DESIGN AND ANALYSIS ON SHOCK ABSORBER

1. Sr. No. Roll No. Name PRN NO.
1 58 Younis Giri 12010378
2 69 Aniruddha Thakur 12120191
3 72 Rameshwari Ramesh Ugale 12120241
4 75 Sagar Yadav 12120251
5 76 Dhiraj Zope 12120161
MECH-D: Batch 3 - Group 3
DESIGN AND ANALYSIS ON SHOCK ABSORBER
Guide – Prof. R.K.Bhagat
DOM-ME3262

2. Contents
● Cause of Failure
● Shock Absorber
Material
● Manufacturing Technique
● Introduction
& Objective
● Types Of Shock
Absorber ● Design of Spring
And other
Component
● Geometry
● Meshing
● Analysis
● Result

3. INTRODUCTION
❏ A shock absorber, also known as a
suspension damper, is an essential
component of a vehicle's suspension
system.
❏ Shock absorbers play a critical role in
ensuring a smooth and comfortable ride
for passengers, as well as improving
vehicle handling
❏ Shock Absorber come in various types
and designs depending on the specific
application and performance requirements.

4. OBJECTIVE
➔ To improve ride comfort and reduce vehicle vibrations and noise, resulting in
a smoother and quieter ride for passengers.
➔ To improve vehicle handling and stability by minimizing body roll, pitch,
and dive, thereby enhancing the vehicle's steering response and road holding
capabilities.
➔ To improve tire life and traction by maintaining consistent contact between
the tires and the road surface, which helps to ensure proper grip and reduces
the risk of skidding or hydroplaning.

5. "Design and Analysis of a Pneumatic Shock Absorber for a Bike" by R. Ravi and K. Suresh Babu
➔ This paper proposes the design and analysis of a pneumatic shock absorber for a bike. The design is optimized using
simulation software and experimental testing. The results show that the pneumatic shock absorber has better performance
compared to traditional hydraulic shock absorbers.
"Design and Analysis of a Twin Tube Shock Absorber for a Bike" by G. Lakshmi Narayana and K. Vinod Kumar
➔ This paper presents the design and analysis of a twin tube shock absorber for a bike. The shock absorber is modeled using
ANSYS software and optimized using Taguchi method. The results show that the twin tube shock absorber has better
performance in terms of damping and stiffness compared to a conventional mono-tube shock absorber.
"Design and Analysis of an Electromagnetic Shock Absorber for a Bike" by A. Karthick, R. Arun and M.
Arulselvan
➔ This paper proposes the design and analysis of an electromagnetic shock absorber for a bike. The shock absorber is designed
using simulation software and optimized using Taguchi method. The results show that the electromagnetic shock absorber has
better performance compared to traditional hydraulic shock absorbers.
LITERATURE REVIEW

6. "Design and Analysis of a Composite Shock Absorber for a Bike" by M. Ravi Shankar and B. Vijaya Ramnath”
➔ This paper presents the design and analysis of a composite shock absorber for a bike. The shock absorber is made of a
composite material and optimized using simulation software. The results show that the composite shock absorber has better
performance in terms of weight, stiffness, and damping compared to traditional shock absorbers.
"Design and Analysis of a Hydraulic Shock Absorber with Variable Damping for a Bike" by S. Ganesh and K.
Suresh Babu”
➔ This paper proposes the design and analysis of a hydraulic shock absorber with variable damping for a bike. The shock
absorber is modeled using ANSYS software and optimized using Taguchi method. The results show that the hydraulic
shock absorber with variable damping has better performance compared to traditional hydraulic shock absorbers.
"Design and Analysis of an Electromagnetic Shock Absorber for a Bike" by A. Karthick, R. Arun and M.
Arulselvan”
➔ This paper proposes the design and analysis of an electromagnetic shock absorber for a bike. The shock absorber is
designed using simulation software and optimized using Taguchi method. The results show that the electromagnetic shock
absorber has better performance compared to traditional hydraulic shock absorbers.

7. MATERIALS USED IN SHOCK ABSORBER
Copper
alloy
Spring
steel
Titanium
alloy
Structure
steel
➔ Excellent thermal and
electrical conductivity,
high strength and
corrosion resistance.
➔ Copper alloy shock
absorbers are commonly
used in high-
performance and racing
bikes due to their ability
to dissipate heat quickly,
➔ High-carbon steel alloy
known for its elasticity
and strength.
➔ It is commonly used in
shock absorbers due to its
ability to withstand high
stresses and provide high
levels of damping.
➔ High-strength carbon steel
alloy that is commonly used
in construction and
engineering applications.
➔ It is often used in shock
absorbers due to its high
strength and ability to
withstand large amounts of
stress.
➔ High strength-to-weight
ratio, excellent corrosion
resistance, and
biocompatibility.
➔ They are commonly
used in shock absorbers
for high-performance
and racing bikes due to
their ability to provide
high levels of damping
while being lightweight.

8. MANUFACTURING TECHNIQUES
1. Casting: This manufacturing technique involves pouring molten metal into a mold to create the desired shape
of the shock absorber.
1. Forging: This technique involves shaping metal by hammering or pressing it under high pressure. It can be
used to create shock absorber components such as piston rods and cylinders.
1. Welding: Welding is used to join two or more pieces of metal together to create the shock absorber
components. Common welding techniques include MIG welding and TIG welding.
1. Machining: Machining involves cutting and shaping metal using machine tools such as lathes, mills, and drills.
It can be used to create components such as valve bodies and brackets.
1. Powder metallurgy: This technique involves compacting metal powders into a desired shape and then
sintering them under high temperature and pressure to create a solid metal part. It can be used to create complex
shapes and reduce material waste.

9. CAUSES OF FAILURE
● Overheating:
● Wear and Tear:
● Corrosion
● Impact Damage
● Manufacturing Defects
● Fatigue Failure

10. TYPES OF SHOCK ABSORBER
Metal Spring
Hydraulic type
shock absorbers
Double acting
shock absorbers
Single acting
shock absorber
5. Lever Type
Shock Absorber Telescopic type
shock absorber

11. Flow of project
Comparison
of all material
Analysis and
result
Meshing
Boundary
condition
Problem
Statement
Design of
Helical
spring
Modelling
shock
absorber
Importing
model in
workbench

12. SOFTWARES USED
❏ CATIA
❏ Ansys

13. Used Material - Properties
Young Modulus- 130000 N/mm2
Density-8100 Kg/mm3
Poisson Ratio- 0.285
Young Modulus- 102000 N/mm2
Density- 4850 Kg/mm3
Poisson Ratio- 0.3
Young Modulus- 103000
N/mm2
Density-8160 Kg/mm3
Poisson Ratio-0.34
Young Modulus- 202000 N/mm2
Density-7820 Kg/mm3
Poisson Ratio- 0.292
Copper Alloy Spring Steel Phosphorus
bronze
Titanium Alloy

14. Design Considerations
➔ When designing shock absorbers, engineers must consider various
factors such as the weight and size of the vehicle, driving conditions,
and the desired level of comfort and handling.
➔ The design should also take into account the type of suspension system
used in the vehicle.
➔ The analysis of shock absorbers involves testing their performance
under different conditions, such as varying speeds and road surfaces, to
ensure that they meet the required specifications.
➔ This testing helps engineers optimize the design for maximum
performance and durability.

15. Design Calculation of Spring
Steel Modulus of rigidity G = 80000 N/mm2
Average shear stress =364 MPa
C = spring index = 8,
Wahl‟s stress factor= 1.8268
Mean diameter of a coil D=64mm
Diameter of wire d = 8mm
Total no of active coils = 28
Outer diameter of spring coil D0 = D +d =72mm
No of active turns n= 16
Weight of bike = 125kgs
Let weight of 1 person = 75Kgs
Weight of 2 persons = 75×2=150Kgs
Weight of bike + persons = 275Kgs
Rear suspension = 60%
Hence 60% of 275 = 165Kgs
Considering dynamic loads it will be double W = 330Kgs = 3234N
For single shock absorber weight = w/2= 1617N = W
Compression of spring (δ) = 111.98mm
Solid length, Ls=n‟×d=24×18=192mm
Free length of spring, Lf = solid length+maximum compression +
clearance between adjustable coils
= 165.6 + 111.98 + 0.15 × 111.98 = 305.77mm
Spring rate, K =14.44 Pitch of coil, P = 22.64

16. 2D DESIGN

17. 3D DESIGN

18. MESH OF SHOCK ABSORBER IN ANSYS

19. BOUNDARY CONDITION

20. RESULTS
Total Deformation
Phosphor bronze Titanium Alloy
Static Structural

21. Spring Steel Copper Alloy
RESULTS
Total Deformation

22. RESULTS
Stress
Static Structural
Phosphor bronze Titanium Alloy

23. RESULTS
Stress
Static Structural
Spring Steel Copper Alloy

24. RESULT TABLE
Sr.no Parameters Spring Steel Phosphor Bronze Titanium Alloy Copper Alloy
1) Maximum
deformation(in
mm)
0.05894 0.1121 0.12332 0.05949
2) Maximum stress
intensity
MPA(N/MM2)
127.31 83.516 120.86 126.62

25. ● Meshing element size 3mm Tetrahedron mesh.
● Load 3234 N and fixed support.
● Material used Phosphor bronze, Titanium Alloy, Copper Alloy, Spring Steel.
● On the perspective of Deformation Spring steel is better with respect to other
materials.
● Economically Effective.
CONCLUSION

26. REFERENCES
1) "Design and Analysis of a Pneumatic Shock Absorber for a Bike" by R. Ravi and K. Suresh Babu.
2) "Design and Analysis of a Twin Tube Shock Absorber for a Bike" by G. Lakshmi Narayana and K.
Vinod Kumar.
3) "Design and Analysis of an Electromagnetic Shock Absorber for a Bike" by A. Karthick, R. Arun
and M. Arulselvan.
4) "Design and Analysis of a Composite Shock Absorber for a Bike" by M. Ravi Shankar and B.
Vijaya Ramnath”.
5) "Design and Analysis of a Hydraulic Shock Absorber with Variable Damping for a Bike" by S.
Ganesh and K. Suresh Babu”.
6) "Design and Analysis of an Electromagnetic Shock Absorber for a Bike" by A. Karthick, R. Arun
and M. Arulselvan”.

27. THANK YOU