.8
6286.2
Chassis +20% additional mass for seat,
electrical system
151.8
1489.2
Table 1 Summary od forces.
Tube properties
Size of the tubes used
25x25 mm
Thickness = 2 mm
20x20 mm
Thickness = 2 mm
Outer diameter =50
mm
Inner diameter = 46
Outer diameter =38 mm
s = 33 mm
Inner diameter
Mechanical properties of the tube (mild steel low carbonmm
AISI 1020)
Failure modes
Failure modes are the physial processes that has an effect or combined effects to
produce failure (defects in design, process, quality, or part application). Some of theses
failures will be discussed in this section.
Fracture
Separation of a body into pieces due to stress, at temperatures below the melting point.
First crack forms and then it propagates in the body, depends on the ability of the
material to undergo plastic deformation before the fracture (Failure, 2014).
Ductile fracture:


Extensive plastic deformation before cracking
The crack is stable and it can resist more extension if the applied stress is not
increased.
Brittle fracture:


Little plastic deformation
The crack is not stable and it propagates rapidly
Ductile material: extensive plastic deformation and energy absorption before fracture.
Brittle material: little plastic deformation and low energy absorption before fracture
(Failure, 2014).
Figure 1 Brittle Vs Ductile