This document presents design considerations for vehicle chassis, detailing their functions, types, and general requirements. It describes various chassis types including ladder frame, monocoque, and carbon fiber, each with unique structural characteristics and applications. The document also outlines general considerations for chassis design such as weight, space, manufacturability, and load resistance.

1. DESIGN CONSIDERATIONS FOR
CHASSIS
PRESENTED BY,
MOHAMMED IBZHAN
SANDESH SHETTY
Tuesday, February 13, 2018
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2. INTRODUCTION :
• Chassis is the significant structure which propel and control an
automobile.
• A skeletal frame with various mechanical parts like engine, tires, brakes,
steering and axle assemblies.
• Usually made of a light metal or composite plastic which provides
strength needed for supporting vehicle components and load on it.
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3. FUNCTIONS :
• Provide capability to steer the vehicle.
• Provide capability to brake the vehicle safely.
• Provide isolations between road and passenger.
• To whithstand the centrifugal force by cornering.
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4. TYPES OF CHASSIS :
• Ladder frame chassis:
One of the oldest form of chassis that is still
used by most of the SUVs till today.
Resembles a shape of ladder which having
two longitudinal rails interlinked by several
lateral and cross braces.
The lateral and cross members provides
rigidity to the structure.
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5. Tuesday, February 13, 20185
• Backbone chassis:
Has a rectangular tube like a backbone and simple in
structure.
Made of glass fibre is used for joining front and rear
axle and responsible for the strength.
Space within structure used for positioning drive shaft
in case of rear wheel drive.
Drive train, engine and suspensions are connected at
the ends of the chassis.
• Monocoque chassis:
Most modern cars use this type.
A single piece of frame work that give shape to the
entire car and built by welding several pieces
together.
Demand for monocoque chassis is increased
because it is suitable for robotized production

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• Tubular space frame chassis:
A 3-dimensional design employing number of circular
and square section tubes.
Tubes are positioned in different sections to provide
mechanical strength against forces from anywhere.
Tubes are welded together and form a complex
structure.
Very strong when compared with ladder and
monocoque chassis of the same weight
• Ulsab monocoque chassis:
Traditional steel monocoque chassis becomes heavier
than ever ,as a result car makers turned to replace steel
with aluminium.
More cars use aluminium in body panels.
American steel manufacturers hired Porsche
Engineering services to develop a new kind of steel
monocoque technology calls Ultra Light Steel Auto
Body (ULSAB)

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• Carbon fibre monocoque chassis:
Carbon fibre is the most sophisticated material
using in aircrafts, spaceships and racing cars.
Because of its superior rigidity to weight ratio.
Several carbon fibres used in motor industry like
Kelvar which has rigidity to weight ratio among
them and can be found in body panels of many
exiotic cars.
• Aluminium space frame chassis:
ASF consists of extruded aluminium sections,
vacuum die cast components and aluminium sheets
of different thickness.
Highly stressed corners and joints and extruded
sections are connected by complex aluminium die
casting.
40% lighter yet 40% stiffer than contemporary steel
monocoque.
Its quite complex.

8. CHASSIS CLASSIFICATION BASED ON ENGINE LOCATION:
• Engine fitted at front.
• Engine fitted at back.
• Engine fitted at centre.
• Engine fitted at front but crosswise.
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9. General considerations related to chassis :
Body of most of the vehicle should fulfil the following requirements:
• The body should be light in weight.
• It should have minimum number of components.
• It should provide sufficient space for passengers and luggage.
• It should withstand the vibrations while in motion.
• It should offer minimum resistance to air.
• It should be cheap and easy in manufacturing.
• It should be attractive in shape and colour.
• It should have uniformly distributed load.
• It should have long fatigue life.
• It should provide good vision and ventilation.
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10. DEPENDING ON LOAD ACTING ON CHASSIS :
• Short duration load: While crossing a broken patch.
• Momentary duration load: While taking a curve.
• Impact load: Due to collision of the vehicle.
• Inertia load: While applying brakes.
• Static loads: Loads due to chassis parts.
• Overloads: Beyond design capacity.
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11. THANK YOU